BC-SW Catalog

BC-SW Catalog
Defining Innovation.
BACKWARD INCLINED fans
TYPE BC SWSI & DWDI
BULLETIN 300-F
April 2011
BC SWSI & DWDI Backward Inclined Fans
This catalog features type BC non-overloading centrifugal fans in SWSI (single width, single inlet) and
DWDI (double width, double inlet) design. BAE airfoil
fans offer a slightly higher efficiency and less noise
than BC fans at a price premium of about 2%.
However, the hollow airfoil blades are more susceptible to erosion by particulate matter in the airstream
than BC blades and thus type BAE is recommended
for clean air applications only. Both designs are a
popular choice for the efficient handling of large
volumes of relatively clean air at low to moderate
pressures in applications such as:
• HVAC (heating, ventilating and air conditioning)
• Combustion air supply
• Filtration and drying systems
• Fume hood and spray booth and other exhaust
systems
• Air pollution control (clean side of dust collectors)
• Industrial processes
Contents
Please discuss your particular application with the
Twin City Fan & Blower representative for your area.
Twin City Fan & Blower has established itself as
a leader in the design and manufacture of quality
air moving equipment and continues to advance by
implementing a philosophy that stresses quality in all
of its operations. Our products are known for their
rugged construction and reliability of operation. Twin
City Fan & Blower offers flexibility in design and construction of fans coupled with superior service before
and after the sale.
Refer to Bulletin 370 for type BAE (airfoil wheel)
SWSI and DWDI fans.
Refer to Bulletin 600 for Ventilating Sets featuring
type BC (designated as BCV) and FC (FCV) fans in
Arrangement 10. Refer to Bulletin 370 for type BAV
(airfoil wheel) ventilation sets in Arrangement 10.
Certification
Certification . . . . . . . . . . . . . . . . . . . . . . . . 2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . 2
Construction Features . . . . . . . . . . . . . . . . .
3
Arrangements . . . . . . . . . . . . . . . . . . . . . . . 4
Optional Construction . . . . . . . . . . . . . . . . . . 6
Standard Configurations. . . . . . . . . . . . . . . . . 8
Accessories. . . . . . . . . . . . . . . . . . . . . . . . . 9
Fan Selection Guidelines. . . . . . . . . . . . . . . . 12
Maximum RPM, Wheel Weights & WR2. . . . . . . 13
Material Specifications & Weights. . . . . . . . . . 14
Performance Data. . . . . . . . . . . . . . . . . . . . 17
BC SWSI. . . . . . . . . . . . . . . . . . . . . . . . 18
BC DWDI . . . . . . . . . . . . . . . . . . . . . . . 29
Dimensional Drawings . . . . . . . . . . . . . . . . . 36
Typical Specifications. . . . . . . . . . . . . . . . . . 55
Twin City Fan & Blower certifies that the SWSI
Backward Inclined fans shown on pages 18
through 28 are licensed to bear the AMCA
Seal. The ratings shown are based on tests
and procedures performed in accordance with
AMCA Publication 211 and AMCA Publication
311 and comply with the requirements of the
AMCA Certified Ratings Program.
Twin City Fan & Blower certifies that the DWDI
Backward Inclined fans shown on pages 29
through 35 are licensed to bear the AMCA
Seal. The ratings shown are based on tests
and procedures performed in accordance with
AMCA Publication 211 and comply with the
requirements of the AMCA Certified Ratings
Program.
Refer to Bulletin 306 for sound power levels.
©2011 Twin City Fan Companies, Ltd. All rights reserved throughout the world.
Bulletin illustrations cover the general appearance of Twin City Fan & Blower products at the time of publication
and we reserve the right to make changes in design and construction at any time without notice.
2
Twin City Bulletin 300
Construction Features
Wheel Construction
Type BC wheels are constructed of steel using flat
single thickness blades, solid welded to the rim and
backplate. The inlet-side rim is designed as a proper
companion for the inlet cone.
Note that the use of a conical spun shroud (rim)
makes BC fans less susceptible to the performance
losses associated with poor inlet conditions. All BC
wheels are statically and dynamically balanced to
grade BV3 per AMCA 204 for smooth operation prior
to being assembled in the fan, followed by final balance of the entire rotating assembly.
Housing Construction
All fan housings are continuously welded to provide
strength and durability for extended service life — a
necessity in all commercial and industrial installations.
All SWSI fans and DWDI Class III and IV fans feature an outlet flange for duct connection as standard.
DWDI Class I and II fan outlets are designed for slipon joint connection. A flanged outlet is available as
an option. Inlet collars for slip-joint connections are
standard on all SWSI fans. Lifting lugs are standard
on all fans. All housings are reinforced with rigid
bracing to increase structural integrity. The support
angles are intermittently welded and caulked between
welds to prevent bleed-through corrosion. Precisely
positioned cutoff plates and aerodynamically spun
inlet cones provide high efficiency and smooth airflow
through the fan.
All fans are available in standard discharge
configuration (see page 8). SWSI fans Class I and II,
sizes 270 and smaller in Arrangements 1, 4, 9 and 10
are field rotatable to any standard discharge position.
To help reduce overall heights, all DWDI fans feature
a non-rotatable housing design as standard.
Shaft
Shafts are AISI Grade 1040 or 1045 hot-rolled steel
accurately turned, ground, polished, and ring gauged
for accuracy. Shafts are generously sized for a first
critical speed of at least 1.43 times the maximum
speed for the class.
Bearings
Bearings are heavy duty, grease lubricated, spherical
roller or adapter mounted anti-friction ball, self-aligning, pillow block type, selected for minimum average
bearing life (AFBMA L-50) in excess of 200,000 hours
at the maximum fan RPM.
3
BC SWSI wheel
BC DWDI wheel
Mechanical Run Test & Final
Vibration Check
All fans are assembled for a mechanical run test and
final balance prior to shipment. Vibration readings are
taken on both fan bearings in the axial, horizontal,
and vertical directions at the specified speed. Fans
are balanced to 0.15 in./sec. peak or less.
Twin City Bulletin 300
SWSI Arrangements
Arrangement 1
SWSI — Single Width, Single Inlet
Arrangement 1 fan with optional unitary base, horizontal
split housing, shaft and V-belt drive guard.
Arrangement 1 fans are usually belt driven. The wheel
is overhung on the shaft, i.e., mounted at the end
of the shaft. The motor can be mounted in any of
the four AMCA standard motor positions, W, X, Y, or
Z. The two fan bearings are mounted on the bearing pedestal, out of the airstream. Arrangement 1
fans are thus recommended for high temperature or
contaminated air applications. Belt driven configurations offer performance flexibility. If the performance
requirements change after the fan has been installed,
it is simple and inexpensive to change the drive.
Extended lube line at
inlet — standard on all
Arrangement 3 fans.
Arrangement 3
SWSI — Single Width, Single Inlet
Arrangement 3 is available in belt driven only.
Arrangement 3 SWSI has one bearing located in
the airstream. The wheel is mounted between the
bearings and supported by the fan housing, which
makes it a structurally sound, compact, and economical arrangement.
Arrangement 4
SWSI — Single Width, Single Inlet
Arrangement 4 is available in direct drive only. The
fan wheel is mounted directly on the motor shaft with
the motor mounted on a pedestal. An Arrangement
4 design offers low maintenance as there are no
fan bearings, fan shaft or drive parts to maintain.
Arrangement 4 is typically limited to size 365 or
smaller.
Typical Direct Drive Speeds
Direct drive Arrangement 4 with bolted access door and
shaft seal.
60 Hz OPERATION
Synchronous
Full Load
Speed
Speed
3600
3500
1800
1750
1200
1170
900 870
50 Hz OPERATION
Synchronous
Full Load
Speed
Speed
3000
2900
1500
1450
1000 975
750
725
The actual full load speed of the motor can vary slightly depending upon
motor HP and motor design.
Arrangement 8 fan
with optional coupling.
Arrangement 8
SWSI — Single Width, Single Inlet
Arrangement 8 is a modified version of Arrangement
1 used for direct drive. The Arrangement 1 bearing
pedestal is extended to accommodate the motor.
A flexible coupling connects the fan and motor
shaft. Refer to the typical direct drive speeds under
Arrangement 4.
Recommended for 250 HP and larger applications.
4
Twin City Bulletin 300
SWSI Arrangements
Arrangement 9
SWSI — Single Width, Single Inlet
Arrangement 9 is available as belt driven only. A
motor slide base is mounted on the side of the
bearing pedestal. This arrangement permits the unit
to ship as a complete assembly with the motor and
drive mounted. Typically, the motor is mounted on
the left side of the pedestal for CW rotation fans and
on the right side for CCW rotation fans.
Arrangement 9F
SWSI — Single Width, Single Inlet
(Not Shown)
Arrangement 9F is available when a unit requires
a motor that is too large to mount on the side of
the bearing pedestal. The fan base is extended to
accommodate the motor, for horizontal mounting,
similar to an Arrangement 1 fan. Typically, the motor
is mounted on the left side of the pedestal for CW
rotation fans and on the right side for CCW rotation
fans. Arrangement 9F is not suitable for mounting
vibration isolators directly under the fan.
Fan shown is Arrangement 9 CW-THD with nonstandard motor location on right-hand side.
Arrangement 10
SWSI — Single Width, Single Inlet
Arrangement 10 is available as belt driven only.
For Class I and II fans, sizes 122 through 365,
Arrangement 10 units are commonly referred to
as Ventilating Sets. (Refer to Bulletin 600 for more
details.) An Arrangement 10 unit has an adjustable
motor base mounted inside the bearing pedestal. This
arrangement offers a more compact design than the
Arrangement 9 and is suitable for roof or outdoor
installations with a weather cover.
DWDI Arrangements
Class II Arrangement 10 ventilating set with
optional shaft cooler and insulated heat shield.
Arrangement 3
DWDI fans are generally supplied in Arr. 3 for V-belt
drive. The wheel is mounted between the bearings
and supported by the fan housing. Since both bearings are located in the airstream, standard DWDI
fans should be used for clean air applications with
air temperatures limited to 130°F. The motor can be
mounted in any of the four standard motor positions:
W, X, Y or Z.
Arr. 3F with
motor located in
“Z” position.
Arrangement 3F
Arr. 3F offers an integral extended base to accommodate the motor. The base is prepunched to accept
vibration isolators. Arr. 3F is available to Size 660 and
for motor positions W and Z as standard. For motor
positions X and Y, consult factory.
5
Twin City Bulletin 300
Optional Construction
Spark Resistant Construction
Split Housings
Fan applications may involve the handling of potentially explosive or flammable particles, fumes or vapors.
Such applications require careful consideration by the
system designer to insure the safe handling of such
gases. Twin City Fan & Blower offers the following
classifications of spark resistant construction per
AMCA Standard 99-0401-86. It is the specifier or the
user’s responsibility to specify the type of spark resistant construction with full recognition of the potential
hazards and the degree of protection required.
All fans are designed to permit wheel removal through
the fan inlet. To suit installation as well as transportation requirements, Twin City Fan & Blower offers
horizontal split, pie-shaped, as well as other special
split housing designs. Pie-shaped split housings allow
fan wheel and shaft removal without disconnecting
ductwork.
Type A All parts of the fan in contact with the
airstream must be made of non-ferrous
material — usually aluminum and limited to
250°F operation.
Type B The fan shall have a non-ferrous wheel and
non-ferrous ring about the opening through
which the shaft passes — usually aluminum
wheel and rub ring and limited to 250°F
construction.
Type C The fan shall be so constructed that the
shift of the wheel or shaft will not permit
two ferrous parts of the fan to rub or strike.
This is accomplished with an aluminum
inlet cone and rub ring. This construction is
limited to 500°F. Construction to 800°F is
available using a steel inlet cone with copper/bronze lining.
Notes:
1.Bearings shall be placed outside the airstream.
Therefore, do not use Arrangement 3 or 7.
2.The user shall electrically ground all fan parts.
Refer to the above listed AMCA standard for full
details
Fan with pie-shaped split housing, raised
access door and insulation pins.
Swingout Construction
Swingout fans are ideal for applications requiring
frequent cleaning and inspection of the fan wheel
and interior of the housing such as found in spray
painting booth exhaust. Refer to Bulletin GA200 for
other types of easy access fans offered by Twin City
Fan & Blower.
Special Metals
To suit the demanding applications of today’s industry, Twin City Fan & Blower offers a variety of material for construction, including aluminum and stainless
steel. We offer AWS and ASME certified welding
procedures and welding technicians to assure quality
construction when using special metals as well.
6
Twin City Bulletin 300
Optional Construction
High Temperature Modifications
Construction
Standard fan design options are available to handle
airstream temperatures to 800°F. Consult your Twin
City Fan & Blower representative for applications over
800°F. The fan bearings should be kept outside of
the hot airstream and below 130°F ambient. High
temperature operating limits, available arrangements,
and necessary modifications are shown in Table 1.
Shaft Cooler and Shaft Seal
Table 1. High Temperature Construction Requirements
TEMPERATURE
TYPE OF
LUBRICATION
OTHER REQUIREMENTS
(°F)
BEARING
–20°F To
Ball or Roller
Grease
Standard Fan
+300°F
300°F To
500°F
Ball or Roller
High Temp.
Grease
with (1) Expansion
Bearing
Ball or Roller
500°F To
High Temp.
with (1) Expansion
800°F
Grease
Bearing
Shaft Cooler, Shaft Seal. For
Arr. 1, 8, 9,
9F, 10
Arr. 9 & 10 Fans, a Motor
Heat Shield is Included.
High Temp. Aluminum Paint
Shaft Cooler, Shaft Seal. For Arr. 9
Arr. 1, 8, 9, 9F, 10
(Arr. 9 & 10
Limited to 600°F)
& 10 Fans, a Motor Heat Shield
is Included.
Derating Factors For High Temperature
Table 2. Derating Factors For High Temperature
Fan operation at high temperature adversely affects
the strength of fan wheels. As a result, the maximum
safe speed must be derated by the factors shown
in Table 2.
TEMPERATURE
(°F)
70
200
250
300
400
500
600
700
800
900
1000
Example: Maximum safe speed at 600°F for a size
365 BC, SWSI, Class II steel wheel = 0.86 x 1283 =
1103 RPM (1283 RPM is maximum RPM at 70°F).
7
AVAILABLE
ARRANGEMENTS
Arr. 1, 8, 9, 9F, 10
Arr. 3 and 3F to 130°F
Arr. 4 to 180°F
STANDARD
STEEL
1.00
0.99
0.98
0.98
0.96
0.93
0.90
0.80
0.60
—
—
STAINLESS
STEEL
1.00
0.95
0.93
0.91
0.88
0.84
0.81
0.78
0.75
0.73
0.70
Twin City Bulletin 300
Standard Configurations
Designation for Rotation and Discharge
Clockwise
Upblast
CW 360
Clockwise
Downblast
CW 180
Clockwise
Top Angular Up
CW45
Clockwise
Bottom Angular Down
CW225
Clockwise
Top Horizontal
CW90
Clockwise
Bottom Horizontal
CW270
Clockwise
Top Angular Down
CW135
Clockwise
Bottom Angular Up
CW315
Counterclockwise
Upblast
CCW360
Counterclockwise
Downblast
CCW180
Counterclockwise
Top Angular Up
CCW45
Counterclockwise
Bottom Angular Down
CCW225
Counterclockwise
Top Horizontal
CCW90
Counterclockwise
Bottom Horizontal
CCW270
Counterclockwise
Top Angular Down
CCW135
Counterclockwise
Bottom Angular Up
CCW315
Direction of rotation is determined from drive side of the fan.
On single inlet fans, the drive side is always considered the side opposite the fan inlet.
On double inlet fans with drives on both sides, the drive side is that with the higher power drive unit.
The direction of discharge is determined in accordance with the diagrams shown above. The angle of discharge
references the vertical axis of the fan and is designated in degrees above or below that reference axis.
On fans inverted for ceiling suspension or side-wall mounting, the discharge is determined when the fan is resting
on the floor.
Motor Positions
The drawing above illustrates the AMCA motor position standards for Arrangement 1 and 3 fans (Arrangement 1
shown). The location of the motor is determined by facing the drive side of the fan and designating the motor position by letters W, X, Y, or Z, in accordance with the diagram shown above.
Illustrations reprinted from AMCA Publication 99 Standards Handbook, with the express written permission from the
Air Movement and Control Association International, Inc., 30 West University Drive, Arlington Heights, IL 60004-1983.
8
Twin City Bulletin 300
Accessories
Volume Control Devices
Outlet dampers, variable inlet vanes, and variable
frequency drives are three popular devices used to
control volume for fan systems.
Outlet Dampers
The closing of the damper adds to the resistance that
the fan is working against. This moves the operating
point to the left of the initial rating point. The savings
in horsepower depends on the relative position on the
fan curve and is usually much less than offered by
other methods. Outlet dampers are typically the least
expensive option and should be considered when
infrequent operation at lesser capacity is desired or
when handling hot, humid or particulate laden air.
There are two types of outlet dampers: parallel
blade and opposed blade.
Parallel blade dampers are recommended for systems where air volume is modulated between fullopen to about 75% of open.
Opposed blade dampers cost about 10% more
and are recommended for systems where volume is
modulated over the entire range. Opposed blades
reduce air volume in a closer relationship to the control arm movement.
Variable Inlet Vanes
Performance Curves
at Different Vane Settings
10
200
75
STATIC PRESSURE
8
100
160
50
25
0
6
120
4
80
25
0
2
0
2
4
75
50
100
BRAKE HORSEPOWER
Nested
Inlet
Vanes
40
6
8
10
CFM IN 10000's
System Curve
SYSTEM CURVE
SP @ Vane Setting
BHP @ Vane Setting
SP @ VANE SETTING
BHP @ VANE SETTING
External Inlet Vanes
Variable inlet vanes cause the entering air to spin
in the direction of wheel rotation, resulting in reduction in volume, static pressure and brake horsepower
and thus providing an infinite number of fan curves
approximately parallel to the original fan curve.
Variable inlet vanes cost about 50% to 80% more
than outlet dampers but offer significant savings in
energy. Because of their simplicity, inlet vanes can be
more reliable when compared to variable frequency
drives.
There are two types of variable inlet vanes: nested
(internal type) and bolted on (external type).
Nested inlet vanes are built into the fan inlet cone
and offer the advantage of saving space and lower
cost as opposed to the external type, and they will
be provided on all fan sizes 165 and larger. Twin City
Fan & Blower offers cantilevered vanes to size 730
Class II fans to minimize insertion losses and noise
associated with center hub design.
External inlet vanes are bolted to the inlet of the
fan and are available as standard to size 150. Use of
external vanes should be considered for hostile environments since operating linkages are shielded from
the airstream. Both types of inlet vanes are available
to 600°F construction.
Variable Frequency Drive (VFD) Fan Motors
VFD changes the fan speed and can provide the
greatest potential for energy savings, although at
highest initial cost. VFD should be considered for
9
extended operation at part load conditions, especially
below 70% of the full volume operation.
Twin City Bulletin 300
Accessories
Access Doors
Bolted, quick opening, and raised bolted access doors
are available for wheel inspection or maintenance.
Bolted
Access Door
Drain
Threaded pipe coupling welded to the lowest point in
the housing scroll. All fans come with a weep hole
in the bottom of the housing.
Shaft Seal
A shaft seal reduces leakage and protects the bearings from a contaminated airstream. It is constructed
of non-asbestos woven fibrous materials (ceramic felt)
compressed between an aluminum cover plate and
the fan housing. A ceramic felt shaft seal does not
make the fan gas tight. A variety of special seals is
available for low leakage applications requiring more
positive protection, including mechanical type stuffing boxes. (The picture on page 7 shows a standard
seal.)
Quick-Opening
Access Door
Shaft Cooler or Heat Slinger
A cast aluminum shaft cooler is recommended to dissipate the heat and protect the fan bearings for all
applications over 300°F. (Refer to picture on page 7.)
Flanged Inlet
A punched inlet flange is available for duct mounting.
Flanged Outlet (DWDI Class I & II)
Raised Bolted
Access Door
A punched or unpunched flange is welded to the fan
outlet. An unpunched flanged outlet is standard on
all SWSI and DWDI Class III and IV fans.
Inlet/Outlet
Companion Flanges
Companion flanges are used for installing the fan to
flexible sleeve connections and are punched to match
the fan’s inlet or outlet.
Companion
Inlet Flange
Inlet and Outlet Screens
Safety screens are available for mounting in the fan
inlet or outlet in non-ducted applications.
10
Twin City Bulletin 300
Accessories
Belt Guards
A belt guard protects personnel from the moving
drive parts. Both standard and totally enclosed type
guards are available.
Belt Guard
Special Paint & Protective
Coatings
Twin City Fan & Blower has an in-house, specialty
coating facility to handle any type of coating requirement. Refer to Engineering Supplement ES-35 for
more details.
Bearing Upgrades
Shaft and Bearing Guards (SWSI)
Unit roller or split pillow block, double row roller
bearings are available. Split pillow block roller bearings are not available for fans with less than 17/16"
diameter bearings and are not recommended for
fans with light loadings. Refer to Engineering Data
ED-1200 and ED-1300 for the correct type of bearings, selection criteria, maintenance, etc.
Solid sheet metal guards cover shaft and bearings
and come with extended lube lines to a common
point out either side of the guard. A guard spanning
the shaft between the bearings is also available to
provide easy access to bearings for lubrication and
vibration monitoring.
Ball Bearing
Unitary Base
A structural steel base provides common support
to fan, motor and drive including guards. This style
of base is designed for use without isolators and
requires adequate foundation integrity for proper
operation.
Vibration Isolation Bases
Unit Roller
Bearing
Heavy structural base for fan, motor and drive is
designed for use with spring or rubber-in-shear type
isolators. Use of flexible connectors at inlet and outlet
is required on fans with isolators.
V-Belt Drives
V-belt drives offer an economical yet flexible means
of transmitting power to the fans. There are two
types of V-belt drives.
• Adjustable Pitch or Variable Speed Drives
An adjustable pitch drive offers easy adjustment
of speed. The motor pulley pitch can be adjusted
when the fan is at rest which can offer speed
variation of about 10% from the design speed.
This style of sheave can result in higher vibration
so adjustable pitch drives are not recommended
for use on motors over 10 HP or wherever low
vibration is required.
• Fixed Pitch or Constant Speed Drives
This type of drive offers low cost and lowest vibration levels. Speed change can often be accomplished by changing only one of the sheaves.
11
Split Pillow
Block Bearing
Other Accessories Available
• Variation in wheel diameter and width
• Inlet boxes
• Bearings RTD
• Piezometer ring airflow measuring system (see page 12)
• Consult factory for other accessories
Twin City Bulletin 300
Flow Measurement System
Piezometer Ring (Airflow Measuring System)
A piezometer ring is available on model BC fans, as
well as other Twin City Fan housed and plenum fans,
as part of an airflow measuring system, based on the
principle of a flow nozzle. The inlet cone of the fan is
used as the flow nozzle. The flow can be calculated
by measuring the pressure drop through the inlet
cone. No tubes or sensors are inserted in the high
velocity airstream which could obstruct airflow.
The system, consists of a piezometer ring mounted
at the throat and a static pressure tap mounted on
the face of the inlet cone. A differential pressure
transducer and digital display can also be provided.
The pressure drop is measured from the tap located
on the face of the inlet cone to the piezometer ring
in the throat. The inlet tap is connected to the highpressure side of the transducer and the piezometer
ring is connected to the low-pressure side.
Fan Selection Guidelines
The performance tables in this catalog are based
on fans handling standard air at a density of 0.075
pounds per cubic foot. This is equivalent to air at
70°F at sea level (29.92" Hg barometric pressure).
When specified performance is at a density difTable 3. Temperature and Altitude Density Ratios
AIR
TEMP
°F
–50
0
50
70
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
0
1000
2000
29.92
1.293
1.152
1.039
1.000
0.946
0.869
0.803
0.747
0.697
0.654
0.616
0.582
0.552
0.525
0.500
0.477
0.457
0.439
0.420
0.404
0.389
0.376
0.363
28.86
1.247
1.111
1.003
0.964
0.912
0.838
0.774
0.720
0.672
0.631
0.594
0.561
0.532
0.506
0.482
0.460
0.441
0.423
0.404
0.391
0.376
0.363
0.350
27.82
1.201
1.071
0.967
0.930
0.880
0.808
0.747
0.694
0.648
0.608
0.573
0.542
0.513
0.488
0.465
0.444
0.425
0.407
0.389
0.376
0.363
0.350
0.338
Piezometer Ring
Mounted at Throat
of Inlet Cone
ferent than standard, it must be converted to the
equivalent standard conditions before the fan can be
selected from the performance tables. The equivalent
standard conditions can be calculated by using the
Temperature and Altitude Density Ratios shown in
Table 3.
ALTITUDE IN FEET ABOVE SEA LEVEL
3000
4000
5000
6000
7000
8000
BAROMETRIC PRESSURE IN INCHES OF MERCURY
26.82
25.84
24.90
23.98
23.09
22.22
1.159
1.116
1.076
1.036
0.997
0.960
1.032
0.995
0.959
0.923
0.889
0.856
0.932
0.897
0.864
0.833
0.801
0.772
0.896
0.864
0.832
0.801
0.772
0.743
0.848
0.818
0.787
0.758
0.730
0.703
0.770
0.751
0.723
0.696
0.671
0.646
0.720
0.694
0.668
0.643
0.620
0.596
0.669
0.645
0.622
0.598
0.576
0.555
0.624
0.604
0.580
0.558
0.538
0.518
0.586
0.565
0.544
0.524
0.505
0.486
0.552
0.532
0.513
0.493
0.476
0.458
0.522
0.503
0.484
0.466
0.449
0.433
0.495
0.477
0.459
0.442
0.426
0.410
0.470
0.454
0.437
0.421
0.405
0.390
0.448
0.432
0.416
0.400
0.386
0.372
0.427
0.412
0.397
0.382
0.368
0.354
0.410
0.395
0.380
0.366
0.353
0.340
0.393
0.379
0.365
0.351
0.338
0.326
0.375
0.362
0.350
0.336
0.323 0.311
0.363
0.349
0.336
0.324
0.312
0.300
0.349
0.336
0.324
0.312
0.300
0.289
0.337
0.325
0.313
0.301
0.290
0.279
0.325
0.314
0.302
0.291
0.280
0.270
Example
Assume a 365 BC SWSI fan to handle 15,500 CFM,
2.5" SP, at 300°F and 3000 ft altitude.
1.For the operating conditions of 300°F and 3000 ft
altitude, the factor can be found in Table 3 to be
0.624.
2. Divide the operating SP by this factor. Thus, 2.5"
÷ 0.624 = 4" SP, which is the equivalent static
pressure at standard air density.
12
Based on Twin City Fan laboratory tests, the system was determined to be accurate within +/-5%.
Refer to Twin City Fan Engineering Supplement
ES-105.
NOTE: Twin City Fan does not recommend placement
of flow measuring probes inside the fan inlet cone in the
path of airflow. These devices create disturbances and
unpredictable performance losses. Twin City Fan will
not be responsible for loss of performance due to such
devices.
9000
10000
15000
21.39
0.924
0.824
0.743
0.714
0.676
0.620
0.573
0.533
0.498
0.467
0.440
0.416
0.394
0.375
0.352
0.341
0.326
0.313
0.300
0.289
0.279
0.269
0.259
20.58
0.889
0.792
0.715
0.688
0.651
0.598
0.552
0.514
0.480
0.450
0.424
0.401
0.380
0.361
0.344
0.328
0.315
0.303
0.290
0.279
0.268
0.259
0.250
16.89
0.729
0.650
0.586
0.564
0.534
0.490
0.453
0.421
0.393
0.369
0.347
0.328
0.311
0.296
0.282
0.269
0.258
0.248
0.237
0.228
0.220
0.212
0.205
3.From the 365 BC SWSI performance table find the
fan RPM and BHP for 15,500 CFM and 4" SP to
be 893 RPM and 12.86 BHP (by interpolation) at
standard conditions. 12.86 BHP is also referred to
as “cold” or “starting” brake horsepower.
To determine the BHP at operating conditions,
multiply the BHP at standard conditions by the factor
from Table 3 (12.86 x 0.624 = 8.04 BHP). The BHP
at operating conditions is 8.04 BHP.
Twin City Bulletin 300
Maximum RPM, Wheel Weights
& WR2 (moment of inertia in lb-ft2)
BC SWSI
FAN SIZE
122
135
150
165
182
200
222
245
270
300
330
365
402
445
490
542
600
660
730
807
890
982
MAX.
RPM
3167
2874
2587
2352
2118
1932
1737
1577
1397
1257
1143
995
903
817
742
670
606
551
498
450
408
370
CLASS I
WHEEL
WR2
WEIGHT
(LB-FT2)
(LB)
15
1.7
17
2.4
20
3.7
24
5.7
31
8.8
38
12.5
66
23.6
81
38.3
94
56.4
113
88.8
151
149
198
245
244
361
340
566
393
816
461
1209
593
1954
859
3008
1147
5336
1391
8228
1902
13450
2243
19589
MAX.
RPM
4119
3738
3364
3058
2729
2490
2238
2033
1803
1623
1475
1283
1163
1052
956
863
780
710
641
580
526
477
CLASS II
WHEEL
WR2 WEIGHT
(LB-FT2)
(LB)
15
1.7
18
2.7
21
4.1
28
7.0
39
10.8
49
17.4
74
28.8
87
42.9
103
64.6
125
101
167
158
214
260
254
382
392
692
455
1001
542
1392
642
2066
975
3629
1142
5336
1466
8754
1908
13451
2257
19590
MAX.
RPM
5208
4726
4253
3867
3473
3169
2848
2587
2287
2059
1871
1727
1566
1416
1286
1162
1050
955
863
780
708
641
CLASS III
CLASS IV
WHEEL
WHEEL
WR2
MAX.
WR2
WEIGHT
WEIGHT
(LB-FT2)
RPM
(LB-FT2)
(LB)
(LB)
22
2.4
5608 25
2.7
27
3.9
5099 28
3.9
31
5.8
4580 33
5.8
38
8.4
4167 37
8.4
53
13.9
3766 53
13.9
63
19.8
3442 75
25.3
85
32.0
3088 98
40.3
110
50.9
2808 130
66.8
132
79.2
2544 152
97.8
172
139
2291 172 136
215
221
2081 205 200
273
288
1883 252 297
301
437
1706 298 437
412
681
1545 446 776
478
985
1401 550 1195
604
1570
1260 731 1994
793
2647
1146 907 3141
1068
4034
1040
1250 4961
1274
6160 940
1567 7724
1711
10416
851
1980
12378
2378
17378
772
2679
20204
2777
26316
CONSULT FACTORY
BC DWDI
FAN SIZE
MAX.
RPM
122
3196
135
2904
150
2594
165
2358
182
2149
200
1961
222
1762
245
1601
270
1392
300
1253
330
1139
365
1015
402 920
445 832
490 748
542 676
600 611
660 555
730 502
807 459
890 416
982 377
CLASS I
WHEEL
WR2
WEIGHT
(LB-FT2)
(LB)
20.4
2.7
23.7
3.9
29.8
5.9
37.1
9.3
53.2
14.3
60.7
20.4
85.6
35.1
119
60.5
140
90.5
172
145
253
251
315
397
370
585
558
914
642
1321
743
1960
912
3070
1194
4646
1738
9198
2178
14334
3085
22490
3580
32972
MAX.
RPM
4168
3787
3383
3075
2776
2533
2277
2068
1830
1647
1497
1302
1181
1068
966
872
789
717
648
589
534
484
CLASS II
CLASS III
CLASS IV
WHEEL
WHEEL
WHEEL
WR2 MAX.
WR2
MAX.
WR2
WEIGHT
WEIGHT
WEIGHT
(LB-FT2)
RPM
(LB-FT2)
RPM
(LB-FT2)
(LB)
(LB)
(LB) 22.1
2.7
32.7
4.5CONSULT*CONSULT*
37.7
6.8FACTORYFACTORY
47.5
11.3
59.7
17.2
3504
79.6
23.1
3766
88.1
23.4
91.3
29.0
3197
100
33.3
3442
122
42.2
108
45.7
2874
134
52.7
3088
163
66.4
130
69.7
2610
164
81.1
2808
217
110
172
108
2267
205
129
2544
252
170
208
171
2040
277
234
2290
297
235
275
270
1855
348
378
2081
339
343
342
426
1651
442
581
1883
398
510
403
627
1497
460
750
1706
485
753
656
1165
1354
635
1152
1545
726
1345
763
1690
1222
728
1674
1401
874
2027
819
2363
1104
919
2606
1260
1097
3239
961
3513
998
1232
4506
1146
1392
5174
1420
6213
907
1606
6760
1040
1918
8291
1752
9201
820
1910
10010
940
2320
13075
2276
14866
746
2729
18438
851
3051
21302
3040
22484
677
3625
29218
772
3949
33373
3528
32965
CONSULT FACTORY
CONSULT FACTORY
* Operating speeds above 4000 RPM are not recommended. Consult factory.
13
Twin City Bulletin 300
Material Specifications & Weights
BC SWSI Class I
HOUSING
SIZE
SIDES
SCROLL
122
14
14
135
14
14
150
14
14
165
14
14
182
14
14
200
14
14
222
12
14
245
12
14
270
12
14
300
10
12
330
10
12
365
10
12
402
10
12
445
10
12
490
10
12
542
10
12
600
10
12
660
10
12
730
10
10
807
10
10
890 7
10
982 7 7
Bearing Types:
B = Ball Bearing
SHAFT DIAMETER & BEARINGS
ARR 1 & 9
ARR 3
SHAFT BEARING SHAFT BEARING
DIA.
TYPE
DIA.
TYPE
1
B
1
B
1
B
1
B
1
B
1
B
1
B
1
B
B
13⁄16
B
13⁄16
B
17⁄16
B
17⁄16
B
17⁄16
B
17⁄16
B
17⁄16
B
17⁄16
B
17⁄16
B
111⁄16
B
111⁄16
B
115⁄16
B
111⁄16
B
115⁄16
B
115⁄16
B
115⁄16
B
115⁄16
B
23⁄16
B
115⁄16
B
27⁄16
B
23⁄16
R
211⁄16
B
27⁄16
R
215⁄16
B
215⁄16
R
215⁄16
R
215⁄16
R
37⁄16
R
37⁄16
R
37⁄16
R
315⁄16
R
315⁄16
R
315⁄16
R
315⁄16
SR
415⁄16
SR
415⁄16
R = Unit Roller Bearings
BARE FAN WEIGHT (LB)
ARR 1
ARR 3
ARR 9
118
135
163
192
245
296
387
467
563
678
819
1009
1339
1573
1834
2634
3124
4007
4962
5016
6831
8908
100
120
143
192
211
239
278
338
419
624
880
948
1210
1530
1695
2190
3020
3850
4570
5250
6300
7390
124
142
171
201
257
311
406
490
591
712
860
1059
1406
1652
1925
2765
3281
4207
5210
5267
7173
9353
SR = Split Pillow Block Roller Bearings
BC SWSI Class II
SIZE
122
135
150
165
182
200
222
245
270
300
330
365
402
445
490
542
600
660
730
807
890
982
Bearing Types:
14
HOUSING
SIDES
14
14
14
14
14
14
12
12
12
10
10
10
10
10
10
10
10
10
10
10
7
7
SCROLL
14
14
14
14
14
14
14
14
14
12
12
12
12
12
12
12
12
12
10
10
10
7
B = Ball Bearing
SHAFT DIAMETER & BEARINGS
ARR 1 & 9
ARR 3
SHAFT BEARING SHAFT BEARING
DIA.
TYPE
DIA.
TYPE
1
B
1
B
1
B
1
B
B
13⁄16
B
13⁄16
B
13⁄16
B
13⁄16
B
17⁄16
B
17⁄16
B
17⁄16
B
17⁄16
B
17⁄16
B
17⁄16
B
111⁄16
B
111⁄16
B
111⁄16
B
111⁄16
B
115⁄16
B
115⁄16
B
23⁄16
B
23⁄16
B
27⁄16
B
27⁄16
R
27⁄16
B
27⁄16
R
211⁄16
R
211⁄16
R
211⁄16
R
215⁄16
R
215⁄16
R
37⁄16
R
37⁄16
R
37⁄16
R
315⁄16
R
315⁄16
R
315⁄16
R
315⁄16
SR
47⁄16
SR
47⁄16
SR
415⁄16
SR
415⁄16
SR
57⁄16
SR
57⁄16
R = Unit Roller Bearings
BARE FAN WEIGHT (LB)
ARR 1
ARR 3
123
141
173
203
261
307
396
489
577
693
855
1080
1395
1640
1914
2762
3237
4204
5133
5238
7196
9138
110
132
157
211
232
263
306
372
461
686
968
1043
1331
1683
1865
2409
3322
4235
5027
5775
6930
8128
ARR 9
129
148
182
213
274
322
416
513
605
728
898
1134
1465
1722
2009
2900
3399
4415
5390
5500
7556
9594
SR = Split Pillow Block Roller Bearings
Twin City Bulletin 300
Material Specifications & Weights
BC SWSI Class III
HOUSING
SIZE
122
135
150
165
182
200
222
245
270
300
330
365
402
445
490
542
600
660
730
807
890
Bearing Types:
SIDES
10
10
10
10
10
10
10
7
7
7
7
7
7
7
7
7
7
7
7
7
7
SCROLL
10
10
10
10
10
10
10
7
7
7
7
7
7
7
7
7
7
7
7
7
7
B = Ball Bearing
SHAFT DIAMETER & BEARINGS
ARR 1 & 9
ARR 3
SHAFT BEARING SHAFT BEARING
DIA.
TYPE
DIA.
TYPE
17⁄16
B
17⁄16
B
B
17⁄16
B
17⁄16
B
111⁄16
B
111⁄16
B
111⁄16
B
111⁄16
B
111⁄16
B
111⁄16
B
111⁄16
B
115⁄16
B
115⁄16
R
115⁄16
B
115⁄16
R
23⁄16
B
115⁄16
R
23⁄16
R
23⁄16
R
27⁄16
R
27⁄16
R
211⁄16
R
27⁄16
R
211⁄16
R
211⁄16
R
215⁄16
R
215⁄16
R
37⁄16
R
215⁄16
R
37⁄16
R
37⁄16
R
315⁄16
SR
315⁄16
R
47⁄16
SR
315⁄16
R
47⁄16
SR
47⁄16
SR
415⁄16
SR
415⁄16
SR
415⁄16
SR
57⁄16
SR
57⁄16
R = Unit Roller Bearings
BARE FAN WEIGHT (LB)
ARR 1
ARR 3
ARR 9
139
159
198
224
293
343
442
620
740
950
1157
1387
1719
2112
2478
3509
4429
5283
6365
6376
7662
195
223
276
363
394
433
477
539
639
1029
1047
1448
1805
2237
2543
3245
4437
5922
6921
7986
9516
146
167
208
236
308
360
465
651
777
997
1215
1456
1805
2218
2602
3684
4651
5547
6683
6694
8045
SR = Split Pillow Block Roller Bearings
BC SWSI Class IV
HOUSING
SIZE
122
135
150
165
182
200
222
245
270
300
330
365
402
445
490
542
600
660
730
807
890
Bearing Types:
15
SIDES
7
7
7
7
7
7
7
7
7
7
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
SCROLL
7
7
7
7
7
7
7
7
7
7
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
B = Ball Bearing
SHAFT DIAMETER & BEARINGS
ARR 1 & 9
ARR 3
SHAFT BEARING SHAFT BEARING
DIA.
TYPE
DIA.
TYPE
111⁄16
B
111⁄16
B
B
111⁄16
B
111⁄16
B
111⁄16
B
111⁄16
B
111⁄16
R
115⁄16
B
111⁄16
R
115⁄16
R
115⁄16
R
23⁄16
R
115⁄16
R
23⁄16
R
23⁄16
R
27⁄16
R
23⁄16
R
27⁄16
R
27⁄16
R
211⁄16
R
211⁄16
R
215⁄16
R
215⁄16
R
37⁄16
R
215⁄16
R
37⁄16
R
37⁄16
R
315⁄16
R
37⁄16
R
315⁄16
SR
315⁄16
R
47⁄16
SR
47⁄16
SR
415⁄16
SR
47⁄16
SR
415⁄16
SR
415⁄16
SR
57⁄16
SR
57⁄16
SR
57⁄16
SR
515⁄16
SR
515⁄16
R = Unit Roller Bearings
BARE FAN WEIGHT (LB)
ARR 1
ARR 3
ARR 9
176
202
236
279
381
469
582
697
855
1079
1472
1903
2340
2925
3376
4391
5301
6392
7874
7754
9198
210
248
307
404
438
481
531
599
710
1144
1556
1610
2006
2486
2825
3607
4930
6581
7690
8874
10574
185
212
248
293
400
493
611
732
898
1133
1546
1998
2457
3071
3545
4611
5566
6712
8268
8142
9658
SR = Split Pillow Block Roller Bearings
Twin City Bulletin 300
Material Specifications & Weights
BC DWDI Class I & II
HOUSING
SIZE
SIDES
SCROLL
122
14
14
135
14
14
150
14
14
165
14
14
182
12
14
200
12
14
222
12
14
245
12
14
270
12
14
300
10
12
330
10
12
365
10
12
402
10
12
445
10
12
490
10
12
542
10
12
600
10
12
660
10
12
730
10
10
807
10
10
890 7
10
982 7 7
Bearing Types:
B = Ball Bearing
SHAFT DIAMETER & BEARINGS
BARE FAN WEIGHT (LB.)
CLASS I
CLASS II
ARR. 3
ARR. 3F
SHAFT DIAMETER BEARING
SHAFT DIAMETER BEARING
CLASS I CLASS II CLASS I CLASS II
@ BRG.
@ WHEEL TYPE
@ BRG. @ WHEEL
TYPE
13⁄16
B
17⁄16
17⁄16
B
139
153
181
199
13⁄16
13⁄16
B
111⁄16
111⁄16
B
159
174
207
226
13⁄16
17⁄16
B
111⁄16
111⁄16
B
193
212
251
276
17⁄16
17⁄16
B
115⁄16
115⁄16
B
222
244
289
317
17⁄16
111⁄16
B
115⁄16
115⁄16
B
248
273
322
355
111⁄16
111⁄16
B
23⁄16
23⁄16
B
344
378
447
491
111⁄16
115⁄16
B
27⁄16
27⁄16
B
451
496
586
645
115⁄16
23⁄16
B
27⁄16
27⁄16
B
509
560
662
728
23⁄16
23⁄16
B
211⁄16
211⁄16
R
639
703
831
914
23⁄16
27⁄16
B
27⁄16
215⁄16
R
895
985
1164
1281
27⁄16
27⁄16
B
27⁄16
37⁄16
R
1015
1117
1320
1452
27⁄16
211⁄16
B
211⁄16
37⁄16
R
1352
1487
1758
1933
211⁄16
215⁄16
R
211⁄16
37⁄16
R
1690
1859
2197
2417
27⁄16
37⁄16
R
215⁄16
315⁄16
R
2100
2310
2730
3003
27⁄16
37⁄16
R
37⁄16
315⁄16
R
2310
2541
3003
3303
211⁄16
315⁄16
R
37⁄16
47⁄16
R
2946
3241
3830
4213
215⁄16
47⁄16
R
315⁄16
415⁄16
R
4150
4565
—
—
37⁄16
47⁄16
R
315⁄16
415⁄16
R
5300
5830
—
—
37⁄16
415⁄16
R
315⁄16
515⁄16
R
6100
6710
—
—
315⁄16
57⁄16
R
47⁄16
67⁄16
SR
7580
8338
—
—
315⁄16
315⁄16
515⁄16
R
47⁄16
615⁄16
SR
9100
10010
—
—
67⁄16
SR
57⁄16
71⁄2
SR
11052
12157
—
—
415⁄16
R = Unit Roller Bearings
SR = Split Pillow Block Roller Bearings
BC DWDI Class III & IV
SIZE
HOUSING
CLASS III
SIDES
SCROLL
122
10
10
135
10
CONSULT10
FACTORY10
150
10
165
10
10
182
10
10
200
10
10
222
10
10
245 7 7
270 7 7
300 7 7
330 7 7
365 7 7
402 7 7
445 7 7
490 7 7
542 7 7
600 7 7
660 7 7
730 7 7
807 7 7
890 7 7
982 7 7
Bearing Types:
B = Ball Bearing
CLASS IV
SIDES SCROLL
7
7
7CONSULT 7
7FACTORY 7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
SHAFT DIAMETER & BEARINGS
BARE FAN WEIGHT
CLASS III
CLASS IV
ARR. 3
SHAFT DIAMETER
BEARING SHAFT DIAMETER BEARING
CLASS III CLASS IV
@ BRG. @ WHEEL
TYPE
@ BRG. @ WHEEL TYPE
15
15
15
15
1 ⁄16
B
1 ⁄16
1 ⁄16
B
1 ⁄16
115⁄16
B
23⁄16
23⁄16
B
115⁄16 CONSULT
CONSULT
CONSULT
FACTORY
FACTORY
FACTORY
23⁄16
B
27⁄16
27⁄16
B
23⁄16
23⁄16
B
27⁄16
27⁄16
B
23⁄16
23⁄16
R
27⁄16
27⁄16
R
464
516
23⁄16
27⁄16
R
23⁄16
215⁄16
SR
628
698
27⁄16
27⁄16
R
27⁄16
37⁄16
SR
801
892
27⁄16
215⁄16
R
211⁄16
315⁄16
SR
884
982
27⁄16
37⁄16
R
215⁄16
315⁄16
SR
1080
1200
211⁄16
37⁄16
R
215⁄16
47⁄16
SR
1473
1637
211⁄16
37⁄16
R
37⁄16
415⁄16
SR
1626
1807
215⁄16
315⁄16
R
37⁄16
415⁄16
SR
2043
2271
215⁄16
315⁄16
R
315⁄16
57⁄16
SR
2554
2838
37⁄16
47⁄16
R
315⁄16
57⁄16
SR
3175
3528
37⁄16
415⁄16
R
47⁄16
57⁄16
SR
3472
3858
315⁄16
57⁄16
R
47⁄16
515⁄16
SR
4400
4890
315⁄16
57⁄16
SR
415⁄16
67⁄16
SR
6189
6877
47⁄16
515⁄16
SR
57⁄16
67⁄16
SR
8108
9010
415⁄16
615⁄16
SR
515⁄16
71⁄2
SR
9333
10370
415⁄16
—
—
SR
—
—
SR
11597
12886
—
—
SR
—
—
SR
13922
15470
—
—
—
—
—
—
—
—
R = Unit Roller Bearings
SR = Split Pillow Block Roller Bearings
SpecificationS subject to change without notice.
16
Twin City Bulletin 300
Performance Data
Typical BC SWSI Performance Curve
120
SP
100
BHP
80
80
SE
60
60
40
40
20
20
0
10
20
30
40
50
60
70
80
90
BRAKE HORSEPOWER IN PERCENTS OF MAX. BHP
100
STATIC EFFICIENCY
STATIC PRESSURE IN PERCENTS OF SHUT-OFF NO DELIVERY (SND)
120
100
CFM IN PERCENTS OF WIDE OPEN VOLUME (WOV)
Submittal Drawing Index
The submittal drawings on pages 36 through 54 represent only a handful of the standard drawings available
for layout purposes. For additional drawings refer to the Twin City Fan & Blower Fan Selector Program and
Electronic Catalog, or Drawing Supplement 301 which can be found at www.tcf.com. For scaled drawings in
AutoCad format that can be used for design purposes refer to the FANBLK software. Contact your local Twin
City Fan & Blower representative for the Fan Selector and FANBLK software.
SWSI
SWSI
ARR.
CLASS
SIZE
122-270
I & II
300-730
807-982
1
122-330
III
365-890
122-330
IV
365-890
122-270
I & II
330-730
807-982
3
122-330
III
365-890
122-330
IV
365-890
105-200
4
I & II
222-365
ROT.
Yes
No
No
No
No
No
No
Yes
No
No
No
No
No
No
No
Yes
Yes
DWG.
NO.
9237
9238
9259
9244
9245
9249
9250
9240
9834
9241
9257
9242
9243
9247
9248
16433
16434
LOCATION
Fan Selector
Page 37
Page 38
Page 42
Page 43
Page 46
Page 47
Fan Selector
Page 39
Page 40
Fan Selector
Fan Selector
Fan Selector
Fan Selector
Fan Selector
Fan Selector
Fan Selector
DWDI
ARR.
CLASS
3
I & II
I
3F
II
17
SIZE
122-270
300-730
807-982
122-270
300-490
122-270
300-490
ROT.
No
No
No
No
No
No
No
DWG.
NO.
14967
14968
9258
16026
16027
16032
16033
ARR.
CLASS
I & II
9
III
IV
I & II
9F
III
IV
9SB
I, II & III
9ST
I, II & III
I
10
II
SIZE
122-270
300-730
122-330
365-890
122-330
365-890
122-270
122-300
330-730
122-330
365-890
122-330
365-890
245-660
245-660
122-365
402-600
122-365
402-600
ROT.
Yes
No
No
No
No
No
Yes
No
No
No
No
No
No
No
No
Yes
No
Yes
No
DWG.
NO.
9239
9238
9128
9129
9132
9133
14390
14391
14392
9130
9131
9134
9135
15401
15402
9260
9261
14301
9261
LOCATION
Page 36
Fan Selector
Page 44
Page 45
Fan Selector
Fan Selector
Fan Selector
Fan Selector
Fan Selector
Fan Selector
Fan Selector
Fan Selector
Fan Selector
Fan Selector
Fan Selector
Fan Selector
Fan Selector
Fan Selector
Fan Selector
LOCATION
Page
Page
Page
Page
Page
Page
Page
48
49
50
51
52
53
54
Twin City Bulletin 300
Performance Data
BC SWSI 122
Outlet Area - 0.86 ft2
0.25" SP
CFM OV
RPM BHP
688 800 869 0.05
774 900 931 0.06
860 1000 994 0.07
946 1100 1058 0.09
1032 1200 1123 0.11
1204 1400 1256 0.15
1376 1600 1396 0.20
1548 1800 1539 0.27
1720 2000 1685 0.36
1892 2200 1834 0.46
2064 2400 1984 0.58
2236 2600 2135 0.72
2408 2800 2287 0.88
2580 3000 2439 1.07
2752 3200 2593 1.28
2924 3400 2746 1.52
CFM
1720
1892
2064
2236
2408
2580
2752
2924
3096
3268
3440
3612
OV
2000
2200
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
5" SP
RPM BHP
3059 2.05
3144 2.26
3238 2.50
3337 2.77
3442 3.06
3552 3.39
3665 3.74
3781 4.11
3901 4.52
4023 4.96
4147 5.43
4272 5.93
MAXIMUM RPM:
Wheel Dia. - 12.25 inches
Tip Speed - 3.21 x RPM
Max. BHP = 0.076 (RPM÷1000)3
0.50" SP
RPM BHP
1044 0.08
1096 0.10
1152 0.12
1210 0.13
1271 0.16
1397 0.21
1525 0.27
1655 0.34
1790 0.43
1929 0.54
2072 0.66
2216 0.81
2363 0.98
2511 1.17
2660 1.39
2810 1.64
0.75" SP
RPM BHP
1195 0.12
1240 0.14
1289 0.16
1342 0.18
1397 0.21
1514 0.26
1638 0.33
1765 0.42
1893 0.51
2024 0.63
2159 0.76
2297 0.91
2438 1.08
2581 1.28
2726 1.51
2872 1.76
1" SP
1.5" SP
2" SP
2.5" SP
3" SP
3.5" SP
4" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1335 0.17
1370 0.18
1413 0.21 1642 0.31
1461 0.23 1677 0.34 1879 0.46
1512 0.26 1720 0.37 1911 0.49 2093 0.63
1622 0.32 1816 0.45 1992 0.58 2158 0.72 2317 0.87 2471 1.03
1738 0.40 1922 0.54 2088 0.68 2244 0.83 2390 0.98 2532 1.15 2671 1.33
1861 0.49 2035 0.64 2193 0.79 2340 0.95 2480 1.12 2612 1.29 2741 1.48
1988 0.60 2154 0.76 2305 0.93 2445 1.10 2578 1.27 2705 1.46 2827 1.65
2116 0.72 2277 0.90 2421 1.08 2556 1.26 2683 1.45 2805 1.65 2922 1.84
2245 0.86 2403 1.06 2542 1.25 2671 1.45 2794 1.65 2911 1.86 3023 2.06
2377 1.01 2531 1.23 2667 1.44 2791 1.66 2909 1.87 3023 2.09 3131 2.31
2512 1.19 2659 1.42 2793 1.66 2915 1.89 3028 2.11 3138 2.35 3243 2.58
2650 1.40 2789 1.64 2921 1.89 3040 2.14 3151 2.38 3256 2.63 3358 2.88
2791 1.63 2922 1.88 3049 2.15 3167 2.41 3276 2.68 3378 2.94 3477 3.20
2934 1.89 3057 2.15 3179 2.43 3295 2.72 3402 2.99 3503 3.27 3599 3.55
5.5" SP
RPM BHP
3172 2.26
3250 2.48
3340 2.73
3436 3.00
3538 3.31
3645 3.64
3756 4.01
3870 4.40
3986 4.82
4106 5.27
4228 5.76
4352 6.28
6" SP
RPM BHP
3283 2.48
3355 2.71
3440 2.96
3533 3.25
3631 3.56
3735 3.90
3843 4.28
3955 4.69
4070 5.12
4187 5.59
4307 6.09
4430 6.62
7" SP
8" SP
9" SP
10" SP
11" SP
12" SP
13" SP
14" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
3500 2.94
3559 3.18 3758 3.67
3633 3.44 3821 3.95 4006 4.48 4186 5.04
3719 3.75 3898 4.27 4073 4.81 4245 5.37 4413 5.96 4578 6.56
3812 4.08 3985 4.61 4152 5.17 4315 5.74 4476 6.34
3910 4.44 4079 5.00 4240 5.57 4397 6.16 4551 6.77
4013 4.83 4176 5.40 4335 6.00 4487 6.61
4120 5.26 4279 5.86 4433 6.47 4582 7.09
4231 5.73 4386 6.34 4535 6.97
4345 6.23 4496 6.87
4461 6.75
4579 7.31
Class I — 3167
Class II — 4119
Class III — 4600
4.5" SP
RPM BHP
2805
2866
2944
3035
3132
3236
3344
3457
3572
3691
1.51
1.67
1.85
2.05
2.28
2.54
2.82
3.13
3.47
3.83
Selections above 4000 RPM not recommended. Consult factory.
BC SWSI 135
Outlet Area - 1.05 ft2
Wheel Dia. - 13.50 inches
0.25" SP
0.50" SP
CFM OV
RPM BHP RPM BHP
840 800 791 0.06 949 0.10
945 900 847 0.08 997 0.12
1050 1000 905 0.09 1048 0.14
1155 1100 963 0.11 1102 0.17
1260 1200 1022 0.13 1157 0.19
1470 1400 1144 0.18 1272 0.25
1680 1600 1272 0.25 1388 0.33
1890 1800 1403 0.33 1508 0.42
2100 2000 1537 0.44 1631 0.53
2310 2200 1672 0.56 1758 0.66
2520 2400 1809 0.71 1888 0.82
2730 2600 1946 0.88 2020 1.00
2940 2800 2085 1.09 2154 1.21
3150 3000 2224 1.32 2289 1.45
3360 3200 2364 1.58 2425 1.72
3570 3400 2505 1.88 2562 2.02
CFM
2100
2310
2520
2730
2940
3150
3360
3570
3780
3990
4200
4410
OV
2000
2200
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
5" SP
RPM BHP
2780 2.50
2858 2.77
2944 3.06
3035 3.39
3131 3.75
3231 4.14
3335 4.58
3441 5.04
3550 5.54
3661 6.08
3775 6.66
3890 7.28
MAXIMUM RPM:
5.5" SP
RPM BHP
2882 2.76
2954 3.03
3036 3.33
3124 3.67
3217 4.04
3315 4.46
3417 4.91
3521 5.39
3627 5.90
3737 6.46
3848 7.06
3962 7.70
Class I — 2874
Max. BHP = 0.124 (RPM÷1000)3
1" SP
1.5" SP
2" SP
2.5" SP
3" SP
3.5" SP
4" SP
4.5" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1213 0.20
1245 0.23
1285 0.25 1491 0.38
1328 0.28 1524 0.41 1707 0.56
1375 0.32 1563 0.45 1736 0.60 1901 0.77
1475 0.40 1651 0.54 1811 0.70 1960 0.88 2105 1.06 2244 1.26
1582 0.49 1748 0.65 1899 0.83 2039 1.01 2172 1.20 2300 1.40 2426 1.62 2548 1.85
1695 0.60 1851 0.78 1995 0.97 2128 1.16 2254 1.37 2374 1.58 2490 1.80 2604 2.03
1810 0.73 1960 0.93 2097 1.14 2224 1.34 2344 1.56 2459 1.78 2570 2.02 2676 2.26
1927 0.88 2073 1.10 2203 1.32 2325 1.55 2441 1.78 2550 2.01 2657 2.26 2759 2.51
2045 1.05 2188 1.29 2314 1.53 2431 1.78 2542 2.02 2648 2.27 2750 2.53 2848 2.79
2165 1.24 2304 1.51 2428 1.77 2540 2.03 2647 2.29 2750 2.56 2848 2.83 2943 3.11
2289 1.47 2422 1.75 2543 2.03 2653 2.31 2756 2.59 2855 2.88 2950 3.16 3042 3.45
2415 1.72 2541 2.02 2660 2.32 2768 2.62 2868 2.92 2963 3.22 3056 3.53 3145 3.84
2544 2.00 2662 2.31 2777 2.64 2884 2.96 2982 3.28 3075 3.60 3164 3.92 3251 4.25
2674 2.32 2785 2.64 2895 2.98 3000 3.33 3098 3.68 3189 4.01 3276 4.35 3359 4.69
6" SP
RPM BHP
2982 3.03
3048 3.30
3126 3.62
3212 3.97
3302 4.35
3397 4.78
3496 5.24
3598 5.74
3703 6.27
3810 6.84
3920 7.46
4032 8.12
7" SP
8" SP
9" SP
10" SP
11" SP
12" SP
13" SP
14" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
3178 3.58
3233 3.87 3413 4.48
3301 4.20 3472 4.82 3639 5.47 3801 6.14
3380 4.57 3542 5.21 3700 5.87 3856 6.56 4008 7.27 4157 8.00
3466 4.98 3622 5.64 3773 6.31 3921 7.01 4066 7.74 4210 8.49 4350 9.26 4488 10.06
3555 5.42 3708 6.10 3854 6.80 3996 7.52 4135 8.26 4272 9.03 4407 9.82 4540 10.63
3649 5.91 3797 6.61 3941 7.33 4079 8.07 4213 8.83 4344 9.61 4473 10.42
3748 6.44 3891 7.16 4030 7.90 4166 8.67 4297 9.46 4424 10.26 4548 11.07
3849 7.01 3989 7.76 4124 8.53 4256 9.31 4384 10.12 4509 10.95
3953 7.62 4090 8.41 4222 9.20 4350 10.01 4475 10.83 4597 11.68
4059 8.27 4193 9.09 4323 9.92 4448 10.76 4569 11.60
4168 8.96 4299 9.82 4426 10.68 4548 11.55
Class II — 3738
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
18
Tip Speed - 3.53 x RPM
0.75" SP
RPM BHP
1086 0.15
1127 0.17
1172 0.19
1220 0.22
1271 0.25
1378 0.32
1491 0.41
1607 0.51
1724 0.63
1844 0.77
1967 0.93
2093 1.12
2221 1.33
2352 1.58
2485 1.86
2618 2.17
Class III — 4600
Selections above 4000 RPM not recommended. Consult factory.
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Consult Factory = Bold face
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC SWSI 150
Outlet Area - 1.29 ft2
0.50" SP
CFM OV
RPM BHP
1032 800 853 0.13
1161 900 896 0.15
1290 1000 941 0.17
1548 1200 1038 0.23
1806 1400 1141 0.31
2064 1600 1245 0.40
2322 1800 1352 0.51
2580 2000 1462 0.65
2838 2200 1576 0.81
3096 2400 1692 1.00
3354 2600 1811 1.22
3612 2800 1930 1.47
3870 3000 2051 1.76
4386 3400 2295 2.46
4902 3800 2543 3.34
5418 4200 2792 4.41
CFM
3096
3354
3612
3870
4128
4386
4644
4902
5160
5418
5934
6450
OV
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
4600
5000
Wheel Dia. - 15.00 inches
Tip Speed - 3.93 x RPM
Max. BHP = 0.211 (RPM÷1000)3
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1091 0.25
1119 0.28
1154 0.31 1341 0.47
1235 0.39 1405 0.56 1561 0.74
1325 0.49 1483 0.67 1627 0.86 1893 1.31
1420 0.60 1570 0.80 1706 1.01 1952 1.48 2181 1.99
1521 0.74 1662 0.96 1791 1.19 2026 1.68 2238 2.21 2441 2.80
1624 0.90 1759 1.14 1882 1.39 2106 1.91 2309 2.47 2499 3.08 2682 3.72 2858 4.41
1728 1.08 1860 1.35 1978 1.62 2192 2.18 2387 2.77 2568 3.40 2740 4.06 2907 4.76 3070 5.51
1834 1.28 1963 1.58 2077 1.88 2283 2.48 2470 3.10 2645 3.76 2809 4.44 2967 5.17 3121 5.93 3272 6.72
1942 1.52 2067 1.85 2178 2.17 2376 2.81 2557 3.47 2726 4.15 2886 4.87 3037 5.62 3183 6.39 3326 7.21
2052 1.79 2172 2.14 2282 2.49 2474 3.18 2649 3.88 2812 4.60 2966 5.34 3114 6.12 3255 6.92 3391 7.75
2165 2.10 2279 2.46 2386 2.84 2574 3.58 2743 4.32 2902 5.08 3051 5.86 3194 6.66 3331 7.49 3463 8.35
2397 2.83 2497 3.22 2597 3.65 2779 4.49 2940 5.33 3089 6.17 3231 7.03 3366 7.90 3495 8.78 3621 9.70
2634 3.74 2724 4.17 2814 4.62 2988 5.57 3144 6.51 3286 7.44 3420 8.38 3549 9.34 3673 10.31 3792 11.28
2875 4.85 2957 5.31 3038 5.79 3200 6.82 3352 7.87 3490 8.91 3618 9.93 3741 10.98 3859 12.03 3974 13.09
10" SP
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
3419 7.55
3467 8.06 3604 8.93 3739 9.84
3524 8.61 3656 9.51 3785 10.44 3912 11.39 4036 12.37
3591 9.23 3717 10.15 3840 11.09 3962 12.06 4082 13.06 4200 14.09 4317 15.15
3665 9.91 3786 10.85 3904 11.81 4021 12.80 4136 13.82 4250 14.86 4362 15.93 4473 17.03 4582 18.15
3743 10.64 3861 11.61 3975 12.59 4088 13.61 4198 14.64 4307 15.70 4416 16.79 4523 17.91
3823 11.42 3939 12.42 4051 13.43 4160 14.47 4267 15.52 4373 16.61 4477 17.72 4580 18.85
3907 12.27 4020 13.29 4130 14.34 4237 15.40 4342 16.49 4444 17.59 4545 18.72
3994 13.18 4104 14.23 4211 15.29 4316 16.39 4419 17.50 4520 18.65
4084 14.15 4191 15.23 4296 16.33 4398 17.44 4499 18.59 4598 19.75
4269 16.26 4373 17.43 4473 18.60 4572 19.79
4461 18.61 4561 19.87
MAXIMUM RPM: Class I — 2587 Class II — 3364 Class III — 4253 Class IV — 4580 Selections above 4000 RPM not recommended. Consult factory.
BC SWSI 165
Outlet Area - 1.57 ft2
Wheel Dia. - 16.50 inches
Tip Speed - 4.32 x RPM
Max. BHP = 0.339 (RPM÷1000)3
0.50" SP
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
CFM OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1256 800 777 0.15 992 0.30
1413 900 816 0.18 1019 0.34
1570 1000 858 0.21 1051 0.38 1220 0.57
1884 1200 947 0.29 1125 0.47 1279 0.68 1421 0.90
2198 1400 1041 0.38 1208 0.59 1351 0.81 1482 1.05 1722 1.59
2512 1600 1137 0.49 1295 0.73 1431 0.98 1554 1.24 1778 1.80 1985 2.42
2826 1800 1234 0.63 1387 0.90 1516 1.17 1633 1.45 1845 2.05 2038 2.70 2222 3.40
3140 2000 1335 0.79 1482 1.10 1604 1.39 1716 1.70 1919 2.33 2103 3.01 2275 3.74 2441 4.53 2601 5.36
3454 2200 1440 0.99 1577 1.32 1697 1.65 1803 1.98 1998 2.66 2174 3.37 2339 4.14 2495 4.94 2646 5.80 2793 6.69
3768 2400 1546 1.22 1674 1.57 1791 1.94 1894 2.29 2081 3.03 2250 3.78 2409 4.57 2559 5.41 2702 6.29 2841 7.21 2977 8.17
4082 2600 1654 1.49 1773 1.86 1887 2.26 1987 2.65 2167 3.43 2331 4.23 2484 5.06 2629 5.93 2766 6.84 2899 7.79 3028 8.77
4396 2800 1764 1.81 1874 2.19 1983 2.62 2082 3.04 2256 3.88 2415 4.73 2563 5.61 2702 6.50 2836 7.45 2964 8.42 3088 9.44
4710 3000 1874 2.16 1977 2.57 2080 3.01 2177 3.47 2348 4.37 2501 5.28 2645 6.20 2780 7.14 2910 8.12 3035 9.13 3154 10.16
5338 3400 2098 3.03 2190 3.48 2280 3.95 2370 4.46 2536 5.50 2682 6.52 2817 7.54 2945 8.58 3068 9.64 3185 10.71 3299 11.82
5966 3800 2324 4.11 2407 4.60 2488 5.11 2569 5.66 2727 6.82 2869 7.97 2997 9.09 3119 10.24 3236 11.41 3348 12.58 3456 13.76
6594 4200 2552 5.43 2627 5.96 2701 6.52 2774 7.10 2921 8.35 3059 9.64 3184 10.89 3301 12.15 3412 13.41 3519 14.69 3623 15.98
CFM
3768
4082
4396
4710
5024
5338
5652
5966
6280
6594
7222
7850
8160
OV
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
4600
5000
5197
10" SP
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
3111 9.18
3155 9.80 3280 10.86 3402 11.96
3209 10.49 3328 11.57 3445 12.70 3560 13.85 3673 15.04
3271 11.25 3384 12.35 3496 13.50 3606 14.67 3715 15.89 3822 17.13 3928 18.41
3338 12.07 3448 13.21 3555 14.37 3661 15.58 3765 16.81 3868 18.07 3970 19.37 4070 20.70 4169 22.05
3410 12.97 3516 14.13 3621 15.34 3722 16.55 3823 17.82 3921 19.10 4019 20.42 4116 21.77 4212 23.15 4307 24.56 4400 25.99
3483 13.92 3588 15.13 3690 16.36 3789 17.62 3886 18.90 3982 20.22 4076 21.56 4169 22.93 4262 24.34 4353 25.76 4444 27.22
3560 14.96 3662 16.19 3762 17.46 3860 18.77 3955 20.09 4047 21.41 4139 22.79 4229 24.19 4318 25.61 4406 27.06 4493 28.52
3640 16.08 3740 17.35 3837 18.65 3933 19.98 4026 21.33 4117 22.71 4206 24.11 4294 25.54 4380 26.98 4465 28.44 4550 29.95
3723 17.28 3820 18.59 3915 19.92 4008 21.27 4099 22.65 4189 24.07 4276 25.50 4362 26.96 4446 28.43 4529 29.93
3893 19.87 3987 21.29 4078 22.71 4167 24.14 4254 25.59 4339 27.05 4424 28.57 4507 30.09 4588 31.63
4069 22.75 4159 24.26 4247 25.79 4334 27.34 4418 28.89 4500 30.44 4581 32.01
4158 24.28 4246 25.84 4333 27.43 4418 29.03 4501 30.63 4582 32.24
MAXIMUM RPM: Class I — 2352 Class II — 3058 Class III — 3867 Class IV — 4167 Selections above 4000 RPM not recommended. Consult factory.
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
19
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Consult Factory = Bold face
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC SWSI 182
Outlet Area - 1.92 ft2
Wheel Dia. - 18.25 inches
Tip Speed - 4.78 x RPM
Max. BHP = 0.552 (RPM÷1000)3
0.50" SP
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
CFM OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1536 800 695 0.17
1728 900 724 0.20 932 0.38
1920 1000 757 0.24 951 0.42 1126 0.64
2304 1200 831 0.32 1002 0.53 1160 0.76 1306 1.02
2688 1400 914 0.42 1066 0.66 1208 0.91 1342 1.19
3072 1600 1003 0.55 1138 0.81 1267 1.09 1391 1.39 1621 2.03
3456 1800 1096 0.71 1217 1.00 1335 1.30 1449 1.62 1663 2.30 1864 3.06
3840 2000 1191 0.91 1302 1.22 1409 1.55 1514 1.88 1714 2.61 1903 3.40 2081 4.24 2252 5.15
4224 2200 1288 1.13 1391 1.48 1489 1.83 1586 2.20 1773 2.96 1950 3.78 2120 4.67 2282 5.60 2437 6.58
4608 2400 1387 1.40 1482 1.78 1573 2.16 1663 2.55 1838 3.36 2005 4.22 2165 5.13 2320 6.11 2469 7.13 2612 8.18
4992 2600 1487 1.71 1576 2.12 1661 2.53 1744 2.94 1908 3.81 2066 4.71 2218 5.66 2365 6.67 2507 7.72 2645 8.81 2779 9.95
5376 2800 1588 2.07 1671 2.50 1751 2.94 1829 3.39 1982 4.30 2132 5.25 2276 6.25 2416 7.28 2553 8.38 2685 9.51 2814 10.68
5760 3000 1689 2.47 1768 2.94 1843 3.41 1917 3.88 2061 4.86 2202 5.85 2340 6.89 2473 7.97 2604 9.09 2730 10.25 2854 11.46
6528 3400 1895 3.46 1964 3.98 2032 4.50 2099 5.04 2227 6.12 2354 7.23 2479 8.36 2601 9.53 2720 10.73 2837 11.97 2952 13.25
7296 3800 2102 4.68 2165 5.26 2226 5.85 2287 6.45 2404 7.64 2518 8.85 2631 10.09 2743 11.35 2853 12.64 2961 13.97 3067 15.33
8064 4200 2310 6.17 2368 6.82 2424 7.47 2479 8.12 2587 9.43 2692 10.76 2795 12.11 2897 13.48 2999 14.87 3099 16.28 3197 17.71
CFM
4608
4992
5376
5760
6144
6528
6912
7296
7680
8064
8832
9600
10" SP
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2400
2600 2909 11.13
2800 2939 11.89 3061 13.14
3000 2975 12.71 3093 13.99 3208 15.31 3321 16.66
3200 3017 13.60 3131 14.92 3243 16.28 3352 17.66 3459 19.08 3565 20.54
3400 3064 14.56 3174 15.91 3282 17.30 3388 18.72 3492 20.17 3594 21.66 3695 23.19 3794 24.74
3600 3116 15.60 3222 16.99 3326 18.40 3429 19.87 3530 21.35 3630 22.89 3727 24.42 3823 26.00 3918 27.62 4012 29.27
3800 3172 16.72 3274 18.13 3375 19.59 3475 21.10 3573 22.62 3669 24.17 3764 25.75 3858 27.38 3950 29.01 4041 30.69
4000 3231 17.91 3331 19.39 3428 20.86 3525 22.40 3620 23.97 3713 25.55 3806 27.18 3897 28.83 3987 30.51 4075 32.20
4200 3295 19.21 3391 20.71 3485 22.23 3579 23.81 3671 25.40 3761 27.01 3851 28.67 3940 30.37 4027 32.07 4114 33.82
4600 3431 22.03 3520 23.61 3609 25.24 3696 26.87 3783 28.55 3869 30.25 3954 31.98 4037 33.71 4120 35.50 4202 37.32
5000 3577 25.23 3661 26.90 3744 28.59 3827 30.34 3908 32.09 3989 33.87 4069 35.67 4148 37.49 4227 39.36 4305 41.24
MAXIMUM RPM:
Class I — 2118
Class II — 2729
Class III — 3473
20" SP
RPM BHP
4131
4163
4199
4283
4382
32.40
33.94
35.58
39.15
43.14
Class IV— 3766
BC SWSI 200
Outlet Area - 2.30 ft2
Wheel Dia. - 20.00 inches
Tip Speed - 5.24 x RPM
Max. BHP = 0.872 (RPM÷1000)3
0.50" SP
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
CFM OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1840 800 634 0.21
2070 900 660 0.24 850 0.46
2300 1000 690 0.28 868 0.51 1027 0.77
2760 1200 758 0.38 914 0.63 1058 0.91 1191 1.22
3220 1400 833 0.51 971 0.78 1102 1.09 1224 1.42
3680 1600 914 0.66 1037 0.97 1155 1.30 1268 1.66 1479 2.44
4140 1800 998 0.85 1109 1.20 1217 1.56 1321 1.94 1517 2.76 1700 3.66
4600 2000 1085 1.08 1186 1.46 1284 1.85 1380 2.25 1563 3.12 1735 4.07 1899 5.09 2054 6.17
5060 2200 1173 1.35 1267 1.77 1357 2.19 1445 2.62 1616 3.54 1778 4.53 1933 5.59 2081 6.71 2223 7.89
5520 2400 1263 1.67 1350 2.12 1433 2.58 1515 3.05 1675 4.02 1828 5.05 1975 6.15 2116 7.32 2252 8.54 2383 9.81
5980 2600 1354 2.04 1435 2.53 1513 3.02 1589 3.52 1739 4.55 1883 5.64 2022 6.78 2157 7.99 2287 9.25 2413 10.56 2535 11.93
6440 2800 1446 2.47 1522 2.99 1595 3.52 1666 4.05 1806 5.14 1943 6.28 2075 7.48 2203 8.72 2328 10.03 2449 11.39 2566 12.79
6900 3000 1538 2.95 1610 3.51 1679 4.07 1746 4.64 1878 5.81 2007 7.00 2133 8.25 2255 9.54 2374 10.88 2490 12.28 2603 13.73
7820 3400 1725 4.12 1789 4.75 1851 5.38 1911 6.02 2029 7.31 2145 8.65 2259 10.00 2371 11.40 2480 12.84 2587 14.33 2691 15.85
8740 3800 1913 5.58 1971 6.28 2027 6.98 2082 7.69 2189 9.12 2294 10.58 2398 12.08 2500 13.58 2600 15.12 2699 16.72 2796 18.34
9660 4200 2103 7.36 2155 8.13 2207 8.91 2257 9.68 2356 11.26 2452 12.86 2546 14.47 2640 16.12 2733 17.79 2824 19.47 2914 21.19
CFM
5520
5980
6440
6900
7360
7820
8280
8740
9200
9660
10580
11500
10" SP
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2400
2600 2654 13.35
2800 2681 14.25 2792 15.74
3000 2713 15.22 2821 16.76 2926 18.34 3030 19.98
3200 2751 16.28 2856 17.88 2958 19.50 3057 21.15 3155 22.85 3252 24.61
3400 2794 17.44 2894 19.05 2993 20.72 3090 22.43 3185 24.17 3279 25.97 3370 27.77 3461 29.64
3600 2841 18.68 2938 20.34 3033 22.04 3127 23.79 3220 25.59 3310 27.40 3400 29.28 3487 31.15 3574 33.10 3660 35.08
3800 2892 20.02 2985 21.71 3078 23.47 3169 25.27 3258 27.08 3346 28.94 3433 30.85 3519 32.80 3603 34.76 3686 36.77 3768 38.81
4000 2946 21.45 3036 23.18 3126 24.99 3214 26.82 3301 28.70 3386 30.59 3471 32.56 3554 34.53 3636 36.54 3717 38.58 3797 40.66
4200 3003 22.97 3091 24.78 3177 26.61 3263 28.50 3347 30.40 3430 32.35 3512 34.34 3593 36.37 3673 38.42 3752 40.51 3830 42.63
4600 3127 26.35 3209 28.26 3290 30.21 3370 32.17 3449 34.17 3527 36.19 3605 38.28 3681 40.36 3757 42.51 3832 44.69 3906 46.89
5000 3259 30.15 3336 32.16 3412 34.19 3488 36.29 3562 38.38 3636 40.52 3710 42.71 3782 44.89 3854 47.11 3925 49.36 3995 51.63
MAXIMUM RPM:
Class I — 1932
Class II — 2490
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
20
Class III — 3169
Class IV — 3442
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Consult Factory = Bold face
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC SWSI 222
Outlet Area - 2.85 ft2
Wheel Dia. - 22.25 inches
Tip Speed - 5.83 x RPM
Max. BHP = 1.49 (RPM÷1000)3
0.50" SP
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
CFM OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2280 800 570 0.26
2565 900 594 0.30 764 0.57
2850 1000 621 0.35 780 0.63 923 0.95
3420 1200 681 0.47 822 0.78 951 1.13 1071 1.52
3990 1400 749 0.63 874 0.97 991 1.35 1101 1.76
4560 1600 822 0.82 933 1.21 1039 1.62 1140 2.05 1330 3.02
5130 1800 898 1.06 998 1.49 1094 1.93 1188 2.40 1364 3.42 1528 4.53
5700 2000 976 1.34 1067 1.81 1155 2.29 1241 2.79 1405 3.87 1560 5.04 1707 6.30 1847 7.64
6270 2200 1055 1.68 1139 2.19 1220 2.71 1300 3.26 1453 4.39 1599 5.61 1738 6.92 1871 8.31 1999 9.78
6840 2400 1136 2.07 1214 2.63 1289 3.20 1363 3.78 1506 4.98 1644 6.27 1775 7.62 1902 9.06 2024 10.57 2142 12.15
7410 2600 1218 2.53 1291 3.13 1361 3.74 1429 4.36 1564 5.64 1693 6.98 1818 8.40 1939 9.89 2056 11.46 2169 13.08 2279 14.78
7980 2800 1301 3.06 1369 3.71 1435 4.36 1499 5.02 1625 6.38 1747 7.78 1866 9.27 1981 10.81 2093 12.43 2202 14.12 2307 15.84
8550 3000 1384 3.67 1448 4.35 1510 5.05 1571 5.76 1689 7.20 1805 8.68 1918 10.22 2028 11.83 2135 13.50 2239 15.23 2340 17.01
9690 3400 1552 5.11 1609 5.89 1665 6.68 1720 7.47 1825 9.07 1929 10.72 2032 12.40 2132 14.13 2230 15.92 2326 17.76 2420 19.65
10830 3800 1722 6.93 1773 7.79 1824 8.67 1874 9.55 1970 11.33 2064 13.14 2157 14.98 2248 16.83 2339 18.76 2427 20.72 2514 22.73
11970 4200 1893 9.15 1940 10.10 1986 11.06 2031 12.02 2120 13.98 2206 15.96 2290 17.95 2375 20.01 2458 22.06 2540 24.14 2621 26.29
CFM
6840
7410
7980
8550
9120
9690
10260
10830
11400
11970
13110
14250
10" SP
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2400
2600 2386 16.54
2800 2410 17.65 2510 19.50
3000 2440 18.87 2536 20.76 2631 22.73 2724 24.75
3200 2474 20.19 2567 22.13 2659 24.15 2749 26.22 2837 28.33 2923 30.48
3400 2512 21.60 2603 23.63 2691 25.67 2778 27.78 2864 29.96 2948 32.18 3030 34.42 3112 36.74
3600 2554 23.13 2642 25.21 2727 27.31 2812 29.50 2895 31.71 2976 33.95 3057 36.28 3135 38.60 3213 41.00 3290 43.45
3800 2600 24.80 2685 26.93 2767 29.07 2849 31.30 2929 33.55 3009 35.89 3087 38.24 3164 40.65 3239 43.06 3314 45.56
4000 2649 26.58 2731 28.77 2811 30.97 2890 33.24 2968 35.56 3045 37.93 3120 40.31 3195 42.77 3269 45.27 3342 47.81
4200 2701 28.49 2780 30.73 2857 32.98 2934 35.31 3009 37.66 3084 40.09 3158 42.57 3230 45.04 3302 47.60 3373 50.18
4600 2812 32.66 2886 35.04 2958 37.42 3030 39.86 3102 42.38 3172 44.88 3241 47.42 3310 50.03 3378 52.68 3445 55.36
5000 2932 37.42 3001 39.90 3069 42.41 3137 45.00 3204 47.61 3270 50.24 3336 52.94 3401 55.64 3466 58.42 3529 61.16
MAXIMUM RPM:
Class I — 1737
Class II — 2238
Class III — 2848
20" SP
RPM BHP
3388
3414
3443
3512
3593
48.11
50.40
52.80
58.11
64.03
Class IV — 3088
BC SWSI 245
Outlet Area - 3.45 ft2
Wheel Dia. - 24.50 inches
Tip Speed - 6.41 x RPM
Max. BHP = 2.40 (RPM÷1000)3
0.50" SP
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
CFM OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2760 800 517 0.31
3105 900 539 0.36 694 0.69
3450 1000 563 0.42 708 0.76 838 1.15
4140 1200 618 0.57 746 0.95 863 1.37 972 1.84
4830 1400 680 0.76 793 1.18 899 1.63 999 2.13
5520 1600 746 0.99 846 1.46 943 1.96 1035 2.49 1207 3.65
6210 1800 815 1.28 905 1.79 993 2.33 1078 2.90 1238 4.13 1388 5.49
6900 2000 885 1.62 968 2.19 1048 2.77 1126 3.38 1276 4.69 1416 6.10 1550 7.63 1677 9.25
7590 2200 957 2.03 1034 2.65 1107 3.28 1180 3.94 1319 5.32 1452 6.80 1578 8.38 1699 10.07 1815 11.84
8280 2400 1031 2.51 1101 3.17 1170 3.87 1237 4.57 1367 6.02 1492 7.58 1612 9.23 1727 10.97 1838 12.80 1945 14.71
8970 2600 1105 3.06 1171 3.79 1235 4.53 1297 5.28 1419 6.82 1537 8.46 1651 10.18 1760 11.97 1867 13.88 1969 15.83 2069 17.89
9660 2800 1180 3.70 1242 4.48 1301 5.26 1360 6.07 1474 7.71 1586 9.43 1694 11.22 1798 13.07 1900 15.04 1999 17.08 2095 19.19
10350 3000 1255 4.42 1313 5.25 1370 6.10 1425 6.96 1532 8.70 1638 10.49 1741 12.37 1840 14.30 1938 16.33 2032 18.41 2125 20.60
11730 3400 1408 6.18 1460 7.12 1510 8.06 1560 9.03 1656 10.97 1751 12.97 1844 15.00 1935 17.09 2024 19.26 2111 21.48 2197 23.79
13110 3800 1561 8.36 1608 9.41 1654 10.46 1699 11.53 1787 13.69 1872 15.87 1957 18.11 2040 20.36 2122 22.67 2203 25.07 2282 27.51
14490 4200 1716 11.03 1759 12.19 1801 13.36 1842 14.52 1923 16.90 2001 19.28 2078 21.71 2155 24.19 2230 26.66 2305 29.20 2379 31.81
CFM
8280
8970
9660
10350
11040
11730
12420
13110
13800
14490
15870
17250
10" SP
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2400
2600 2166 20.01
2800 2188 21.36 2279 23.61
3000 2215 22.84 2303 25.15 2389 27.53 2473 29.96
3200 2246 24.44 2331 26.81 2414 29.23 2496 31.75 2576 34.31 2654 36.90
3400 2280 26.13 2363 28.60 2443 31.08 2522 33.63 2600 36.26 2676 38.93 2751 41.67 2825 44.46
3600 2319 28.01 2398 30.50 2476 33.07 2553 35.71 2628 38.37 2702 41.10 2775 43.90 2847 46.76 2917 49.63 2987 52.60
3800 2360 30.01 2437 32.58 2512 35.19 2586 37.87 2659 40.61 2731 43.41 2802 46.27 2872 49.18 2941 52.15 3009 55.17
4000 2404 32.15 2478 34.77 2551 37.46 2623 40.21 2694 43.03 2764 45.90 2833 48.82 2901 51.79 2968 54.81 3034 57.87
4200 2451 34.45 2523 37.17 2593 39.90 2663 42.72 2732 45.60 2800 48.54 2866 51.48 2933 54.56 2998 57.63 3062 60.73
4600 2552 39.51 2619 42.37 2685 45.29 2750 48.22 2815 51.24 2879 54.29 2942 57.38 3005 60.57 3067 63.79 3128 67.05
5000 2660 45.23 2723 48.24 2785 51.29 2847 54.43 2908 57.61 2968 60.79 3028 64.05 3087 67.33 3146 70.68 3204 74.06
MAXIMUM RPM:
Class I — 1577
Class II — 2033
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
21
Class III — 2587
20" SP
RPM BHP
3076
3099
3126
3188
3261
58.24
60.97
63.93
70.32
77.46
Class IV — 2808
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Consult Factory = Bold face
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC SWSI 270
Outlet Area - 4.19 ft2
Wheel Dia. - 27.00 inches
Tip Speed - 7.08 x RPM
Max. BHP = 4.05 (RPM÷1000)3
0.50" SP
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
CFM OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
3352 800 457 0.36 592 0.72
3771 900 480 0.43 603 0.79 725 1.27
4190 1000 504 0.50 621 0.89 726 1.33
5028 1200 557 0.69 661 1.11 755 1.59 843 2.12
5866 1400 614 0.91 709 1.40 795 1.92 875 2.48 1026 3.75
6704 1600 674 1.20 761 1.75 840 2.32 914 2.91 1051 4.21 1184 5.74
7542 1800 736 1.54 816 2.15 890 2.78 959 3.43 1088 4.82 1206 6.32 1324 8.05 1449 10.16
8380 2000 800 1.96 874 2.63 943 3.33 1007 4.02 1128 5.49 1241 7.08 1346 8.77 1452 10.68 1564 12.93
9218 2200 865 2.45 934 3.19 998 3.94 1059 4.70 1174 6.30 1280 7.95 1381 9.72 1476 11.58 1572 13.64 1672 15.99
10056 2400 932 3.04 995 3.83 1056 4.65 1113 5.47 1222 7.17 1323 8.93 1419 10.77 1511 12.72 1598 14.74 1686 16.95
10894 2600 999 3.71 1058 4.57 1115 5.45 1169 6.33 1272 8.14 1369 10.02 1461 11.95 1549 13.97 1633 16.07 1714 18.25
11732 2800 1066 4.47 1122 5.41 1176 6.35 1227 7.29 1325 9.22 1418 11.22 1506 13.26 1590 15.36 1671 17.53 1750 19.82
12570 3000 1135 5.36 1187 6.36 1238 7.37 1287 8.38 1380 10.42 1469 12.53 1553 14.68 1634 16.88 1712 19.14 1788 21.49
14246 3400 1272 7.47 1320 8.62 1365 9.75 1409 10.88 1495 13.19 1576 15.53 1654 17.90 1729 20.32 1802 22.81 1872 25.30
15922 3800 1412 10.14 1454 11.39 1495 12.65 1536 13.94 1614 16.48 1689 19.05 1762 21.70 1832 24.35 1900 27.04 1966 29.78
17598 4200 1551 13.36 1590 14.76 1628 16.16 1665 17.56 1737 20.37 1807 23.20 1875 26.08 1940 28.96 2004 31.89 2066 34.85
9" SP
RPM BHP
CFM OV
10056 2400
10894 2600
11732 2800
12570 3000
13408 3200
14246 3400
15084 3600
15922 3800
16760 4000
17598 4200
19274 4600
20950 5000
20" SP
RPM BHP
10" SP
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1869 22.11
1876 23.09 1961 25.89 2048 28.95
1900 24.59 1975 27.19 2052 30.02 2131 33.09 2212 36.43
1933 26.41 2002 28.95 2072 31.67 2142 34.51 2215 37.64 2289 40.97 2365 44.56
1969 28.38 2036 31.00 2102 33.72 2167 36.51 2233 39.48 2299 42.56 2367 45.89 2437 49.48 2508 53.28
2008 30.53 2074 33.27 2138 36.06 2200 38.88 2261 41.76 2323 44.82 2385 48.00 2447 51.29 2511 54.82 2577 58.62
2049 32.84 2113 35.64 2175 38.49 2236 41.42 2296 44.43 2354 47.44 2412 50.56 2470 53.79 2528 57.13 2588 60.71
2093 35.36 2154 38.20 2215 41.16 2274 44.13 2333 47.25 2390 50.36 2445 53.47 2501 56.76 2556 60.08 2610 63.44
2139 38.07 2198 40.98 2257 44.01 2314 47.04 2371 50.19 2427 53.40 2482 56.68 2536 60.00 2588 63.28 2641 66.75
2186 40.89 2244 43.96 2301 47.06 2357 50.21 2412 53.41 2466 56.65 2520 60.01 2573 63.42 2625 66.88 2675 70.29
2285 47.08 2340 50.38 2394 53.71 2448 57.13 2500 60.50 2551 63.89 2602 67.38 2652 70.90 2702 74.52 2751 78.16
2390 54.10 2442 57.59 2493 61.11 2544 64.73 2594 68.37 2643 72.02 2691 75.66 2739 79.38 2786 83.11 2833 86.92
MAXIMUM RPM:
Class I — 1397
Class II — 1803
Class III — 2287
1776
1795
1825
1862
1941
2030
2127
2644
2648
2666
2693
2726
2799
2879
19.38
20.60
22.13
23.93
27.89
32.54
37.86
62.64
64.40
67.04
70.24
73.88
81.84
90.74
Class IV — 2544
BC SWSI 300
Outlet Area - 5.17 ft2
Wheel Dia. - 30.00 inches
Tip Speed - 7.85 x RPM
Max. BHP = 6.86 (RPM÷1000)3
0.50" SP
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
CFM OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
4136 800 411 0.45 533 0.89
4653 900 431 0.53 543 0.98 652 1.57
5170 1000 453 0.62 558 1.09 653 1.64
6204 1200 501 0.84 595 1.38 680 1.96 758 2.61
7238 1400 552 1.12 638 1.73 715 2.36 787 3.05 923 4.63
8272 1600 606 1.47 684 2.15 756 2.86 823 3.60 946 5.20 1065 7.08
9306 1800 662 1.90 734 2.65 801 3.44 863 4.24 979 5.94 1085 7.79 1192 9.95 1304 12.53
10340 2000 720 2.42 786 3.24 848 4.09 906 4.96 1015 6.78 1117 8.75 1212 10.84 1307 13.18 1408 15.98
11374 2200 778 3.02 840 3.93 898 4.86 953 5.80 1056 7.76 1152 9.81 1242 11.98 1329 14.31 1415 16.84 1505 19.75
12408 2400 838 3.74 895 4.72 950 5.73 1002 6.76 1099 8.84 1190 11.00 1277 13.29 1359 15.67 1438 18.18 1517 20.90
13442 2600 898 4.56 952 5.64 1003 6.71 1052 7.81 1145 10.05 1232 12.36 1314 14.73 1394 17.24 1470 19.85 1543 22.55
14476 2800 959 5.51 1010 6.68 1058 7.84 1104 8.99 1192 11.37 1276 13.84 1355 16.36 1430 18.92 1504 21.64 1575 24.46
15510 3000 1021 6.61 1068 7.84 1114 9.09 1158 10.33 1242 12.87 1321 15.43 1397 18.09 1470 20.82 1540 23.59 1609 26.51
17578 3400 1145 9.23 1187 10.62 1228 12.02 1268 13.43 1345 16.27 1418 19.15 1488 22.08 1556 25.08 1621 28.12 1685 31.25
19646 3800 1270 12.50 1308 14.05 1345 15.60 1382 17.20 1452 20.32 1520 23.52 1585 26.75 1648 30.02 1709 33.33 1769 36.74
21714 4200 1396 16.50 1430 18.19 1465 19.95 1498 21.66 1563 25.13 1626 28.63 1687 32.17 1746 35.75 1803 39.34 1859 42.99
CFM OV
12408 2400
13442 2600
14476 2800
15510 3000
16544 3200
17578 3400
18612 3600
19646 3800
20680 4000
21714 4200
23782 4600
25850 5000
10" SP
RPM BHP
1682 27.28
1688 28.47
1710 30.36
1739 32.56
1772 35.02
1807 37.67
1844 40.53
1883 43.61
1924 46.91
1967 50.45
2056 58.08
2150 66.69
MAXIMUM RPM:
1598
1615
1643
1675
1746
1827
1913
23.91
25.40
27.34
29.50
34.37
40.17
46.65
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1765 31.96 1843 35.72
1777 33.54 1847 37.06 1918 40.85 1991 44.97
1802 35.75 1865 39.10 1928 42.61 1993 46.42 2060 50.56 2129 55.04
1833 38.31 1892 41.63 1950 45.05 2009 48.68 2069 52.53 2131 56.70 2194 61.13 2257 65.74
1866 41.03 1923 44.43 1980 47.99 2035 51.56 2090 55.27 2146 59.21 2202 63.28 2260 67.68 2319 72.33 2379 77.26
1901 43.95 1958 47.55 2012 51.10 2066 54.81 2118 58.51 2171 62.43 2223 66.40 2275 70.50 2329 74.92 2383 79.48
1939 47.18 1993 50.77 2047 54.51 2099 58.26 2150 62.08 2201 66.05 2250 69.97 2300 74.12 2349 78.30 2399 82.71
1978 50.58 2031 54.31 2083 58.10 2134 61.96 2184 65.89 2233 69.88 2282 74.02 2329 78.10 2376 82.30 2423 86.63
2019 54.22 2070 58.02 2121 61.96 2170 65.85 2219 69.89 2268 74.08 2315 78.22 2362 82.50 2407 86.71 2453 91.15
2106 62.19 2154 66.25 2202 70.41 2249 74.59 2296 78.88 2341 83.09 2386 87.43 2431 91.89 2475 96.38 2519 101.01
2197 71.02 2243 75.38 2289 79.85 2334 84.34 2378 88.83 2422 93.41 2465 97.98 2507 102.54 2549 107.21 2590 111.87
Class I — 1257
Class II — 1623
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
22
9" SP
RPM BHP
Class III — 2059
Class IV — 2290
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Consult Factory = Bold face
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC SWSI 330
Outlet Area - 6.26 ft2
Wheel Dia. - 33.00 inches
Tip Speed - 8.64 x RPM
Max. BHP = 11.05 (RPM÷1000)3
0.50" SP
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
CFM OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
5008 800 374 0.54 484 1.07
5634 900 392 0.64 493 1.18 593 1.90
6260 1000 412 0.75 508 1.33 594 1.99
7512 1200 455 1.02 541 1.67 618 2.37 690 3.17
8764 1400 502 1.36 580 2.09 650 2.86 716 3.70 839 5.60
10016 1600 551 1.78 622 2.60 688 3.47 748 4.35 860 6.30 968 8.56
11268 1800 602 2.30 668 3.22 728 4.16 785 5.14 890 7.19 987 9.45 1083 12.02 1186 15.19
12520 2000 655 2.93 715 3.93 771 4.96 824 6.01 923 8.21 1015 10.57 1102 13.13 1188 15.95 1280 19.34
13772 2200 708 3.66 764 4.77 817 5.89 867 7.04 960 9.39 1047 11.86 1130 14.53 1208 17.31 1286 20.37 1368 23.89
15024 2400 762 4.52 814 5.72 864 6.95 911 8.18 1000 10.72 1082 13.32 1161 16.09 1236 18.99 1308 22.04 1379 25.29 1453 28.95
16276 2600 817 5.53 866 6.84 912 8.13 957 9.47 1041 12.17 1120 14.96 1195 17.84 1267 20.85 1336 24.00 1403 27.31 1468 30.73
17528 2800 873 6.70 918 8.08 962 9.49 1004 10.89 1084 13.77 1160 16.75 1232 19.81 1301 22.95 1367 26.17 1432 29.61 1494 33.11
18780 3000 929 8.02 972 9.52 1013 11.01 1053 12.51 1129 15.56 1202 18.73 1271 21.95 1337 25.23 1401 28.61 1463 32.10 1523 35.72
21284 3400 1041 11.17 1080 12.88 1117 14.57 1153 16.26 1223 19.70 1290 23.22 1353 26.73 1415 30.38 1474 34.05 1532 37.83 1588 41.65
23788 3800 1155 15.14 1190 17.04 1224 18.94 1257 20.84 1321 24.65 1382 28.47 1441 32.37 1499 36.38 1554 40.36 1608 44.45 1661 48.62
26292 4200 1270 20.01 1301 22.05 1332 24.14 1363 26.28 1422 30.48 1479 34.70 1534 38.95 1587 43.24 1640 47.68 1690 52.02 1740 56.54
CFM OV
15024 2400
16276 2600
17528 2800
18780 3000
20032 3200
21284 3400
22536 3600
23788 3800
25040 4000
26292 4200
28796 4600
31300 5000
10" SP
11" SP
RPM BHP RPM BHP
1529 33.02
1535 34.49 1605 38.71
1555 36.77 1616 40.63
1581 39.42 1638 43.25
1611 42.39 1666 46.33
1643 45.61 1697 49.71
1677 49.10 1729 53.27
1712 52.79 1763 57.12
1750 56.85 1799 61.29
1789 61.13 1836 65.67
1870 70.39 1915 75.31
1955 80.75 1998 86.04
MAXIMUM RPM:
Class I — 1143
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1676
1679
1695
1720
1749
1780
1812
1847
1883
1959
2040
43.27
44.85 1744 49.47 1810 54.43
47.29 1753 51.60 1812 56.20 1873 61.22 1935 66.58
50.39 1773 54.54 1827 58.98 1881 63.59 1937 68.59 1994 73.93 2052 79.59
53.84 1800 58.08 1850 62.40 1900 66.90 1951 71.67 2002 76.61 2055 81.96 2108 87.52 2163 93.54
57.55 1830 61.94 1878 66.31 1926 70.87 1974 75.59 2021 80.37 2069 85.42 2117 90.64 2167 96.28
61.45 1861 65.98 1909 70.60 1955 75.19 2001 79.95 2046 84.75 2091 89.72 2136 94.84 2181 100.11
65.79 1894 70.35 1940 74.99 1986 79.81 2031 84.70 2075 89.64 2118 94.61 2161 99.74 2203 104.88
70.35 1929 75.07 1974 79.85 2018 84.67 2062 89.67 2105 94.72 2148 99.95 2189 105.05 2230 110.31
80.27 2003 85.36 2045 90.32 2087 95.42 2129 100.67 2170 105.93 2211 111.36 2251 116.79 2290 122.24
91.33 2082 96.78 2122 102.09 2163 107.67 2202 113.06 2241 118.59 2280 124.24 2318 129.87 2355 135.47
Class II — 1475
Class III — 1871
Class IV — 2081
BC SWSI 365
Outlet Area - 7.66 ft2
Wheel Dia. - 36.50 inches
Tip Speed - 9.56 x RPM
Max. BHP = 19.42 (RPM÷1000)3
0.50" SP
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
CFM OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
6128 800 326 0.65 430 1.27
6894 900 342 0.76 435 1.41
7660 1000 359 0.89 445 1.58 527 2.37
9192 1200 397 1.20 472 1.99 543 2.86 610 3.77
10724 1400 439 1.60 505 2.48 567 3.41 628 4.44 744 6.63
12256 1600 483 2.09 542 3.07 598 4.09 653 5.20 758 7.57 859 10.14
13788 1800 529 2.70 582 3.77 633 4.89 683 6.08 779 8.62 871 11.33 961 14.26
15320 2000 577 3.46 625 4.61 671 5.82 717 7.09 805 9.79 890 12.68 972 15.70 1053 18.93
16852 2200 625 4.34 669 5.58 712 6.90 754 8.26 836 11.14 915 14.20 992 17.44 1066 20.75 1139 24.23 1215 28.13
18384 2400 674 5.38 715 6.73 754 8.11 793 9.58 869 12.62 943 15.85 1015 19.26 1085 22.79 1153 26.39 1221 30.22 1289 34.27
19916 2600 724 6.62 761 8.02 798 9.52 835 11.10 906 14.34 975 17.72 1042 21.26 1108 24.97 1173 28.83 1236 32.73 1298 36.75
21448 2800 774 8.03 809 9.54 843 11.10 877 12.75 944 16.20 1009 19.76 1073 23.51 1135 27.37 1196 31.37 1256 35.49 1315 39.71
22980 3000 824 9.62 857 11.24 889 12.89 921 14.63 984 18.27 1045 22.00 1106 25.94 1165 29.99 1222 34.09 1279 38.39 1336 42.89
26044 3400 926 13.52 955 15.32 984 17.18 1012 19.07 1068 23.06 1123 27.20 1177 31.44 1231 35.86 1283 40.32 1335 44.99 1386 49.74
29108 3800 1028 18.37 1054 20.35 1080 22.39 1106 24.51 1157 28.87 1206 33.33 1255 37.97 1304 42.75 1352 47.60 1399 52.51 1446 57.62
32172 4200 1131 24.32 1155 26.52 1179 28.79 1202 31.04 1248 35.72 1293 40.54 1338 45.58 1383 50.78 1427 56.00 1470 61.24 1514 66.76
CFM OV
18384 2400
19916 2600
21448 2800
22980 3000
24512 3200
26044 3400
27576 3600
29108 3800
30640 4000
32172 4200
35236 4600
38300 5000
10" SP
RPM BHP
1359 38.63
1361 41.06
1373 44.01
1391 47.35
1412 50.85
1436 54.56
1463 58.56
1492 62.79
1523 67.32
1556 72.18
1626 82.84
1701 94.86
MAXIMUM RPM:
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1424 45.55
1430 48.40 1489 53.19 1549 58.22
1445 51.88 1499 56.57 1553 61.45 1607 66.50 1664 72.04
1464 55.62 1515 60.42 1566 65.38 1616 70.37 1667 75.67 1718 81.13 1771 86.98
1486 59.55 1535 64.57 1584 69.73 1631 74.77 1679 80.10 1727 85.59 1774 91.09 1823 97.05 1872 103.10 1922 109.44
1511 63.73 1558 68.95 1605 74.31 1651 79.67 1696 85.02 1741 90.50 1786 96.12 1831 101.90 1876 107.83 1922 114.08
1538 68.13 1583 73.50 1628 79.02 1672 84.54 1716 90.20 1760 95.98 1803 101.73 1845 107.43 1888 113.45 1930 119.43
1567 72.79 1611 78.43 1654 84.09 1697 89.89 1739 95.68 1781 101.60 1822 107.46 1863 113.44 1904 119.54 1945 125.78
1599 77.92 1640 83.52 1682 89.43 1723 95.34 1764 101.38 1804 107.39 1844 113.53 1884 119.79 1924 126.17 1963 132.47
1666 88.90 1705 94.96 1743 101.01 1782 107.39 1820 113.74 1857 120.02 1895 126.64 1932 133.19 1969 139.86 2006 146.66
1738 101.23 1774 107.55 1811 114.19 1847 120.79 1882 127.34 1918 134.23 1953 141.06 1988 148.01 2022 154.86 2057 162.06
Class I — 995
Class II — 1283
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
23
Class III — 1727
Class IV — 1883
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Consult Factory = Bold face
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC SWSI 402
Outlet Area - 9.31 ft2
Wheel Dia. - 40.25 inches
Tip Speed - 10.54 x RPM
Max. BHP = 31.67 (RPM÷1000)3
0.50" SP
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
CFM OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
7448 800 296 0.79 390 1.55
8379 900 310 0.93 395 1.72
9310 1000 325 1.08 404 1.93 478 2.89
11172 1200 360 1.46 428 2.42 492 3.46 553 4.58
13034 1400 398 1.94 457 2.99 515 4.17 569 5.38 675 8.08
14896 1600 438 2.54 491 3.72 542 4.97 592 6.32 687 9.18 779 12.33
16758 1800 480 3.29 528 4.59 574 5.94 619 7.38 706 10.46 789 13.73 871 17.31
18620 2000 523 4.20 566 5.58 609 7.09 650 8.62 730 11.90 807 15.41 882 19.12 955 23.02
20482 2200 567 5.28 607 6.80 645 8.37 684 10.06 758 13.54 829 17.22 899 21.17 966 25.17 1033 29.47 1102 34.21
22344 2400 611 6.54 648 8.17 684 9.88 719 11.64 788 15.34 855 19.26 920 23.38 984 27.71 1046 32.13 1107 36.71 1169 41.67
24206 2600 656 8.03 690 9.75 724 11.59 757 13.49 821 17.40 884 21.53 945 25.85 1005 30.38 1064 35.08 1121 39.81 1177 44.66
26068 2800 702 9.76 733 11.57 765 13.53 795 15.49 856 19.70 915 24.03 973 28.58 1029 33.25 1084 38.08 1139 43.16 1192 48.21
27930 3000 747 11.69 777 13.66 806 15.67 835 17.78 892 22.20 948 26.79 1002 31.46 1056 36.42 1108 41.44 1160 46.70 1211 52.07
31654 3400 839 16.40 866 18.62 892 20.87 918 23.21 968 27.99 1018 33.04 1067 38.20 1116 43.57 1163 48.97 1210 54.62 1257 60.49
35378 3800 932 22.32 956 24.76 979 27.20 1003 29.81 1048 34.99 1093 40.46 1138 46.16 1182 51.92 1226 57.87 1269 63.91 1311 70.02
39102 4200 1025 29.52 1047 32.22 1068 34.90 1089 37.65 1131 43.35 1173 49.37 1213 55.38 1253 61.58 1293 67.93 1333 74.46 1372 81.01
CFM
22344
24206
26068
27930
29792
31654
33516
35378
37240
39102
42826
46550
OV
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
4600
5000
10" SP
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1233 47.03
1234 49.89 1292 55.45
1245 53.49 1297 58.86 1350 64.62 1404 70.67
1261 57.51 1310 63.01 1359 68.72 1408 74.65 1458 80.96 1509 87.57
1280 61.76 1327 67.53 1374 73.48 1420 79.46 1466 85.65 1512 92.05 1558 98.64 1606 105.73
1302 66.30 1347 72.31 1392 78.50 1436 84.70 1479 90.90 1522 97.27 1566 104.03 1609 110.79 1653 117.94 1698 125.42 1743 133.04
1327 71.25 1370 77.45 1413 83.85 1455 90.26 1497 96.83 1538 103.36 1579 110.06 1619 116.73 1660 123.78 1701 131.03 1743 138.69
1353 76.35 1394 82.71 1435 89.27 1476 96.01 1516 102.74 1556 109.63 1596 116.68 1634 123.44 1673 130.58 1712 137.90 1750 145.14
1381 81.83 1421 88.51 1460 95.19 1499 102.06 1538 109.10 1577 116.33 1615 123.50 1652 130.59 1690 138.05 1726 145.18 1763 152.70
1411 87.76 1449 94.54 1487 101.52 1525 108.68 1562 115.81 1599 123.11 1636 130.59 1672 137.98 1708 145.52 1744 153.19 1779 160.74
1474 100.63 1510 107.93 1545 115.21 1581 122.92 1615 130.35 1650 138.18 1684 145.94 1718 153.86 1752 161.94 1785 169.89 1819 178.28
1542 115.24 1576 123.08 1609 130.85 1642 138.78 1674 146.63 1706 154.66 1739 163.14 1770 171.21 1802 179.73 1833 188.10 1865 196.93
MAXIMUM RPM:
Class I — 903
Class II — 1163
Class III — 1566
Class IV — 1706
BC SWSI 445
Outlet Area - 11.39 ft2
Wheel Dia. - 44.50 inches
Max. BHP = 52.32 (RPM÷1000)3
CFM OV
9112 800
10251 900
11390 1000
13668 1200
15946 1400
18224 1600
20502 1800
22780 2000
25058 2200
27336 2400
29614 2600
31892 2800
34170 3000
38726 3400
43282 3800
47838 4200
0.50" SP
RPM BHP
268 0.97
280 1.13
294 1.32
325 1.78
360 2.38
396 3.10
434 4.02
473 5.13
513 6.46
553 8.01
594 9.84
635 11.94
676 14.31
760 20.14
844 27.38
928 36.19
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
352 1.88
357 2.10
365 2.36 432 3.52
387 2.95 445 4.24 501 5.62
414 3.68 466 5.10 515 6.59 611 9.90
444 4.54 491 6.10 536 7.75 621 11.21 705 15.11
478 5.62 520 7.30 560 9.02 639 12.81 714 16.82 788 21.18
513 6.87 551 8.67 588 10.54 661 14.59 730 18.85 798 23.40 864 28.18
549 8.30 584 10.26 619 12.32 686 16.58 750 21.07 813 25.87 874 30.81 935 36.12 996 41.75
586 9.97 619 12.09 651 14.28 713 18.77 774 23.61 833 28.67 890 33.88 946 39.27 1001 44.86 1057 50.91
625 11.96 655 14.17 685 16.51 743 21.30 800 26.37 855 31.63 909 37.14 962 42.84 1014 48.69 1065 54.68
664 14.20 692 16.54 720 19.01 774 24.06 828 29.41 880 34.93 931 40.69 981 46.64 1030 52.73 1079 59.10
703 16.71 730 19.23 756 21.80 807 27.15 858 32.80 907 38.54 955 44.50 1003 50.78 1050 57.22 1096 63.78
784 22.82 807 25.53 830 28.33 876 34.27 921 40.42 966 46.82 1010 53.36 1053 60.05 1095 66.87 1137 73.97
865 30.29 886 33.30 907 36.40 949 42.91 990 49.66 1030 56.54 1070 63.62 1109 70.76 1148 78.16 1186 85.65
948 39.50 967 42.79 986 46.15 1024 53.14 1061 60.34 1098 67.84 1134 75.40 1170 83.14 1206 91.09 1242 99.27
OV
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
4600
5000
10" SP
RPM BHP
1115 57.49
1116 60.99
1126 65.39
1141 70.41
1158 75.57
1178 81.14
1200 87.05
1224 93.39
1250 100.25
1277 107.47
1334 123.22
1396 141.24
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1168 67.72
1173 71.97 1221 79.01 1270 86.46
1185 77.08 1229 84.00 1274 91.40 1318 98.85 1364 106.91
1201 82.72 1243 89.90 1284 97.09 1326 104.75 1367 112.43 1409 120.59 1453 129.42
1219 88.55 1259 95.98 1299 103.61 1338 111.22 1377 119.04 1416 127.10 1455 135.41 1495 144.22 1535 153.16 1576 162.57
1239 94.66 1278 102.52 1316 110.36 1354 118.39 1391 126.36 1428 134.54 1465 142.93 1502 151.54 1539 160.39 1576 169.46
1262 101.40 1299 109.41 1335 117.38 1372 125.84 1408 134.23 1443 142.51 1479 151.27 1514 159.94 1548 168.48 1583 177.55
1286 108.39 1321 116.49 1357 125.09 1392 133.65 1426 142.12 1461 151.09 1495 159.93 1528 168.62 1562 177.82 1595 186.87
1311 115.68 1346 124.39 1380 133.05 1413 141.64 1447 150.75 1480 159.75 1513 168.94 1546 178.33 1578 187.53 1610 196.89
1366 132.00 1398 141.01 1430 150.26 1462 159.75 1493 169.13 1524 178.72 1554 188.14 1585 198.11 1615 207.90 1645 217.87
1426 150.61 1456 160.17 1485 169.59 1515 179.56 1544 189.41 1573 199.46 1602 209.72 1630 219.77 1659 230.41 1687 240.82
CFM
27336
29614
31892
34170
36448
38726
41004
43282
45560
47838
52394
56950
MAXIMUM RPM:
Class I — 817
Class II — 1052
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
24
Tip Speed - 11.65 x RPM
Class III — 1416
Class IV — 1545
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Consult Factory = Bold face
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC SWSI 490
Outlet Area - 13.80 ft2
CFM OV
11040 800
12420 900
13800 1000
16560 1200
19320 1400
22080 1600
24840 1800
27600 2000
30360 2200
33120 2400
35880 2600
38640 2800
41400 3000
46920 3400
52440 3800
57960 4200
CFM
33120
35880
38640
41400
44160
46920
49680
52440
55200
57960
63480
69000
OV
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
4600
5000
0.50" SP
RPM BHP
243 1.17
254 1.36
267 1.60
295 2.15
327 2.88
360 3.78
394 4.87
430 6.24
466 7.84
502 9.70
539 11.90
576 14.42
614 17.36
690 24.39
766 33.13
842 43.76
Wheel Dia. - 49.00 inches
Tip Speed - 12.83 x RPM
Max. BHP = 84.69 (RPM÷1000)3
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
320 2.29
324 2.54
332 2.87 392 4.26
351 3.56 404 5.13 455 6.82
376 4.46 423 6.18 468 8.01 554 11.94
403 5.50 446 7.40 486 9.35 564 13.59 640 18.28
433 6.77 472 8.84 509 10.97 580 15.51 648 20.34 716 25.71
465 8.28 500 10.49 534 12.78 600 17.67 663 22.85 724 28.28 785 34.19
498 10.03 530 12.41 562 14.92 623 20.10 681 25.53 739 31.44 794 37.38 849 43.75 905 50.68
532 12.08 562 14.65 591 17.29 648 22.81 703 28.63 756 34.69 808 41.03 859 47.58 909 54.35 960 61.71
567 14.46 595 17.20 621 19.92 674 25.74 726 31.90 776 38.28 825 44.93 874 51.99 921 59.03 967 66.24
602 17.14 628 20.01 653 22.95 703 29.18 751 35.53 799 42.32 845 49.24 891 56.55 936 64.04 979 71.43
638 20.21 662 23.21 686 26.37 733 32.94 778 39.59 823 46.61 867 53.89 911 61.59 953 69.24 995 77.23
711 27.56 733 30.97 754 34.39 795 41.47 836 48.93 877 56.71 917 64.64 956 72.73 994 80.96 1032 89.52
785 36.65 805 40.44 824 44.19 861 51.88 898 60.00 935 68.46 971 76.97 1007 85.76 1042 94.61 1077 103.81
860 47.74 878 51.85 895 55.88 929 64.24 963 73.04 997 82.22 1030 91.46 1063 100.93 1095 110.36 1127 120.06
10" SP
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1012 69.54
1013 73.80 1061 82.13
1022 79.12 1066 87.40 1109 95.79 1154 104.95
1036 85.29 1076 93.38 1116 101.77 1157 110.77 1197 119.81 1239 129.64
1052 91.69 1090 100.07 1129 109.01 1166 117.65 1204 126.88 1242 136.43 1280 146.28 1319 156.63
1070 98.41 1107 107.33 1144 116.53 1180 125.68 1215 134.76 1251 144.44 1286 154.06 1322 164.33 1358 174.89 1394 185.59 1432 197.30
1090 105.59 1125 114.68 1160 124.06 1195 133.72 1229 143.27 1263 153.07 1297 163.12 1330 173.05 1364 183.64 1397 194.10 1431 205.25
1111 113.04 1146 122.89 1179 132.39 1213 142.50 1246 152.54 1278 162.43 1311 172.93 1343 183.28 1374 193.44 1406 204.27 1438 215.35
1135 121.48 1167 131.09 1200 141.33 1232 151.51 1264 161.95 1295 172.26 1326 182.80 1357 193.55 1388 204.52 1418 215.27 1448 226.25
1159 130.06 1191 140.38 1222 150.65 1253 161.20 1283 171.62 1314 182.69 1344 193.61 1374 204.77 1403 215.68 1433 227.26 1462 238.58
1211 149.21 1241 160.21 1270 171.11 1298 181.89 1327 193.36 1355 204.64 1383 216.16 1411 227.93 1439 239.94 1466 251.66 1494 264.13
1267 170.93 1294 182.17 1322 194.07 1348 205.33 1375 217.29 1402 229.53 1428 241.55 1454 253.79 1480 266.26 1506 278.96 1532 291.90
MAXIMUM RPM:
Class I — 742
Class II — 956
Class III — 1286
Class IV — 1401
BC SWSI 542
Outlet Area - 16.92 ft2
CFM OV
13536 800
15228 900
16920 1000
20304 1200
23688 1400
27072 1600
30456 1800
33840 2000
37224 2200
40608 2400
43992 2600
47376 2800
50760 3000
57528 3400
64296 3800
71064 4200
CFM
40608
43992
47376
50760
54144
57528
60912
64296
67680
71064
77832
84600
0.50" SP
RPM BHP
220 1.44
230 1.68
241 1.95
267 2.65
295 3.52
325 4.62
356 5.97
388 7.62
421 9.62
454 11.94
487 14.61
521 17.75
555 21.33
623 29.87
692 40.63
761 53.74
Wheel Dia. - 54.25 inches
Max. BHP = 140.88 (RPM÷1000)3
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
289 2.80
293 3.13
300 3.52 354 5.22
317 4.37 365 6.29 411 8.36
339 5.44 382 7.57 423 9.83 501 14.69
364 6.74 403 9.08 439 11.46 510 16.72 578 22.41
392 8.35 426 10.81 460 13.46 524 19.02 586 25.03 646 31.42
420 10.15 452 12.90 482 15.63 542 21.66 599 28.03 654 34.68 709 41.92
450 12.32 479 15.24 507 18.22 562 24.55 616 31.44 667 38.46 717 45.80 767 53.67 817 62.03
481 14.85 508 18.00 534 21.22 585 27.92 635 35.10 683 42.56 730 50.34 776 58.36 821 66.62 867 75.63
512 17.71 537 21.03 561 24.43 609 31.59 656 39.14 701 46.94 746 55.27 789 63.63 832 72.41 873 81.08
544 21.03 567 24.50 590 28.16 635 35.77 679 43.68 722 51.95 764 60.54 805 69.38 845 78.39 885 87.79
577 24.87 598 28.46 620 32.38 662 40.36 703 48.59 744 57.28 784 66.29 822 75.26 861 84.95 899 94.77
643 33.91 662 37.95 681 42.14 719 51.02 756 60.20 792 69.48 828 79.16 863 89.01 898 99.31 932 109.69
709 44.92 727 49.54 744 54.11 778 63.67 812 73.79 845 84.06 877 94.33 910 105.27 941 115.91 973 127.34
777 58.57 793 63.54 809 68.65 840 78.99 870 89.58 900 100.61 930 111.99 960 123.67 989 135.27 1018 147.20
10" SP
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2400 914 85.24
2600 915 90.49 958 100.59
2800 924 97.28 962 106.86 1002 117.55 1042 128.54
3000 936 104.64 972 114.52 1008 124.77 1045 135.79 1082 147.22 1119 158.89
3200 950 112.33 985 122.86 1019 133.34 1053 144.16 1087 155.34 1122 167.35 1156 179.27 1191 191.86
3400 966 120.46 1000 131.62 1033 142.73 1065 153.72 1098 165.46 1130 177.10 1162 189.09 1194 201.43 1226 214.10 1260 228.02 1293 241.66
3600 984 129.23 1016 140.53 1048 152.20 1080 164.22 1111 176.08 1141 187.76 1171 199.72 1202 212.52 1232 225.13 1262 238.07 1293 251.91
3800 1004 138.78 1035 150.60 1065 162.33 1095 174.40 1125 186.79 1155 199.48 1184 211.93 1213 224.67 1241 237.13 1270 250.46 1299 264.11
4000 1025 148.84 1054 160.67 1084 173.31 1113 185.84 1141 198.17 1170 211.34 1198 224.27 1226 237.46 1254 250.92 1281 264.05 1308 277.44
4200 1047 159.50 1075 171.73 1104 184.80 1132 197.74 1159 210.46 1187 224.05 1214 237.38 1241 251.00 1268 264.89 1294 278.39 1320 292.13
4600 1094 183.00 1121 196.44 1147 209.70 1173 223.31 1199 237.27 1224 250.93 1250 265.52 1275 279.77 1300 294.30 1325 309.12 1349 323.49
5000 1145 209.85 1169 223.42 1194 237.84 1218 251.97 1242 266.39 1266 281.14 1290 296.22 1314 311.60 1337 326.56 1360 341.77 1384 358.02
MAXIMUM RPM:
Class I — 670
Class II — 863
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
25
Tip Speed - 14.20 x RPM
Class III — 1162
Class IV — 1260
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Consult Factory = Bold face
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC SWSI 600
Outlet Area - 20.70 ft2
CFM OV
16560 800
18630 900
20700 1000
24840 1200
28980 1400
33120 1600
37260 1800
41400 2000
45540 2200
49680 2400
53820 2600
57960 2800
62100 3000
70380 3400
78660 3800
86940 4200
0.50" SP
RPM BHP
199 1.77
208 2.06
218 2.39
241 3.23
267 4.32
294 5.66
322 7.31
351 9.34
380 11.70
410 14.55
440 17.83
471 21.71
502 26.12
563 36.48
626 49.78
688 65.71
Wheel Dia. - 60.00 inches
Tip Speed - 15.71 x RPM
Max. BHP = 233.14 (RPM÷1000)3
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
261 3.41
265 3.83
271 4.30 320 6.38
287 5.36 330 7.70 371 10.17
307 6.68 345 9.23 382 11.99 453 17.98
330 8.31 364 11.07 397 14.02 461 20.43 523 27.48
354 10.18 385 13.20 416 16.48 474 23.30 530 30.65 584 38.41
380 12.43 408 15.69 436 19.15 490 26.49 542 34.37 591 42.36 641 51.26
407 15.08 433 18.63 459 22.38 509 30.18 557 38.46 603 47.03 648 55.95 693 65.52 739 75.98
435 18.18 459 21.97 483 25.98 529 34.16 574 42.91 618 52.17 660 61.56 702 71.50 743 81.73
463 21.68 486 25.80 508 30.01 551 38.72 593 47.85 634 57.47 674 67.45 714 78.04 752 88.48
492 25.75 513 30.03 534 34.55 574 43.72 614 53.45 653 63.60 690 73.81 728 84.92 764 95.89
521 30.30 541 34.87 560 39.48 599 49.48 636 59.54 673 70.16 708 80.80 744 92.36 778 103.72
581 41.39 599 46.52 616 51.62 650 62.39 683 73.46 716 84.96 749 96.97 781 109.17 812 121.51
642 55.19 657 60.51 673 66.27 704 78.07 734 90.19 764 102.81 793 115.41 822 128.40 851 141.88
703 71.79 717 77.72 731 83.81 759 96.43 787 109.74 814 123.18 841 137.05 868 151.28 894 165.34
9" SP
RPM BHP
784 92.55
790 99.44
800 107.31
813 116.00
843 134.33
880 155.90
921 180.38
10" SP
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
CFM OV
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
49680 2400 827 104.51
53820 2600 828 110.97 866 122.97
57960 2800 835 118.81 870 130.82 906 143.82 942 157.18
62100 3000 846 127.87 879 140.17 912 152.93 945 166.19 978 179.94 1012 194.52
66240 3200 859 137.43 891 150.49 922 163.47 952 176.31 983 190.13 1014 204.44 1045 219.18 1077 234.81
70380 3400 874 147.65 904 160.92 934 174.60 963 188.08 992 201.94 1021 216.21 1050 230.89 1079 246.03 1109 262.27 1139 278.77 1169 295.57
74520 3600 890 158.24 919 172.12 948 186.44 976 200.58 1004 215.06 1032 229.92 1059 244.48 1086 259.41 1114 275.46 1141 291.20 1169 308.11
78660 3800 908 169.89 936 184.33 963 198.62 990 213.29 1017 228.37 1044 243.80 1070 258.87 1097 275.02 1122 290.03 1148 306.16 1174 322.67
82800 4000 927 182.20 953 196.54 980 211.93 1006 227.10 1032 242.66 1058 258.62 1083 274.20 1109 290.87 1134 307.09 1158 322.81 1183 339.70
86940 4200 947 195.31 972 210.08 998 225.92 1023 241.52 1048 257.50 1073 273.88 1098 290.65 1122 306.98 1146 323.62 1170 340.56 1194 357.82
95220 4600 989 223.74 1013 239.88 1037 256.45 1061 273.48 1084 290.16 1107 307.20 1130 324.61 1153 342.40 1175 359.63 1198 378.11 1220 395.99
103500 5000 1035 256.49 1057 273.32 1080 291.28 1101 307.98 1123 325.88 1145 344.20 1167 362.93 1188 381.10 1209 399.59 1230 418.41 1251 437.57
MAXIMUM RPM:
Class I — 606
Class II — 780
Class III — 1050
Class IV — 1146
BC SWSI 660
Outlet Area - 25.04 ft2
Wheel Dia. - 66.00 inches
Max. BHP = 375.47 (RPM÷1000)3
CFM OV
20040 800
22545 900
250501000
300601200
350701400
400801600
450901800
501002000
551102200
601202400
651302600
701402800
751503000
851703400
951903800
1052104200
0.50" SP
RPM BHP
181 2.14
189 2.49
198 2.89
219 3.90
243 5.24
267 6.83
293 8.87
319 11.29
346 14.23
373 17.64
400 21.57
428 26.23
456 31.52
512 44.18
569 60.20
626 79.72
CFM OV
60120 2400
65130 2600
70140 2800
75150 3000
80160 3200
85170 3400
90180 3600
95190 3800
100200 4000
105210 4200
115230 4600
125250 5000
10" SP
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
752 126.56
752 133.90 788 149.22
759 143.72 791 158.35 823 173.63 856 189.97
769 154.68 799 169.55 829 185.00 859 201.04 889 217.67 920 235.39
781 166.36 810 182.11 838 197.68 866 213.75 894 230.36 922 247.53 950 265.23 979 284.06
794 178.29 822 194.85 849 211.20 876 228.02 902 244.51 929 262.32 955 279.80 981 297.80 1008 317.20 1035 336.90 1063 357.95
809 191.41 836 208.68 862 225.74 887 242.49 913 260.47 938 278.06 963 296.09 988 314.60 1013 333.60 1038 353.12 1063 373.12
825 205.23 851 223.12 876 240.78 900 258.10 925 276.74 949 294.93 973 313.51 997 332.52 1020 350.96 1044 370.86 1068 391.26
843 220.68 867 238.35 891 256.52 915 275.21 938 293.46 962 313.12 985 332.26 1008 351.78 1031 371.70 1053 390.93 1075 410.55
861 236.40 884 254.51 907 273.13 930 292.24 953 311.85 975 330.94 998 351.51 1020 371.47 1042 391.81 1064 412.52 1085 432.44
899 270.64 921 290.34 943 310.58 964 330.36 985 350.61 1006 371.32 1027 392.48 1048 414.10 1068 434.94 1089 457.42 1109 479.05
941 310.45 961 330.81 981 351.57 1001 372.76 1021 394.42 1041 416.59 1061 439.27 1080 461.14 1099 483.39 1118 506.05 1137 529.09
MAXIMUM RPM:
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
238 4.17
241 4.64
246 5.18 291 7.73
261 6.50 300 9.31 338 12.39
279 8.08 314 11.20 347 14.47 412 21.78
300 10.06 331 13.41 361 16.98 419 24.71 475 33.15
322 12.34 350 15.98 378 19.91 431 28.22 481 36.90 531 46.51
346 15.12 371 19.00 397 23.28 445 31.96 492 41.41 538 51.46 583 62.12
370 18.24 394 22.60 417 27.02 462 36.34 506 46.44 548 56.85 589 67.67 630 79.28 672 92.02
395 21.92 417 26.53 439 31.42 481 41.36 522 51.97 561 62.86 600 74.50 638 86.45 675 98.70
421 26.24 442 31.26 462 36.36 501 46.87 539 57.87 576 69.41 613 81.73 649 94.39 684 107.24
447 31.10 467 36.48 485 41.69 522 52.96 558 64.61 593 76.71 628 89.62 661 102.38 695 116.26
474 36.75 492 42.24 510 48.03 544 59.69 578 71.97 611 84.56 644 97.93 676 111.57 708 125.90
528 50.03 544 56.12 560 62.45 591 75.52 621 88.92 651 102.84 681 117.38 710 132.10 738 146.92
583 66.56 598 73.48 612 80.26 640 94.46 667 109.00 694 124.11 721 139.69 748 155.82 774 171.91
639 86.82 652 94.12 665 101.61 690 116.68 715 132.52 740 149.05 765 166.13 789 182.98 813 200.26
Class I — 551
Class II — 710
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
26
Tip Speed - 17.28 x RPM
Class III — 955
9" SP
RPM BHP
713
718
727
739
767
800
837
112.13
120.24
129.71
140.32
162.95
188.64
218.05
Class IV — 1040
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Consult Factory = Bold face
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC SWSI 730
Outlet Area - 30.63 ft2
Wheel Dia. - 73.00 inches
Tip Speed - 19.11 x RPM
Max. BHP = 621.54 (RPM÷1000)3
CFM OV
24512 800
27576 900
30640 1000
36768 1200
42896 1400
49024 1600
55152 1800
61280 2000
67408 2200
73536 2400
79664 2600
85792 2800
91920 3000
104176 3400
116432 3800
128688 4200
0.50" SP
RPM BHP
163 2.59
171 3.05
179 3.53
198 4.77
219 6.35
242 8.42
265 10.87
288 13.75
313 17.44
337 21.54
362 26.47
387 32.10
412 38.49
463 54.09
514 73.46
566 97.54
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
215 5.09
218 5.69
223 6.38 263 9.44
236 7.95 271 11.36 305 15.07
252 9.85 284 13.72 314 17.75 372 26.54
271 12.27 299 16.36 326 20.70 379 30.27 430 40.71
291 15.07 317 19.65 342 24.41 389 34.34 435 45.17 480 56.86
312 18.35 336 23.37 359 28.50 403 39.29 445 50.71 486 62.79 527 75.95
335 22.42 356 27.60 377 33.06 418 44.56 457 56.63 496 69.78 533 83.01 570 97.19 607 112.25
357 26.79 377 32.46 397 38.46 435 50.64 472 63.60 508 77.25 543 91.40 577 105.85 610 120.57 644 136.76
381 32.20 399 38.07 417 44.26 453 57.36 487 70.66 521 85.02 554 99.86 586 115.01 618 130.92 649 146.98
404 38.01 422 44.56 439 51.18 472 64.81 505 79.28 536 93.77 567 109.18 598 125.48 628 141.98 657 158.46
429 45.10 445 51.74 461 58.72 492 73.10 523 88.27 553 103.78 582 119.65 611 136.37 640 153.93 668 171.54
478 61.45 492 68.73 506 76.27 534 92.22 562 109.10 589 126.09 615 143.11 642 161.67 667 179.54 693 198.95
527 81.39 540 89.57 553 98.02 578 115.18 603 133.32 628 152.23 652 171.01 676 190.39 700 210.51 723 230.49
578 106.37 589 114.87 601 124.17 624 142.86 647 162.55 669 182.31 691 202.67 713 223.53 735 244.96 757 267.03
CFM OV
73536 2400
79664 2600
85792 2800
91920 3000
98048 3200
104176 3400
110304 3600
116432 3800
122560 4000
128688 4200
140944 4600
153200 5000
10" SP
RPM BHP
680 154.88
680 163.87
686 175.64
695 189.00
706 203.41
718 218.23
732 234.71
746 251.17
762 269.79
778 288.71
813 331.35
851 380.10
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
712 182.20
715 193.58 744 212.32 774 232.44
722 207.08 749 225.84 776 245.32 804 266.51 832 288.16
732 222.47 758 242.15 783 261.51 808 281.50 833 302.15 859 324.54 885 347.32
743 238.19 768 258.78 792 278.93 816 299.64 839 319.83 863 341.76 887 364.36 911 387.57 936 412.42 961 437.75
755 254.43 779 275.79 802 296.69 825 318.11 848 340.07 871 362.62 893 384.49 915 406.92 938 431.31 961 456.32
769 272.53 792 294.55 814 316.08 836 338.17 858 360.78 880 383.90 901 406.23 923 430.44 944 453.81 965 477.73
784 291.73 805 313.15 827 336.35 848 358.92 869 382.05 890 405.70 911 429.84 932 454.49 952 478.17 972 502.33
799 311.08 820 334.09 841 357.73 861 380.68 882 405.53 902 429.57 922 454.13 942 479.17 962 504.67 981 529.05
833 355.60 852 379.17 872 404.75 891 429.57 910 454.94 929 480.88 947 505.76 966 532.75 984 558.58 1003 586.62
869 404.91 887 430.20 905 456.00 923 482.37 941 509.35 959 536.94 976 563.36 994 592.03 1011 619.43 1028 647.30
MAXIMUM RPM:
Class I — 498
Class II — 641
Class III — 863
Class IV — 940
BC SWSI 807
Outlet Area - 37.49 ft2
Wheel Dia. - 80.75 inches
Max. BHP = 1029.2 (RPM÷1000)3
0.50" SP
RPM BHP
148 3.21
154 3.69
162 4.34
179 5.84
198 7.78
218 10.19
239 13.20
261 16.95
283 21.34
305 26.45
327 32.31
350 39.33
373 47.30
419 66.39
465 90.08
511 118.88
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
194 6.19
197 6.95
201 7.74 238 11.59
213 9.68 245 13.90 276 18.50
228 12.08 257 16.84 284 21.75 336 32.39
245 15.02 270 19.95 295 25.41 342 36.83 388 49.53
263 18.43 286 23.90 309 29.82 352 42.14 393 55.17 434 69.61
282 22.44 303 28.38 324 34.69 364 47.95 402 61.92 439 76.64 476 92.68
302 27.20 322 33.83 341 40.51 378 54.57 414 69.73 448 85.15 482 101.66 515 118.71 549 137.54
323 32.86 341 39.78 359 47.10 393 61.84 426 77.44 459 94.38 491 111.91 521 129.05 552 147.96
344 39.25 361 46.69 377 54.16 409 69.91 441 86.90 471 104.03 501 122.32 530 140.92 559 160.46
366 46.80 381 54.31 397 62.69 427 79.47 456 96.66 485 115.05 513 133.92 541 153.88 568 173.97
387 54.83 402 63.17 416 71.46 445 89.58 472 107.45 500 127.04 526 146.28 553 167.44 578 187.78
432 75.13 445 84.22 458 93.67 483 113.02 508 133.45 532 153.87 556 175.13 580 197.42 603 219.70
477 99.95 488 109.48 500 119.99 523 141.32 545 163.02 567 185.56 589 208.79 611 232.83 632 256.58
522 129.76 533 140.97 543 151.66 564 174.70 585 199.00 605 223.31 625 248.37 645 274.06 665 300.46
CFM OV
89976 2400
97474 2600
104972 2800
112470 3000
119968 3200
127466 3400
134964 3600
142462 3800
149960 4000
157458 4200
172454 4600
187450 5000
10" SP
RPM BHP
614 188.82
615 200.76
620 214.74
629 232.03
638 248.60
649 266.92
661 286.22
675 308.15
689 330.31
703 352.77
735 405.48
769 464.51
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
644 223.28 647 237.55 673 260.26 700 284.76
653 253.72 677 276.19 702 300.78 727 326.31 752 352.38
662 272.52 685 295.97 708 320.18 731 345.21 753 369.63 777 397.78 800 424.87
672 291.85 694 316.24 716 341.31 737 365.62 759 392.15 780 417.89 802 446.04 824 474.97 846 504.33 869 536.05
683 311.95 704 337.11 725 362.98 746 389.51 767 416.74 787 443.01 807 469.94 828 499.38 848 527.78 869 558.79
695 333.18 716 360.43 736 386.95 756 414.17 776 442.04 795 468.78 815 497.92 834 525.89 853 554.50 872 583.77
708 355.82 728 383.58 748 412.17 767 439.84 786 468.19 805 497.18 824 526.77 842 555.01 861 585.83 879 615.24
723 381.72 741 408.30 760 437.23 779 466.94 797 495.54 816 526.72 834 556.64 852 587.15 869 616.08 887 647.67
753 435.01 771 465.35 788 494.67 805 524.67 822 555.32 840 588.73 856 618.60 873 651.22 890 684.49 907 718.41
786 496.21 802 526.64 818 557.67 835 591.47 851 623.93 867 657.09 883 690.90 898 722.96 914 758.01 930 793.72
MAXIMUM RPM:
Class I — 450
Class II — 579
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenance (accessories).
27
Tip Speed - 21.14 x RPM
CFM OV
29992 800
33741 900
37490 1000
44988 1200
52486 1400
59984 1600
67482 1800
74980 2000
82478 2200
89976 2400
97474 2600
104972 2800
112470 3000
127466 3400
142462 3800
157458 4200
Class III — 780
9" SP
RPM BHP
583 168.03
587 180.11
594 193.95
604 210.01
626 242.87
654 282.54
684 326.24
Class IV — 849
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Consult Factory = Bold face
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC SWSI 890
Outlet Area - 45.54 ft2
Wheel Dia. - 89.00 inches
Tip Speed - 23.30 x RPM
Max. BHP = 1662 (RPM÷1000)3
CFM OV
36432 800
40986 900
45540 1000
54648 1200
63756 1400
72864 1600
81972 1800
91080 2000
100188 2200
109296 2400
118404 2600
127512 2800
136620 3000
154836 3400
173052 3800
191268 4200
0.50" SP
RPM BHP
134 3.87
140 4.51
147 5.27
163 7.17
180 9.50
198 12.42
217 16.07
237 20.64
256 25.70
277 32.22
297 39.37
317 47.52
338 57.25
380 80.55
422 109.51
464 144.75
CFM OV
109296 2400
118404 2600
127512 2800
136620 3000
145728 3200
154836 3400
163944 3600
173052 3800
182160 4000
191268 4200
209484 4600
227700 5000
10" SP
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
557 229.27
558 243.89 584 270.80
563 261.52 587 288.52 611 316.74 635 345.72
570 280.83 593 309.03 615 336.74 637 365.50 659 395.29 682 427.50
579 302.21 600 330.00 621 358.66 642 388.27 663 418.89 684 450.58 705 483.25 726 516.44
589 324.50 609 353.29 630 384.76 649 413.40 669 444.77 689 477.10 708 508.28 728 542.59 747 575.54 768 613.63 788 650.05
600 348.16 620 379.51 639 410.00 658 441.35 677 473.48 696 506.44 714 538.04 732 570.41 751 606.02 769 640.14 788 677.63
612 373.54 631 405.55 649 436.56 668 470.52 686 503.29 704 536.81 722 571.10 739 603.74 757 639.61 774 673.76 792 711.37
625 401.00 643 433.51 661 466.99 678 499.22 696 534.53 713 568.40 730 603.02 747 638.31 764 674.34 781 711.12 797 745.91
638 428.87 656 463.74 673 497.51 690 532.17 707 567.72 723 601.67 740 638.90 756 674.34 773 713.18 789 749.96 805 787.41
667 492.86 683 527.98 699 564.01 715 601.02 731 638.98 746 675.12 762 714.79 777 752.46 792 790.85 807 829.95 823 872.93
698 564.96 713 602.43 728 640.65 743 679.70 757 716.79 772 757.59 786 796.29 801 838.82 815 879.00 829 919.89 843 961.47
MAXIMUM RPM:
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
176 7.52
179 8.48
183 9.50 216 14.08
193 11.71 223 17.05 250 22.36
207 14.71 233 20.41 258 26.52 305 39.40
222 18.17 245 24.25 268 30.98 311 45.05 352 60.15
239 22.49 260 29.20 280 36.08 319 51.01 357 67.25 394 84.70
256 27.30 275 34.51 294 42.16 330 58.11 365 75.38 399 93.59 432 112.68
274 33.04 292 41.03 309 49.03 343 66.32 375 84.28 407 103.84 437 123.22 467 143.96 498 166.96
293 39.90 309 48.14 325 56.84 357 75.39 387 94.43 416 114.27 445 135.50 473 157.06 501 179.92 529 204.16
312 47.63 327 56.44 342 65.76 371 84.87 400 105.46 427 126.07 455 149.02 481 171.32 507 194.71 532 218.06
332 56.82 346 66.16 360 76.03 387 96.22 414 117.65 440 139.72 465 162.22 491 187.09 515 210.90 539 235.68
352 67.11 365 76.91 378 87.19 403 108.21 429 131.22 453 153.66 478 178.55 501 202.51 525 228.87 548 255.10
392 91.30 403 101.74 415 113.34 438 137.08 461 162.20 483 187.28 505 213.43 526 239.50 547 266.73 568 295.07
432 120.75 443 133.21 454 146.10 474 171.11 495 198.66 515 226.15 535 254.49 554 282.28 574 312.64 593 342.56
474 158.02 483 170.62 493 184.61 512 212.58 530 240.69 549 271.39 567 301.61 585 332.56 603 364.34 621 397.08
Class I — 408
Class II — 526
Class III — 708
Class IV — 770
BC SWSI 982
Outlet Area - 55.50 ft2
Wheel Dia. - 98.25 inches
Max. BHP = 2744 (RPM÷1000)3
CFM OV
44400 800
49950 900
555001000
666001200
777001400
888001600
999001800
1110002000
1221002200
1332002400
1443002600
1554002800
1665003000
1887003400
2109003800
2331004200
0.50" SP
RPM BHP
121 4.67
127 5.52
133 6.40
147 8.62
163 11.57
179 15.04
197 19.72
214 24.91
232 31.36
250 38.83
269 47.96
288 58.43
306 69.64
344 97.97
382 133.17
420 176.01
1" SP
1.5" SP
2" SP
3" SP
4" SP
5" SP
6" SP
7" SP
8" SP
9" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
160 9.26
162 10.30
165 11.42 196 17.25
175 14.32 202 20.78 227 27.44
187 17.78 211 24.85 233 32.02 277 48.39
201 22.11 222 29.57 243 37.86 281 54.48 319 73.40
216 27.22 235 35.35 254 44.16 289 62.19 323 81.67 357 103.31
232 33.32 249 42.00 266 51.19 299 70.86 331 92.16 361 113.65 391 136.98
249 40.65 264 49.71 280 59.81 311 81.05 340 102.99 368 125.85 396 150.33 423 175.41 451 203.32
266 48.94 280 58.73 295 69.69 323 91.55 350 114.53 377 139.44 403 165.00 428 190.78 453 218.06 479 248.50
283 58.28 297 69.33 310 80.30 336 103.36 362 128.16 387 153.88 412 181.39 436 209.20 459 236.87 482 265.90
301 69.42 313 80.30 326 92.56 351 117.70 375 143.35 399 170.82 422 198.79 444 226.82 467 257.83 488 286.77
318 81.12 330 93.18 342 105.88 365 131.81 388 159.16 411 188.15 433 217.60 454 247.06 475 277.91 496 310.12
355 111.17 365 123.92 376 138.20 397 167.35 417 196.82 437 227.41 457 259.32 477 292.83 496 326.04 515 360.59
392 147.92 401 161.98 411 177.71 430 209.44 448 241.45 466 274.69 484 308.92 502 344.33 520 381.10 537 417.08
429 192.07 438 208.60 446 224.10 464 259.40 481 294.96 497 330.11 514 368.38 530 405.46 546 443.46 562 482.53
CFM OV
1332002400
1443002600
1554002800
1665003000
1776003200
1887003400
1998003600
2109003800
2220004000
2331004200
2553004600
2775005000
10" SP
RPM BHP
505 280.14
505 296.40
510 318.72
517 343.57
525 369.38
534 396.47
544 425.44
554 454.29
566 488.27
578 522.83
604 600.02
632 687.57
11" SP
12" SP
13" SP
14" SP
15" SP
16" SP
17" SP
18" SP
19" SP
20" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
529 329.99
531 350.16 553 385.02 575 420.86
537 376.26 557 410.16 577 445.37 597 481.84 618 521.52
544 403.25 563 438.18 582 474.26 600 509.02 619 547.52 638 587.20 658 630.40
552 431.33 570 467.21 588 504.06 606 541.99 624 581.07 641 618.45 659 659.87 677 702.43 695 745.60 714 792.84
561 460.96 579 500.08 596 537.73 613 576.28 630 615.81 647 656.37 663 694.89 680 737.59 697 781.47 714 826.48
571 492.70 588 532.31 605 573.11 621 612.12 638 655.07 654 695.91 670 737.67 685 776.99 701 820.65 717 865.36
582 527.05 598 566.92 614 607.89 630 649.95 646 693.11 662 737.31 677 779.04 692 821.55 707 864.91 722 909.16
594 564.47 609 604.40 625 648.42 640 690.45 655 733.47 670 777.46 685 822.43 700 868.30 715 915.05 729 958.78
619 644.38 633 686.72 648 733.52 662 778.08 676 823.61 690 870.12 704 917.61 718 966.07 731 1011.34 745 1061.62
646 734.60 659 779.11 673 828.15 686 874.57 699 921.99 712 970.41 725 1019.76 738 1070.05 751 1121.26 764 1173.41
MAXIMUM RPM:
Class I — 370
Class II — 476
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
28
Tip Speed - 25.72 x RPM
Class III — 641
Class IV — 698
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Consult Factory = Bold face
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC DWDI 122
Outlet Area - 1.55 ft2
CFM
OV
0.5" SP
Wheel Dia. - 12.25 inches
1" SP
1046
1153
1267
1393
1528
1670
1815
1964
2115
2268
2422
2578
2735
2893
3210
3529
MAXIMUM RPM:
0.15
0.21
0.28
0.37
0.48
0.63
0.80
1.00
1.24
1.52
1.84
2.20
2.62
3.08
4.18
5.53
1363
1417
1514
1622
1734
1854
1983
2118
2258
2400
2546
2694
2844
2995
3302
3613
Class I — 3196
Outlet Area - 1.89 ft2
OV
0.5" SP
MAXIMUM RPM:
1" SP
0.19
0.25
0.34
0.45
0.59
0.77
0.98
1.23
1.52
1.86
2.26
2.70
3.21
3.79
5.14
6.79
1238
1287
1377
1475
1577
1687
1805
1928
2055
2185
2318
2453
2589
2727
3007
3290
OV
8" SP
10" SP
12" SP
14" SP
Class III — 5500
2" SP
3" SP
4" SP
Selections above 4000 RPM not recommended. Consult factory.
Max. BHP = 0.221 (RPM÷1000)3
Tip Speed - 3.53 x RPM
5" SP
13.51
14.26
14.99
15.71
16.35
16.98
17.70
19.76
6" SP
8" SP
10" SP
12" SP
14" SP
Class I — 2904
0.5" SP
Class II — 3787
Class III — 4991
Wheel Dia. - 15.00 inches
1" SP
2" SP
3" SP
4" SP
16.45
17.35
18.25
19.13
19.91
20.67
21.57
24.10
Selections above 4000 RPM not recommended. Consult factory.
Max. BHP = 0.411 (RPM÷1000)3
Tip Speed - 3.93 x RPM
5" SP
4530
4554
4580
4608
4631
4658
4698
4840
6" SP
8" SP
10" SP
12" SP
14" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1864 800 843
2330 1000 926
2796 1200 1019
3262 1400 1121
3728 1600 1228
4194 1800 1338
4660 2000 1452
5126 2200 1568
5592 2400 1686
6058 2600 1805
6524 2800 1925
6990 3000 2047
7456 3200 2169
7922 3400 2292
8854 3800 2539
9786 4200 2789
MAXIMUM RPM:
0.24
0.32
0.43
0.57
0.75
0.96
1.21
1.51
1.86
2.27
2.74
3.29
3.90
4.58
6.20
8.19
1116
1153
1219
1303
1395
1493
1595
1702
1812
1923
2037
2153
2269
2387
2626
2868
0.49
0.59
0.72 1589 1.46
0.90 1627 1.65 1935 2.59
1.12 1687 1.90 1968 2.85 2232 3.96
1.36 1765 2.22 2014 3.17 2264 4.31 2497 5.55 2711 6.83
1.65 1852 2.60 2081 3.58 2306 4.70 2529 5.99 2740 7.38 1.99 1943 3.01 2160 4.07 2363 5.19 2569 6.47 2772 7.90 3147 10.96
2.39 2039 3.48 2246 4.63 2437 5.79 2623 7.06 2812 8.48 3177 11.67 3511 15.05
2.83 2139 4.01 2336 5.23 2519 6.48 2693 7.77 2864 9.16 3212 12.38 3539 15.94 3842 19.62
3.34 2241 4.59 2430 5.90 2606 7.23 2772 8.59 2932 9.99 3254 13.18 3571 16.81 3870 20.71 4148 24.66
3.92 2347 5.24 2527 6.62 2696 8.04 2857 9.49 3009 10.94 3307 14.10 3609 17.74 3901 21.75 4177 25.95
4.56 2455 5.97 2627 7.42 2790 8.92 2945 10.46 3092 11.99 3374 15.19 3655 18.80 3936 22.82 4207 27.16
5.29 2565 6.77 2730 8.30 2886 9.87 3035 11.48 3179 13.12 3449 16.42 3711 20.00 3979 24.03 4241 28.40
6.99 2790 8.61 2942 10.30 3087 12.03 3226 13.79 3360 15.58 3616 19.25 3856 22.95 4090 26.89 4328 31.25
9.05 3020 10.83 3162 12.66 3297 14.55 3427 16.47 3553 18.42 3793 22.39 4022 26.45 4239 30.53 4451 34.83
Class I — 2594
Class II — 3383
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
29
6" SP
0.38
0.45 1733 1.00 2095 1.61
0.57 1759 1.11 2120 1.81 2424 2.54
0.70 1814 1.26 2145 1.98 2450 2.80 2717 3.65 2961 4.54
0.87 1901 1.48 2182 2.17 2475 3.04 2743 3.97 2985 4.92
1.06 1997 1.74 2258 2.46 2507 3.27 2769 4.26 3012 5.31 3441 7.46
1.30 2096 2.02 2347 2.79 2574 3.62 2800 4.55 3036 5.64 3467 7.97 3846 10.39 4190 12.91
1.58 2197 2.34 2443 3.18 2660 4.04 2863 4.96 3069 5.99 3493 8.45 3871 11.02 4214 13.69
1.91 2304 2.71 2542 3.60 2753 4.53 2948 5.49 3132 6.49 3518 8.89 3898 11.64 4239 14.45
2.28 2417 3.12 2643 4.07 2850 5.06 3039 6.07 3216 7.11 3559 9.40 3922 12.19 4267 15.21
2.70 2535 3.60 2747 4.58 2950 5.64 3134 6.70 3306 7.80 3629 10.12 3954 12.77 4290 15.87
3.18 2657 4.14 2855 5.15 3051 6.26 3233 7.40 3401 8.55 3713 10.95 4008 13.53 4319 16.54
3.72 2782 4.74 2969 5.79 3154 6.94 3333 8.14 3499 9.36 3802 11.85 4086 14.49 4363 17.35
4.32 2910 5.41 3087 6.50 3261 7.68 3434 8.93 3598 10.22 3896 12.83 4171 15.55 4432 18.41
5.73 3171 6.94 3332 8.16 3490 9.40 3646 10.73 3801 12.13 4092 15.01 4355 17.92 4603 20.95
7.44 3440 8.78 3587 10.13 3731 11.47 3873 12.85 4014 14.32 4292 17.42 4551 20.62 4789 23.85
Outlet Area - 2.33 ft2
Class II — 4168
Wheel Dia. - 13.50 inches
BC DWDI 150
CFM
5" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1512 800 951
1890 1000 1048
2268 1200 1152
2646 1400 1267
3024 1600 1391
3402 1800 1520
3780 2000 1652
4158 2200 1788
4536 2400 1926
4914 2600 2065
5292 2800 2206
5670 3000 2348
6048 3200 2491
6426 3400 2635
7182 3800 2924
7938 4200 3215
4" SP
0.31
0.37 1910 0.82 2308 1.33
0.46 1938 0.91 2335 1.48 2671 2.09
0.58 1997 1.04 2363 1.63 2699 2.30 2994 3.00
0.71 2092 1.21 2402 1.78 2727 2.50 3022 3.26 3289 4.05
0.87 2196 1.42 2485 2.01 2761 2.68 3050 3.50 3318 4.36 3791 6.13
1.06 2305 1.66 2583 2.29 2833 2.96 3084 3.73 3345 4.64 3820 6.55 4237 8.53 4617 10.61
1.29 2417 1.92 2688 2.60 2927 3.31 3151 4.07 3381 4.93 3849 6.95 4265 9.05 4643 11.25 4991
1.56 2533 2.21 2796 2.95 3029 3.71 3244 4.50 3448 5.33 3875 7.30 4295 9.57 4671 11.87 5018
1.86 2657 2.55 2907 3.33 3136 4.14 3343 4.97 3540 5.83 3919 7.72 4321 10.02 4701 12.49 5046
2.20 2786 2.94 3020 3.75 3245 4.61 3448 5.49 3638 6.39 3994 8.29 4355 10.49 4727 13.04 5076
2.59 2920 3.38 3139 4.21 3355 5.12 3556 6.06 3742 7.00 4086 8.97 4412 11.09 4757 13.58 5102
3.03 3057 3.87 3264 4.73 3468 5.67 3666 6.66 3849 7.66 4184 9.71 4497 11.88 4805 14.24 5131
3.52 3197 4.41 3393 5.31 3586 6.28 3777 7.31 3958 8.37 4287 10.51 4590 12.74 4879 15.10 5174
4.67 3484 5.67 3662 6.66 3836 7.68 4008 8.77 4180 9.92 4501 12.28 4792 14.68 5065 17.16 5327
6.07 3778 7.16 3941 8.27 4100 9.36 4258 10.51 4414 11.71 4721 14.26 5006 16.88 5269 19.53
BC DWDI 135
CFM
3" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1240 800
1550 1000
1860 1200
2170 1400
2480 1600
2790 1800
3100 2000
3410 2200
3720 2400
4030 2600
4340 2800
4650 3000
4960 3200
5270 3400
5890 3800
6510 4200
2" SP
Max. BHP = 0.136 (RPM÷1000)3
Tip Speed - 3.21 x RPM
Class III — 4492
Selections above 4000 RPM not recommended. Consult factory.
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC DWDI 165
Outlet Area - 2.82 ft2
0.5" SP
Wheel Dia. - 16.50 inches
1" SP
2" SP
3" SP
4" SP
Max. BHP = 0.662 (RPM÷1000)3
Tip Speed - 4.32 x RPM
5" SP
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2256 800 767
2820 1000 842
3384 1200 927
3948 1400 1019
4512 1600 1116
5076 1800 1217
5640 2000 1320
6204 2200 1426
6768 2400 1533
7332 2600 1641
7896 2800 1751
8460 3000 1861
9024 3200 1972
9588 3400 2084
10716 3800 2309
11844 4200 2536
MAXIMUM RPM:
0.29
0.39
0.53
0.70
0.90
1.16
1.46
1.83
2.26
2.75
3.33
3.98
4.72
5.55
7.51
9.91
1015 0.60
1048 0.71
1108 0.88 1444 1.76
1185 1.10 1479 1.99 1759 3.13
1268 1.35 1534 2.30 1789 3.45 2029 4.79
1357 1.65 1605 2.69 1831 3.84 2058 5.21 2270 6.72 2465 8.27
1451 2.01 1684 3.15 1892 4.33 2096 5.69 2299 7.25 2491 8.93
1548 2.42 1767 3.65 1964 4.93 2149 6.29 2336 7.84 2520 9.56 2861 13.26
1647 2.89 1854 4.22 2042 5.60 2216 7.01 2385 8.55 2557 10.27 2888 14.11 3192 18.22
1749 3.43 1945 4.85 2124 6.33 2291 7.85 2448 9.40 2604 11.09 2920 14.99 3218 19.30 3493 23.75
1852 4.04 2038 5.56 2209 7.13 2369 8.75 2520 10.39 2666 12.10 2958 15.94 3247 20.36 3518 25.05
1957 4.74 2134 6.35 2298 8.02 2451 9.73 2597 11.48 2736 13.25 3006 17.06 3281 21.47 3546 26.31
2064 5.53 2232 7.22 2389 8.99 2536 10.79 2677 12.65 2811 14.51 3067 18.38 3323 22.75 3579 27.64
2171 6.41 2332 8.19 2482 10.05 2624 11.95 2760 13.90 2890 15.88 3136 19.88 3374 24.21 3617 29.07
2388 8.46 2537 10.43 2675 12.47 2807 14.56 2934 16.70 3055 18.86 3287 23.28 3506 27.78 3718 32.54
2608 10.95 2746 13.11 2875 15.33 2997 17.60 3116 19.93 3230 22.28 3449 27.11 3656 31.99 3854 36.96
Class I — 2358
BC DWDI 182
Outlet Area - 3.45 ft2
0.5" SP
Class II — 3075
Class III — 4083
Wheel Dia. - 18.25 inches
1" SP
2" SP
3" SP
4" SP
29.85
31.40
32.88 34.38
37.82
42.16
Selections above 4000 RPM not recommended. Consult factory.
Max. BHP = 1.11 (RPM÷1000)3
Tip Speed - 4.78 x RPM
5" SP
3771
3797
3825
3856
3935
4047
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2760 800 692 0.33
3450 1000 755 0.45
4140 1200 824 0.61
4830 1400 901 0.80
5520 1600 982 1.04
6210 1800 1067 1.33
6900 2000 1157 1.69
7590 2200 1249 2.12
8280 2400 1344 2.62
8970 2600 1439 3.21
9660 2800 1536 3.88
10350 3000 1634 4.66
11040 3200 1733 5.54
11730 3400 1832 6.53
13110 3800 2032 8.87
14490 4200 2233 11.73
MAXIMUM RPM:
888 0.64
938 0.81
1000 1.02 1270 1.91
1063 1.27 1323 2.26 1541 3.34
1131 1.56 1385 2.68 1587 3.83 1776 5.10
1204 1.90 1446 3.13 1647 4.41 1820 5.73 1988 7.17
1282 2.31 1510 3.64 1709 5.05 1877 6.47 2031 7.94 2183 9.55
1362 2.77 1578 4.21 1770 5.74 1939 7.29 2088 8.87 2227 10.49 2501 14.07
1447 3.32 1649 4.86 1833 6.48 2000 8.17 2150 9.89 2284 11.59 2539 15.24
1534 3.95 1723 5.58 1900 7.32 2062 9.11 2211 10.96 2346 12.81 2588 16.57 2822 20.68
1623 4.67 1801 6.40 1969 8.23 2126 10.14 2272 12.09 2408 14.10 2646 18.07 2866 22.25 3082 26.75
1715 5.49 1881 7.30 2041 9.24 2193 11.25 2335 13.32 2468 15.42 2708 19.70 2919 24.00 3123 28.57 3325
1808 6.41 1964 8.32 2116 10.35 2262 12.46 2400 14.64 2530 16.85 2770 21.41 2979 25.93 3174 30.62 3365
1903 7.45 2048 9.43 2194 11.57 2334 13.79 2467 16.05 2594 18.38 2831 23.18 3042 28.01 3232 32.87 3413
2095 9.88 2224 12.03 2356 14.36 2484 16.77 2609 19.26 2729 21.79 2955 27.01 3164 32.36 3356 37.79 3529
2290 12.83 2406 15.16 2524 17.64 2643 20.26 2759 22.96 2871 25.68 3087 31.33 3288 37.12 3478 43.07 3654
Class I — 2149
BC DWDI 200
Outlet Area - 4.14 ft2
0.5" SP
Class II — 2776
Class III — 3504
Wheel Dia. - 20.00 inches
1" SP
2" SP
3" SP
4" SP
Class IV — 3766
Max. BHP = 1.76 (RPM÷1000)3
Tip Speed - 5.24 x RPM
5" SP
33.48
35.58
37.88
43.15
49.04
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
3312 800 632 0.40 810 0.76
4140 1000 689 0.55 856 0.97
4968 1200 752 0.73 912 1.22 1158 2.29
5796 1400 821 0.96 970 1.52 1207 2.71 1406 4.01
6624 1600 895 1.24 1032 1.87 1263 3.21 1448 4.59 1621 6.12
7452 1800 973 1.60 1098 2.28 1319 3.75 1502 5.29 1660 6.87 1814 8.60
8280 2000 1055 2.03 1169 2.77 1377 4.36 1559 6.06 1712 7.76 1853 9.53 1992 11.46
9108 2200 1139 2.54 1243 3.33 1439 5.05 1614 6.87 1769 8.75 1904 10.63 2032 12.59 2282 16.88
9936 2400 1225 3.14 1319 3.98 1504 5.83 1672 7.78 1825 9.81 1961 11.86 2083 13.90 2317 18.30
10764 2600 1313 3.85 1399 4.74 1572 6.70 1733 8.78 1881 10.93 2017 13.15 2140 15.37 2361 19.89 2575 24.82
11592 2800 1401 4.66 1480 5.59 1643 7.68 1796 9.87 1939 12.15 2073 14.52 2196 16.90 2414 21.69 2614 26.68 2812 32.11
12420 3000 1490 5.59 1564 6.58 1716 8.77 1862 11.08 2000 13.49 2130 15.98 2252 18.52 2470 23.62 2663 28.79 2849 34.28
13248 3200 1580 6.64 1649 7.69 1791 9.97 1930 12.41 2063 14.94 2189 17.55 2308 20.22 2527 25.68 2718 31.13 2895 36.72
14076 3400 1670 7.82 1735 8.92 1868 11.31 2001 13.87 2129 16.54 2251 19.27 2366 22.05 2582 27.79 2775 33.61 2948 39.41
15732 3800 1853 10.63 1910 11.83 2028 14.42 2148 17.20 2266 20.12 2379 23.07 2489 26.13 2695 32.38 2887 38.85 3061 45.32
17388 4200 2036 14.06 2088 15.38 2194 18.17 2302 21.16 2411 24.31 2516 27.52 2619 30.81 2815 37.55 2999 44.51 3173 51.68
MAXIMUM RPM:
Class I — 1961
Class II — 2533
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
30
Class III — 3197
3033
3070
3113
3220
3333
40.15
42.70
45.43
51.80
58.82
Class IV — 3442
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC DWDI 222
Outlet Area - 5.12 ft2 0.5" SP
Wheel Dia. - 22.25 inches
1" SP
2" SP
3" SP
4" SP
Max. BHP = 3.00 (RPM÷1000)3
Tip Speed - 5.83 x RPM
5" SP
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
4096 800 568 0.50 728 0.95
5120 1000 619 0.67 769 1.20
6144 1200 676 0.90 820 1.52 1041 2.83
7168 1400 738 1.19 871 1.88 1085 3.36 1264 4.97
8192 1600 804 1.54 927 2.31 1135 3.97 1301 5.68 1457 7.58
9216 1800 875 1.98 987 2.82 1185 4.64 1350 6.54 1492 8.50 1630 10.64
10240 2000 948 2.50 1050 3.42 1237 5.39 1401 7.49 1539 9.60 1665 11.78 1790 14.17
11264 2200 1023 3.13 1116 4.11 1293 6.24 1451 8.51 1590 10.83 1711 13.14 1826 15.56 2051 20.88
12288 2400 1101 3.89 1185 4.92 1351 7.20 1502 9.61 1640 12.13 1762 14.65 1872 17.19 2082 22.62
13312 2600 1179 4.75 1256 5.84 1412 8.28 1557 10.85 1690 13.51 1813 16.27 1923 19.00 2122 24.60 2314 30.69
14336 2800 1258 5.75 1330 6.92 1476 9.49 1614 12.21 1742 15.02 1863 17.95 1974 20.91 2169 26.81 2350 33.02 2527 39.69
15360 3000 1338 6.89 1405 8.13 1542 10.84 1673 13.70 1797 16.67 1914 19.76 2024 22.91 2220 29.23 2393 35.60 2561 42.42 2726
16384 3200 1419 8.20 1481 9.49 1609 12.32 1734 15.34 1854 18.48 1967 21.70 2074 25.00 2271 31.76 2442 38.46 2602 45.42 2759
17408 3400 1500 9.66 1559 11.03 1678 13.97 1798 17.15 1913 20.44 2022 23.80 2126 27.25 2321 34.39 2494 41.57 2649 48.72 2798
19456 3800 1664 13.12 1716 14.62 1822 17.82 1930 21.26 2036 24.87 2138 28.54 2237 32.32 2422 40.04 2594 48.01 2751 56.05 2893
21504 4200 1829 17.37 1876 19.01 1971 22.45 2068 26.14 2166 30.04 2261 34.03 2353 38.08 2530 46.45 2695 55.04 2851 63.87 2996
MAXIMUM RPM:
Class I — 1762
BC DWDI 245
Outlet Area - 6.21 ft2
0.5" SP
Class II — 2277
Class III — 2874
Wheel Dia. - 24.50 inches
1" SP
2" SP
3" SP
4" SP
Class IV — 3088
Max. BHP = 4.85 (RPM÷1000)3
Tip Speed - 6.41 x RPM
5" SP
49.66
52.80
56.20
64.01
72.79
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
4968 800 516 0.60 661 1.15
6210 1000 562 0.82 699 1.46
7452 1200 614 1.09 745 1.84 946 3.44
8694 1400 670 1.44 791 2.28 985 4.06 1148 6.03
9936 1600 731 1.87 842 2.80 1031 4.81 1182 6.89 1323 9.18
11178 1800 794 2.39 896 3.42 1077 5.64 1226 7.93 1355 10.30 1481 12.91
12420 2000 861 3.04 954 4.15 1124 6.54 1272 9.08 1398 11.65 1513 14.31 1626 17.19
13662 2200 930 3.81 1014 4.99 1175 7.58 1318 10.32 1444 13.13 1554 15.93 1659 18.90 1863 25.34
14904 2400 1000 4.71 1077 5.98 1227 8.73 1365 11.67 1489 14.70 1601 17.80 1701 20.88 1891 27.44
16146 2600 1071 5.76 1141 7.09 1283 10.05 1414 13.15 1535 16.39 1646 19.71 1747 23.06 1927 29.82 2102 37.24
17388 2800 1143 6.98 1208 8.39 1341 11.52 1466 14.81 1583 18.24 1692 21.77 1793 25.37 1970 32.51 2134 40.03 2295 48.14
18630 3000 1216 8.37 1276 9.86 1400 13.13 1520 16.63 1633 20.25 1738 23.95 1838 27.77 2016 35.43 2174 43.21 2326 51.45 2476
19872 3200 1289 9.94 1346 11.53 1461 14.93 1575 18.60 1684 22.41 1786 26.30 1884 30.34 2062 38.49 2218 46.66 2363 55.07 2506
21114 3400 1363 11.73 1416 13.38 1524 16.94 1633 20.80 1737 24.78 1837 28.89 1931 33.06 2108 41.71 2265 50.41 2406 59.10 2541
23598 3800 1512 15.94 1559 17.75 1655 21.62 1753 25.79 1849 30.15 1942 34.62 2032 39.21 2200 48.58 2356 58.23 2499 68.02 2628
26082 4200 1661 21.06 1704 23.06 1790 27.22 1878 31.69 1967 36.42 2053 41.24 2137 46.18 2298 56.35 2448 66.78 2590 77.52 2721
MAXIMUM RPM:
Class I — 1601
BC DWDI 270
Outlet Area - 7.54 ft2
0.5" SP
Class II — 2068
Class III — 2610
Wheel Dia. - 27.00 inches
1" SP
2" SP
3" SP
4" SP
Class IV — 2808
Max. BHP = 8.10 (RPM÷1000)3
Tip Speed - 7.07 x RPM
5" SP
60.25
64.06
68.14
77.68
88.28
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
6032 800 447 0.68 588 1.33
7540 1000 488 0.92 611 1.66
9048 1200 537 1.24 645 2.06 836 3.96
10556 1400 590 1.64 687 2.56 861 4.63 1019 6.98
12064 1600 646 2.14 735 3.17 895 5.44 1038 7.88 1175 10.64
13572 1800 705 2.76 786 3.89 933 6.32 1069 9.03 1193 11.83 1315 14.96
15080 2000 765 3.51 839 4.73 976 7.35 1103 10.23 1221 13.26 1332 16.42 1442 19.89
16588 2200 828 4.41 895 5.71 1023 8.54 1142 11.58 1254 14.84 1360 18.21 1461 21.71
18096 2400 891 5.47 953 6.86 1073 9.90 1185 13.11 1291 16.55 1392 20.14 1488 23.81 1672 31.65
19604 2600 956 6.72 1013 8.19 1126 11.45 1231 14.83 1331 18.41 1428 22.23 1520 26.13 1694 34.20 1863 43.05
21112 2800 1021 8.15 1074 9.71 1179 13.12 1279 16.73 1374 20.47 1466 24.44 1555 28.59 1723 37.12 1881 46.01 2037 55.75
22620 3000 1087 9.80 1136 11.43 1235 15.04 1330 18.86 1420 22.77 1508 26.91 1593 31.22 1755 40.21 1907 49.46 2054 59.27 2199
24128 3200 1153 11.66 1199 13.38 1292 17.15 1383 21.21 1469 25.33 1552 29.58 1633 34.03 1790 43.49 1937 53.19 2077 63.17 2214
25636 3400 1219 13.74 1263 15.58 1350 19.49 1437 23.77 1519 28.08 1599 32.54 1677 37.18 1827 46.92 1970 57.13 2105 67.47 2236
28652 3800 1353 18.71 1392 20.71 1469 24.91 1548 29.56 1625 34.40 1698 39.23 1770 44.21 1908 54.51 2042 65.51 2171 76.92 2294
31668 4200 1487 24.75 1523 26.98 1593 31.54 1664 36.47 1734 41.65 1803 47.00 1870 52.41 1999 63.45 2123 74.97 2244 87.10 2362
MAXIMUM RPM:
Class I — 1392
Class II — 1830
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
31
Class III — 2267
69.82
73.77
78.23
88.47
99.71
Class IV — 2544
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC DWDI 300
Outlet Area - 9.31 ft2
0.5" SP
Wheel Dia. - 30.00 inches
1" SP
2" SP
3" SP
4" SP
Max. BHP = 13.72 (RPM÷1000)3
Tip Speed - 7.85 x RPM
5" SP
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
7448 800 403 0.84 529 1.64
9310 1000 439 1.13 550 2.05
11172 1200 483 1.53 581 2.55 752 4.88
13034 1400 531 2.03 618 3.15 775 5.72 917 8.61
14896 1600 581 2.64 661 3.91 805 6.70 935 9.76 1058 13.15
16758 1800 634 3.40 707 4.80 840 7.81 962 11.14 1074 14.62 1183 18.45
18620 2000 689 4.34 756 5.86 879 9.09 993 12.64 1099 16.38 1199 20.28 1298 24.57
20482 2200 745 5.45 806 7.06 921 10.55 1028 14.31 1129 18.34 1224 22.49 1315 26.80 1493 36.36
22344 2400 802 6.75 858 8.47 966 12.23 1066 16.17 1162 20.44 1253 24.88 1339 29.39 1505 39.09
24206 2600 860 8.29 912 10.12 1013 14.12 1108 18.32 1198 22.74 1285 27.44 1368 32.26 1525 42.25 1677 53.19
26068 2800 919 10.07 966 11.96 1062 16.24 1151 20.65 1237 25.30 1320 30.22 1400 35.33 1551 45.86 1693 56.82 1834 68.91
27930 3000 978 12.09 1022 14.09 1111 18.54 1197 23.28 1279 28.17 1357 33.21 1434 38.57 1580 49.70 1716 61.04 1848 73.11 1979 86.19
29792 3200 1037 14.37 1079 16.51 1163 21.19 1245 26.21 1322 31.26 1397 36.53 1470 42.04 1611 53.69 1743 65.63 1869 77.95 1993 91.13
31654 3400 1097 16.96 1136 19.19 1215 24.06 1293 29.32 1368 34.74 1439 40.17 1509 45.87 1644 57.90 1773 70.53 1895 83.36 2013 96.67
35378 3800 1218 23.11 1253 25.58 1323 30.82 1393 36.48 1462 42.43 1529 48.50 1593 54.59 1718 67.39 1838 80.90 1954 94.99 2065 109.29
39102 4200 1339 30.61 1371 33.33 1434 38.96 1497 44.97 1561 51.45 1623 58.05 1683 64.70 1799 78.32 1911 92.60 2020 107.59 2125 122.97
MAXIMUM RPM:
Class I — 1253
BC DWDI 330
Outlet Area - 11.27 ft2
0.5" SP
Class II — 1647
Class III — 2040
Wheel Dia. - 33.00 inches
1" SP
2" SP
3" SP
4" SP
Class IV — 2290
Max. BHP = 22.10 (RPM÷1000)3
Tip Speed - 8.64 x RPM
5" SP
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
9016 800 366 1.01 481 1.99
11270 1000 399 1.37 500 2.48
13524 1200 439 1.85 528 3.09 684 5.91
15778 1400 483 2.46 562 3.82 705 6.94 834 10.44
18032 1600 529 3.21 601 4.73 732 8.11 850 11.81 962 15.93
20286 1800 577 4.13 643 5.82 764 9.46 874 13.46 976 17.67 1076 22.37
22540 2000 627 5.26 687 7.08 799 10.99 903 15.31 999 19.82 1090 24.54 1180 29.73
24794 2200 678 6.61 733 8.56 838 12.80 935 17.34 1027 22.23 1113 27.23 1195 32.40 1357 43.98
27048 2400 730 8.20 780 10.25 878 14.79 969 19.56 1056 24.70 1139 30.10 1218 35.63 1368 47.29
29302 2600 782 10.03 829 12.24 921 17.09 1007 22.15 1089 27.51 1168 33.19 1244 39.08 1386 51.10 1524 64.30
31556 2800 836 12.21 879 14.51 965 19.63 1047 25.03 1125 30.65 1200 36.56 1273 42.78 1410 55.50 1539 68.75 1667 83.36
33810 3000 889 14.62 930 17.10 1011 22.50 1089 28.24 1163 34.11 1234 40.22 1303 46.61 1436 60.10 1560 73.87 1680 88.48 1799
36064 3200 944 17.46 981 19.99 1057 25.62 1132 31.73 1202 37.85 1270 44.21 1337 50.94 1465 65.04 1585 79.50 1700 94.49 1812
38318 3400 998 20.57 1034 23.31 1105 29.15 1176 35.53 1244 42.07 1309 48.70 1372 55.53 1495 70.12 1612 85.38 1723 100.93 1830
42826 3800 1107 27.95 1139 30.94 1203 37.31 1267 44.20 1330 51.44 1390 58.69 1449 66.16 1562 81.58 1671 97.91 1776 114.88 1877
47334 4200 1218 37.10 1246 40.29 1304 47.18 1362 54.55 1420 62.38 1476 70.32 1531 78.44 1636 94.87 1738 112.19 1837 130.34 1933
MAXIMUM RPM:
Class I — 1139
BC DWDI 365
Outlet Area - 13.79 ft2
0.5" SP
Class II — 1497
Class III — 1855 Wheel Dia. - 36.50 inches
1" SP
2" SP
3" SP
4" SP
Class IV — 2081
Max. BHP = 38.41 (RPM÷1000)3
Tip Speed - 9.65 x RPM
5" SP
104.30
110.33
117.00
132.20
149.08
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
11032 800 326 1.22
13790 1000 353 1.64 447 2.96
16548 1200 388 2.22 469 3.70 616 7.02
19306 1400 426 2.93 498 4.60 630 8.25
22064 1600 466 3.81 531 5.66 652 9.75 762 14.00
24822 1800 508 4.89 567 6.93 677 11.32 780 16.08 876 20.92
27580 2000 552 6.22 606 8.44 707 13.18 803 18.35 893 23.63 978 29.01
30338 2200 597 7.80 646 10.17 740 15.29 829 20.78 915 26.65 995 32.38 1072 38.30
33096 2400 643 9.69 688 12.20 775 17.67 858 23.47 939 29.72 1016 36.09 1089 42.34 1231 55.99
35854 2600 690 11.90 731 14.53 813 20.42 890 26.50 966 33.06 1039 39.85 1110 46.82 1243 60.57 1374 76.30
38612 2800 736 14.38 775 17.22 851 23.38 925 29.96 995 36.67 1065 43.90 1132 51.23 1260 65.98 1382 81.34 41370 3000 784 17.31 820 20.28 891 26.74 961 33.70 1028 40.84 1093 48.22 1157 55.94 1281 71.94 1397 87.68 1510 104.66
44128 3200 831 20.54 865 23.69 932 30.46 998 37.77 1062 45.30 1124 53.04 1185 61.10 1304 78.00 1416 94.82 1523 111.76
46886 3400 879 24.23 911 27.55 974 34.60 1037 42.32 1098 50.24 1156 58.16 1214 66.50 1328 84.12 1437 102.21 1541 120.10
52402 3800 976 33.01 1004 36.59 1060 44.20 1117 52.56 1173 61.31 1227 70.11 1280 79.11 1383 97.72 1485 117.61 1583 137.84
57918 4200 1073 43.69 1098 47.57 1149 55.84 1200 64.67 1252 74.23 1302 83.86 1351 93.61 1446 113.51 1539 134.34 1631 156.25
MAXIMUM RPM:
Class I — 1015
Class II — 1302
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
32
Class III — 1651
1629
1641
1677
1721
130.38
138.38
157.82
178.78
Class IV — 1883
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC DWDI 402
Outlet Area - 16.77 ft2
0.5" SP
Wheel Dia. - 40.25 inches
1" SP
2" SP
3" SP
4" SP
Max. BHP = 62.63 (RPM÷1000)3
Tip Speed - 10.54 x RPM
5" SP
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
13416 800
16770 1000
20124 1200
23478 1400
26832 1600
30186 1800
33540 2000
36894 2200
40248 2400
43602 2600
46956 2800
50310 3000
53664 3200
57018 3400
63726 3800
70434 4200
296 1.49
321 2.01 405 3.59
352 2.70 426 4.53 558 8.50
386 3.56 451 5.57 571 10.01
423 4.64 481 6.86 591 11.84 691 17.02
461 5.95 514 8.41 614 13.78 708 19.60 794 25.41
501 7.58 549 10.23 641 16.01 728 22.30 810 28.75 887 35.29
542 9.52 586 12.37 671 18.59 752 25.30 829 32.32 902 39.33 973 46.70
583 11.77 624 14.84 703 21.50 778 28.53 851 36.08 921 43.84 987 51.41 1116 68.03
625 14.43 663 17.68 737 24.81 807 32.22 876 40.21 942 48.43 1006 56.84 1127 73.62 1246 92.79
668 17.53 703 20.95 772 28.46 838 36.32 903 44.69 966 53.42 1027 62.38 1143 80.32 1253 98.85
711 21.05 743 24.60 808 32.51 871 40.92 932 49.62 991 58.61 1050 68.18 1162 87.56 1267 106.66 1370 127.46
754 25.02 784 28.76 845 37.02 905 45.93 963 55.08 1019 64.45 1074 74.18 1182 94.74 1284 115.29 1381 135.87
797 29.45 826 33.48 883 42.04 940 51.40 995 60.96 1049 70.86 1101 80.89 1204 102.23 1303 124.25 1397 145.92
885 40.13 910 44.43 962 53.87 1013 63.93 1064 74.61 1113 85.33 1161 96.27 1254 118.79 1346 142.82 1435 167.44
973 53.13 996 57.90 1042 67.91 1089 78.81 1135 90.18 1181 102.05 1225 113.80 1311 137.94 1396 163.49 1479 189.99
MAXIMUM RPM:
Class I — 920
BC DWDI 445
Outlet Area - 20.49 ft2
0.5" SP
Class II — 1181
Class III — 1497
Wheel Dia. - 44.50 inches
1" SP
2" SP
3" SP
4" SP
158.80
168.24
191.64
217.13
Class IV — 1706
Max. BHP = 103.5 (RPM÷1000)3
Tip Speed - 11.65 x RPM
5" SP
1478
1488
1520
1560
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
16392 800
20490 1000
24588 1200
28686 1400
32784 1600
36882 1800
40980 2000
45078 2200
49176 2400
53274 2600
57372 2800
61470 3000
65568 3200
69666 3400
77862 3800
86058 4200
267 1.80
290 2.45 366 4.38
318 3.29 385 5.52 505 10.41
349 4.34 408 6.81 517 12.28
382 5.65 435 8.39 535 14.51 625 20.80
417 7.28 465 10.29 556 16.89 640 23.92 718 31.03
453 9.25 497 12.54 580 19.59 659 27.32 732 35.04 803 43.24
490 11.62 530 15.12 607 22.73 680 30.89 750 39.53 816 48.09 880 57.05
527 14.37 564 18.10 636 26.30 704 34.92 770 44.14 833 53.57 893 62.88 1010 83.27
565 17.61 599 21.54 666 30.24 730 39.39 792 49.08 852 59.18 910 69.48 1019 89.87 1127 113.39
604 21.41 635 25.51 698 34.75 758 44.40 816 54.47 873 65.13 929 76.26 1034 98.20 1133 120.69
643 25.72 672 30.07 731 39.77 788 50.05 843 60.65 896 71.55 949 83.14 1051 107.00 1146 130.35 1239 155.70
682 30.58 709 35.14 764 45.20 819 56.23 871 67.32 922 78.85 972 90.83 1069 115.74 1161 140.75 1249 166.00 1337
721 36.02 747 40.91 799 51.46 850 62.78 900 74.52 948 86.39 996 98.91 1089 124.94 1179 152.02 1263 178.08 1346
800 48.96 823 54.29 869 65.60 916 78.08 962 91.09 1006 104.08 1049 117.29 1134 145.09 1218 174.79 1298 204.66 1375
879 64.70 901 70.80 942 82.89 984 96.05 1026 110.04 1068 124.67 1108 139.10 1186 168.69 1262 199.51 1338 232.33 1411
MAXIMUM RPM:
Class I — 832
BC DWDI 490
Outlet Area - 24.85 ft2
0.5" SP
Class II — 1068
Class III — 1354 Wheel Dia. - 49.00 inches
1" SP
2" SP
3" SP
4" SP
Class IV — 1545
Max. BHP = 167.5 (RPM÷1000)3
Tip Speed - 12.83 x RPM
5" SP
194.13
205.64
234.28
265.35
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
19880 800
24850 1000
29820 1200
34790 1400
39760 1600
44730 1800
49700 2000
54670 2200
59640 2400
64610 2600
69580 2800
74550 3000
79520 3200
84490 3400
94430 3800
104370 4200
243 2.20
263 2.96 333 5.34
289 3.99 350 6.71 459 12.65
317 5.27 371 8.29 469 14.84
347 6.86 395 10.16 486 17.61 567 25.14
379 8.85 423 12.54 505 20.49 581 28.97 652 37.62
411 11.19 451 15.17 527 23.79 598 33.05 665 42.54 729 52.38
445 14.09 481 18.30 551 27.52 617 37.36 681 47.90 741 58.31 799 69.14
479 17.46 512 21.92 578 31.95 639 42.27 699 53.46 757 65.09 811 76.25 917 100.90 514 21.46 544 26.12 605 36.69 663 47.77 719 59.45 774 71.83 826 84.12 926 109.19 1024 137.70
549 26.02 577 30.98 634 42.15 689 53.98 741 66.03 793 79.02 844 92.57 939 119.07 1029 146.38
584 31.19 610 36.40 664 48.25 716 60.78 765 73.38 814 86.85 862 100.87 954 129.56 1040 157.72 1125 188.71
619 37.01 644 42.62 694 54.84 744 68.24 791 81.62 837 95.50 882 109.86 971 140.42 1055 170.98 1135 201.68 1214 235.29
655 43.72 678 49.51 725 62.23 772 76.13 818 90.58 861 104.77 905 120.12 989 151.50 1071 184.49 1147 215.94 1222 249.14
727 59.48 748 65.98 790 79.78 832 94.71 874 110.58 914 126.35 953 142.37 1030 176.00 1106 211.86 1179 248.30 1249 284.28
799 78.66 818 85.76 856 100.68 894 116.59 932 133.51 970 151.20 1006 168.53 1077 204.50 1147 242.48 1215 281.64 1282 322.21
MAXIMUM RPM:
Class I — 748
Class II — 966
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
33
Class III — 1222
Class IV — 1401
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC DWDI 542
Outlet Area - 30.46 ft2
0.5" SP
24368 800
30460 1000
36552 1200
42644 1400
48736 1600
54828 1800
60920 2000
67012 2200
73104 2400
79196 2600
85288 2800
91380 3000
97472 3200
103564 3400
115748 3800
127932 4200
219 2.68
238 3.65
261 4.89
286 6.44
314 8.45
342 10.81
372 13.80
402 17.28
433 21.46
464 26.26
495 31.73
527 38.13
559 45.34
591 53.24
656 72.70
722 96.55
Wheel Dia. - 54.25 inches
1" SP
2" SP
3" SP
4" SP
Max. BHP = 278.6 (RPM÷1000)3
Tip Speed - 14.20 x RPM
5" SP
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
MAXIMUM RPM:
300 6.50
316 8.22 414 15.45
335 10.15 424 18.24
357 12.48 439 21.59 512 30.80
382 15.36 456 25.10 525 35.55 589 46.13
408 18.68 476 29.16 540 40.48 601 52.23 658 64.07
435 22.51 498 33.80 558 45.97 615 58.69 669 71.38 722 84.86
463 26.96 522 39.15 577 51.77 632 65.73 683 79.53 733 93.65 828 123.57
492 32.14 547 45.11 599 58.60 650 73.06 699 88.01 747 103.50 836 133.65 925 168.84
521 37.94 573 51.77 622 66.07 670 81.20 716 96.75 762 113.33 848 145.88 930 179.77
551 44.63 600 59.22 646 74.26 691 89.95 735 106.36 779 123.85 862 158.98 940 193.73 1016 231.22
582 52.33 627 67.28 672 83.64 714 99.86 756 117.06 797 134.84 877 172.11 953 209.65 1025 247.09 1096
613 60.88 655 76.33 698 93.61 738 110.65 778 128.59 817 147.01 894 186.15 967 225.89 1036 264.69 1104
675 80.06 713 97.56 751 115.87 789 135.33 825 154.57 861 174.64 931 216.21 999 259.71 1065 304.44 1128
739 105.19 773 123.33 808 143.19 842 163.77 876 185.25 909 206.82 973 250.84 1036 297.22 1098 345.77 1158
Class I — 676
BC DWDI 600
Outlet Area - 37.26 ft2
0.5" SP
Class II — 872
Class III — 1104
Wheel Dia. - 60.00 inches
1" SP
2" SP
3" SP
4" SP
Class IV — 1260
Max. BHP = 461.0 (RPM÷1000)3
Tip Speed - 15.71 x RPM
5" SP
288.00
305.60
348.34
395.01
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
29808 800
37260 1000
44712 1200
52164 1400
59616 1600
67068 1800
74520 2000
81972 2200
89424 2400
96876 2600
104328 2800
111780 3000
119232 3200
126684 3400
141588 3800
156492 4200
198 3.28
215 4.45 272 8.01
236 5.99 285 9.97 374 18.84
259 7.91 303 12.43 383 22.24
283 10.24 323 15.30 397 26.42 463 37.69
309 13.20 345 18.73 412 30.63 475 43.58 533 56.57
336 16.83 369 22.87 430 35.58 489 49.74 543 63.75 595 78.40
363 21.06 393 27.47 450 41.27 504 56.05 556 71.77 605 87.36 652 103.42
391 26.15 418 32.83 472 47.90 522 63.43 571 80.22 618 97.50 662 114.17 749 151.36
419 32.00 445 39.36 494 54.99 542 71.84 587 89.05 632 107.65 675 126.37 756 163.56 836 206.27
448 38.92 471 46.39 518 63.29 562 80.64 605 98.93 648 118.69 689 138.64 767 178.64 841 220.00
477 46.79 499 54.86 542 72.24 584 90.79 625 110.15 665 130.36 704 151.27 779 194.18 850 237.04 919 283.18
506 55.65 526 63.93 567 82.33 607 102.01 646 122.39 684 143.47 721 165.20 793 210.56 861 255.85 927 302.47 991
535 65.58 554 74.36 592 93.26 631 114.44 668 135.79 704 157.66 739 180.04 808 227.43 874 276.00 937 324.07 998
593 88.86 611 99.00 645 119.52 679 141.71 713 165.26 746 189.12 778 213.23 841 263.74 903 317.41 963 372.47 1020
652 117.67 668 128.57 699 150.91 730 174.75 761 200.08 792 226.56 822 253.09 880 307.09 936 362.74 992 421.96 1047
MAXIMUM RPM:
Class I — 611
BC DWDI 660
Outlet Area - 45.08 ft2
0.5" SP
Class II — 789
Class III — 998 Wheel Dia. - 66.00 inches
1" SP
2" SP
3" SP
4" SP
Class IV — 1146
Max. BHP = 743 (RPM÷1000)3
Tip Speed - 17.28 x RPM
5" SP
352.33
373.59
426.23
483.16
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
36064 800
45080 1000
54096 1200
63112 1400
72128 1600
81144 1800
90160 2000
99176 2200
108192 2400
117208 2600
126224 2800
135240 3000
144256 3200
153272 3400
171304 3800
189336 4200
180 3.97
195 5.34 247 9.66
214 7.19 260 12.20 340 22.80
235 9.52 275 14.96 348 26.87
258 12.49 294 18.58 360 31.73 421 45.63
281 15.99 314 22.74 375 37.20 432 52.79 484 68.22
305 20.27 335 27.56 391 43.08 444 59.97 494 77.31 541 94.90
330 25.48 357 33.17 409 49.91 458 67.74 506 87.12 550 105.70 593 125.30
356 31.78 380 39.73 429 57.92 475 76.97 519 97.01 562 118.08 602 138.26 681 183.21
381 38.74 404 47.43 449 66.50 492 86.54 534 107.97 575 130.56 614 153.18 687 197.67 760 249.57
407 47.00 428 56.05 471 76.63 511 97.63 550 119.71 589 143.55 626 167.46 697 215.88 764 265.61 433 56.36 453 66.10 493 87.55 531 109.91 568 133.15 604 157.30 640 183.03 708 234.77 772 286.00 835 342.07
460 67.34 478 77.27 515 99.36 552 123.56 587 147.88 621 172.91 655 199.47 721 254.87 783 309.88 842 365.02 901
486 79.17 504 90.17 539 113.36 573 138.01 607 164.08 640 190.77 672 218.02 734 274.56 795 334.52 852 392.35 907
539 107.47 555 119.49 586 144.35 618 172.08 649 200.73 678 228.65 708 258.80 765 319.69 821 384.18 875 449.97 927
593 142.57 607 155.36 636 183.07 664 211.79 692 242.29 720 274.14 747 305.91 800 371.57 851 439.04 902 510.87 952
MAXIMUM RPM:
Class I — 555
Class II — 717
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
34
Class III — 907
426.42
451.61
515.25
584.93
Class IV — 1040
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Max. Static Efficiency = Underlined
Twin City Bulletin 300
BC DWDI 730
Outlet Area - 55.15 ft2
0.5" SP
Wheel Dia. - 73.00 inches
1" SP
2" SP
3" SP
4" SP
Max. BHP = 1229 (RPM÷1000)3
Tip Speed - 19.11 x RPM
5" SP
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
44120 800
55150 1000
66180 1200
77210 1400
88240 1600
99270 1800
110300 2000
121330 2200
132360 2400
143390 2600
154420 2800
165450 3000
176480 3200
187510 3400
209570 3800
231630 4200
163 4.87
177 6.62 223 11.77
194 8.87 235 14.91 308 28.06
213 11.73 249 18.39 315 32.99
233 15.23 265 22.52 326 39.00 381 55.98
254 19.55 284 27.85 339 45.50 390 64.30 438 83.69
276 24.86 303 33.76 353 52.48 402 73.68 446 94.17 489 116.01
299 31.38 323 40.66 370 61.16 414 82.82 457 106.24 497 129.10 536 153.17
321 38.57 344 48.79 388 70.93 429 93.87 469 118.50 508 144.36 544 168.89 616 224.47
345 47.62 365 57.90 406 81.38 445 106.00 483 132.25 519 158.94 555 187.27 621 241.67 687 305.15 368 57.51 387 68.60 426 93.85 462 119.44 498 147.10 532 175.10 566 204.89 630 263.90 691 325.31
392 69.23 410 81.12 446 107.31 480 134.39 514 163.34 546 192.35 579 224.34 640 287.06 698 349.92 755 418.59
416 82.45 432 94.43 466 121.85 499 151.09 531 181.21 562 212.16 592 243.79 652 311.99 708 379.24 762 447.86
440 97.26 455 109.83 487 138.42 518 168.79 549 200.96 578 232.62 607 265.98 664 336.48 719 409.64 770 479.43
488 132.03 502 146.37 530 176.79 558 209.68 586 244.60 613 279.75 640 316.44 692 391.70 742 469.48 791 550.28
536 174.29 549 190.28 575 223.95 600 258.67 626 296.91 651 335.43 675 373.62 723 454.03 770 538.37 816 626.11
MAXIMUM RPM:
Class I — 502
BC DWDI 807
Outlet Area - 67.48 ft2
0.5" SP
Class II — 648
Class III — 820
Wheel Dia. - 80.75 inches
1" SP
2" SP
3" SP
4" SP
522.43
552.44
630.10
713.82
Class IV — 940
Max. BHP = 2036 (RPM÷1000)3
Tip Speed - 21.14 x RPM
5" SP
815
820
838
860
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
53984 800
67480 1000
80976 1200
94472 1400
107968 1600
121464 1800
134960 2000
148456 2200
161952 2400
175448 2600
188944 2800
202440 3000
215936 3200
229432 3400
256424 3800
283416 4200
147 5.92
160 8.09 202 14.49
175 10.78 212 18.13 278 34.17
192 14.23 225 22.47 285 40.46
211 18.73 240 27.71 295 47.86 344 68.24
230 24.03 256 33.79 306 55.41 353 78.96 396 102.43
250 30.60 274 41.34 319 64.14 363 89.84 404 115.92 442 141.88
270 38.26 292 49.75 334 74.51 375 101.94 413 129.87 450 158.71 485 187.94
291 47.59 311 59.71 350 86.23 388 115.01 424 145.01 459 176.36 492 206.92 556 273.35
312 58.33 330 70.87 367 99.55 402 129.42 436 161.11 470 195.48 502 229.50 562 296.66 621 373.26
333 70.57 350 84.04 385 114.73 418 146.50 450 179.75 481 214.32 512 251.18 570 323.70 625 398.65
354 84.44 370 98.74 403 131.11 434 164.52 464 199.00 494 235.94 523 273.83 579 352.01 631 428.14 683 513.22
376 100.82 391 115.95 421 148.81 451 184.74 480 221.68 508 259.50 535 297.99 589 380.93 640 463.92 688 545.93
397 118.31 412 135.04 440 169.07 469 207.48 496 245.43 523 285.41 549 325.91 600 411.15 650 501.24 696 586.37
441 161.37 454 179.32 479 216.14 505 257.41 530 299.71 555 343.84 578 386.05 625 477.94 671 575.00 715 673.08
485 213.84 496 232.39 519 272.74 543 317.54 566 363.46 588 409.35 611 458.93 654 556.54 696 658.47 737 763.98
MAXIMUM RPM:
Class I — 459
BC DWDI 890
Outlet Area - 81.98 ft2
0.5" SP
Class II — 589
Class III — 746 Wheel Dia. - 89.00 inches
1" SP
2" SP
3" SP
4" SP
639.81
677.87
772.28
875.23
Class IV — 851
Max. BHP = 3311 (RPM÷1000)3
Tip Speed - 23.30 x RPM
5" SP
737
742
758
778
6" SP
8" SP
10" SP
12" SP
14" SP
CFM OV RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
65584 800
81980 1000
98376 1200
114772 1400
131168 1600
147564 1800
163960 2000
180356 2200
196752 2400
213148 2600
229544 2800
245940 3000
262336 3200
278732 3400
311524 3800
344316 4200
134 7.30
145 9.80 183 17.52
159 13.15 192 21.90 252 41.40
175 17.52 204 27.24 258 48.82
191 22.60 218 33.78 267 57.71 312 82.81
208 28.91 233 41.43 278 67.58 320 95.67 359 124.13
226 36.77 248 49.86 290 78.38 329 108.79 366 140.19 401 172.33
245 46.49 265 60.48 303 90.48 340 123.57 375 158.12 408 192.40 440 228.25
264 57.79 282 72.40 318 105.19 352 139.68 385 176.58 417 215.09 447 252.40 505 333.15
283 70.79 300 86.60 333 120.95 365 157.56 396 196.33 426 236.75 455 277.95 510 360.60 564 454.82
302 85.62 318 102.52 349 139.00 379 177.61 408 217.89 437 261.41 464 304.07 517 392.86 567 484.13
321 102.39 336 120.27 365 158.43 394 200.21 421 241.76 448 286.21 475 333.66 525 426.83 573 521.46 619 621.40
341 122.32 355 141.14 382 180.80 409 224.10 435 268.35 461 315.42 486 363.33 535 464.31 581 564.54 625 665.69
361 144.68 374 164.30 399 205.05 425 251.10 450 298.10 474 345.57 498 395.65 545 501.17 589 606.61 632 714.10
400 195.85 412 217.96 435 263.28 458 312.31 481 364.37 503 416.32 525 470.52 567 580.40 609 699.20 649 818.72
440 259.69 450 282.26 471 331.54 492 384.17 513 440.14 534 498.68 554 556.40 593 674.79 631 798.07 669 929.41
MAXIMUM RPM:
Class I — 416
Class II — 534
Performance certified is for installation Type B & D: Free
or ducted inlet, ducted outlet.
Power rating (BHP) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
35
Class III — 677
668
673
688
706
774.89
822.69
939.27
1063.78
Class IV — 772
Legend:
Class I = Regular face to left of Class II
Class III = Italic face to right of Class II
Class II = Regular face in light shaded area Class IV= Italic face in darker shaded area
Max. Static Efficiency = Underlined
Twin City Bulletin 300
HG
CW DBD
D
HN
NOTE 4
HJ
D
HE
GC
GA. SIDES
GA
HE
G
A
13.00
14.31
15.88
17.44
19.38
21.19
23.56
25.94
28.63
HG
9.31
10.25
11.38
12.50
13.81
15.91
16.81
18.50
20.44
SIZE
122
135
150
165
182
200
222
245
270
B
19.06
8.69
9.56
10.63
11.69
12.88
14.13
15.69
17.25
HH
9.75
10.81
11.94
13.19
14.56
15.94
17.69
19.44
21.38
20.94
9.25
10.25
11.44
12.63
14.00
15.31
17.19
19.00
HJ
0.44
0.44
0.44
0.44
0.44
0.56
0.56
0.56
0.56
BH
CW TAU
DB
HB
SE
KL
C
HK
13.25
14.56
16.19
17.75
19.50
21.38
23.75
26.06
28.50
HH
35.00
15.69
17.31
19.25
21.19
23.56
25.75
28.75
31.75
HD
N
KWY
SIZE
KS
D
HN
14.50
15.75
17.75
19.00
21.00
22.75
25.50
28.00
30.50
28.56
12.94
14.25
15.81
17.38
19.31
21.13
23.50
25.88
DISCH.
FLANGE
DX
P
B
DX
14.25
7.44
8.00
9.06
9.69
10.88
11.56
12.44
13.31
J
1.00
1.00
1.00
1.00
1.25
1.25
1.25
1.25
1.50
FR
K
145T
184T
184T
215T
254T
254T
256T
256T
284T
HG
A
11.81
5.75
6.31
6.88
7.50
8.19
8.88
10.00
10.88
HC
CW UBD
H
GA. SCROLL
GB
OUTS.
HSG.
J
G
4.5
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.5
KL
16.00
17.50
19.00
20.50
22.50
25.00
27.25
29.75
33.00
D
HA
C
O.D.
INLET
BH
DIA. BASE
HOLES
0.38x0.19
14
14
14
14
14
14
14
14
14
8.00
8.75
9.50
10.25
11.25
12.50
13.63
14.88
16.50
GC
HF
0.38x0.19
KS
CL II
0.25x0.13
0.25x0.13
0.25x0.13
0.25x0.13
0.38x0.19
0.38x0.19
0.38x0.19
0.38x0.19
GB
KS
CL I
0.25x0.13
0.25x0.13
0.25x0.13
0.25x0.13
0.25x0.13
0.38x0.19
0.38x0.19
0.38x0.19
14
14
14
14
12
12
12
12
12
GA
CW BAU
HB
H
26.38
14.50
17.00
17.00
19.88
24.25
24.25
23.50
23.50
L
14.13
6.75
7.38
8.25
8.75
9.63
10.63
11.75
12.88
M
9.75
10.75
11.94
13.13
14.50
15.81
17.69
19.50
21.44
HA
CW BHD
27.00
30.63
31.75
36.13
41.88
43.25
45.25
47.00
51.75
D
HH
HA
0.88
0.50
0.50
0.50
0.63
0.63
0.63
0.88
0.88
N
16.75
18.38
20.31
22.25
24.81
27.00
30.00
33.00
36.44
HB
HE
SP
CLASS
6.44
7.13
7.88
8.69
9.63
10.56
11.75
12.94
14.25
38.50
42.31
Q
11.19
12.31
13.75
15.06
16.69
18.38
20.44
22.38
24.69
HD
1.437
1.687
SD
CL I
1.000
1.000
1.000
1.000*
1.187
1.437
1.437
10.56
11.63
12.88
14.13
15.69
17.31
19.06
21.00
23.19
HE
HF
1.687
1.687
SD
CL II
1.000*
1.000*
1.187
1.188
1.437
1.437
1.437
ROT.
5.25
5.25
3.25
3.25
3.75
3.75
4.25
4.25
4.75
SE
122
135
150
165
182
200
222
245
270
SIZE
RPM
DISCH.
9.94
10.94
12.13
13.31
14.75
16.25
17.94
19.75
21.81
ACCESSORIES REQ'D.
CFM
SIZE
S.O. NO.
ENG./ARCH.
CONT.
LOC.
JOB:
245
270
122
135
150
165
182
200
222
SIZE
BHP
MTR. HP
MINNEAPOLIS, MINNESOTA 55442
OV
TWIN CITY FAN & BLOWER
MTR. LOC.
TS
UNIT NO.
DWG. NO. AC-9239F
REVISED 7-15-05
"BCE", “BAE”, “BC” & "BAF" ARR. NO. 9 SWSI ROTATABLE
CLASS I & II
DRAWN 8-13-82
22.50
25.56
26.63
29.75
35.31
36.00
37.13
P
13.94
15.25
16.81
18.38
20.56
22.38
24.75
27.13
30.06
HC
DG
HG
NOTES:
1. DISCHARGE ANGLES ARE INCLUDED ON ALL
DISCHARGES EXCEPT "TAD" AND "DBD."
2. "CW" ROTATION IS SHOWN. "CCW" ROTATION IS
SIMILAR BUT OPPOSITE.
3. SHAFT DIAMETER IS INCREASED TO 1.187 ON
HI-TEMP. FANS WHICH REQUIRE SHAFT COOLERS.
4. STANDARD ARR. 9 MOTOR LOCATION IS ON THE
LEFT FOR "CW" ROTATION UNITS, AND ON THE
RIGHT FOR "CCW" ROTATION. DIMENSION "FR"
EQUALS MAX. MOTOR FRAME.
*
FAN HSG.
CL
M
FOUNDATION PLAN
L
K
K
M
CL
FAN SHAFT
DIMENSIONS ARE NOT TO BE USED FOR CONSTRUCTION. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
HN
HJ
SIZE
HK
SD
DIA. SHAFT
Q
HC
CW THD
122
135
150
165
182
200
222
245
270
CW TAD
D
HD
HF
CL
DISCH.
HA
OUTSIDE
HOUSING
36
Twin City Bulletin 300
CW DBD
HG
DC
HQ
HD
SIZE
27.44
30.13
33.50
37.00
40.88
44.88
49.75
55.00
60.38
66.94
31.81
35.13
38.69
42.63
47.13
51.94
57.38
63.50
69.69
77.25
300
330
365
402
445
490
542
600
660
730
300
330
365
402
445
490
542
600
660
730
A
DB
DA
HF
25.75
28.38
31.50
34.69
38.25
42.19
46.69
51.69
56.81
62.88
HE
17.25
19.06
21.13
23.31
25.81
28.13
31.81
34.94
39.13
42.63
AH
24.25
26.69
29.63
32.63
36.00
39.69
43.94
48.63
53.38
59.13
HF
23.81
26.06
28.88
31.81
35.19
38.63
42.88
47.31
52.19
57.56
B
CL
DISCH.
HA
CW TAD
HD
HE
G
MOTOR
(ARR. 9 ONLY)
SEE NOTE 3
SIZE
HP
GC
GA. SIDES
GA
HE
N
Twin City Bulletin 300
HL
31.63
34.75
38.50
42.44
46.88
51.63
57.13
63.13
69.38
76.75
C
21.25 47.13
23.31 51.00
25.88 55.50
28.50 60.50
31.50 65.69
34.69 72.31
38.44 78.88
42.50 86.25
46.50 94.81
51.63 104.19
HH
0.56
0.56
0.56
0.81
0.81
0.81
0.81
0.81
0.81
0.81
BH
HD
33.44
35.56
38.38
41.56
44.38
48.44
52.31
56.56
62.00
67.69
HM
26.75
30.00
29.00
32.00
35.38
39.00
43.06
47.69
52.44
58.00
DA
NOTE 4
HH
KS
KWY
SIZE
DX
DISCH.
FLANGE
OUTS.
HSG.
HQ
HC
34.25
37.56
41.13
45.56
50.06
54.88
61.31
67.44
74.63
82.13
HP
26.75
30.00
30.50
32.50
36.25
38.75
42.25
45.00
49.50
54.25
DB
NOTE 4
59.75
65.75
72.25
79.75
HQ
26.75
30.00
29.50
33.00
35.50
39.00
43.50
48.00
52.50
57.00
DC
NOTE 4
CW UBD
H
15.50
16.63
18.00
20.00
21.69
23.38
26.50
28.75
32.19
34.94
J
26.75
30.00
31.50
35.25
38.50
42.25
46.50
51.25
55.75
61.75
13.31
14.44
15.81
17.56
19.25
20.94
23.56
25.81
28.75
31.44
K
28.50
31.00
33.50
37.00
40.00
44.00
49.00
54.00
59.00
64.50
DE
DE
HA
O.D.
INLET
C
NOTE 4 NOTE 4
DD
HG
BASE ANGLES
BA
GA. SCROLL
GB
A
B
J
FAN HSG.
CL
M
DIA. BASE
HOLES
BH
AH
DBD ONLY
5.0
5.0
5.0
5.0
5.5
5.5
6.0
6.0
7.0
7.5
KL
30.00
32.75
35.50
39.50
43.25
47.50
52.25
57.50
63.00
69.50
DF
CW BAU
HA
KS
CL II
0.50x0.25
0.50x0.25
0.63x0.31
0.63x0.31
0.63x0.31
0.75x0.38
0.88x0.44
0.88x0.44
1.0x0.50
1.0x0.50
26.88
29.50
29.50
30.00
31.63
32.00
36.63
36.38
39.00
42.00
L
286T
324T
324T
326T
364T
364T
404T
404T
405T
405T
FR
ARR. 9
CW BHD
KS
CL I
0.50x0.25
0.50x0.25
0.50x0.25
0.50x0.25
0.63x0.31
0.63x0.31
0.75x0.38
0.75x0.38
0.88x0.44
0.88x0.44
DX
DF
HH
1.50
1.50
1.50
1.50
1.50
2.00
2.00
2.00
2.50
2.50
DG
HF
35.50
39.00
41.00
45.50
50.00
54.75
60.25
66.25
73.25
80.75
HB
G
15.88
17.38
18.88
20.88
22.88
25.38
27.63
30.63
33.13
37.13
M
41.00
44.00
48.00
52.50
56.50
61.50
67.00
73.00
80.00
88.00
HE
DG
HG
1.13
1.13
1.13
1.38
1.38
1.38
1.88
1.88
2.38
2.38
N
10
10
10
10
10
10
10
10
10
10
SP
CLASS
44.56
48.31
49.69
51.69
55.50
57.56
64.81
66.81
72.88
79.06
P
12
12
12
12
12
12
12
12
12
10
GB
15.81
17.50
19.25
21.25
23.50
25.88
28.63
31.69
34.75
38.50
Q
20.50
22.00
24.00
26.25
28.25
30.75
33.50
36.50
40.00
44.00
GC
ACCESSORIES REQ'D.
CFM
SIZE
S.O. NO.
CERT. BY:
ENG./ARCH.
LOC.
JOB:
SD
CL I
1.937
1.937
1.937
2.187
2.437
2.687
2.937
2.937
3.437
3.437
55.75
60.63
63.38
67.88
72.88
76.63
87.50
91.75
101.25
109.63
H
RPM
DISCH.
BHP
SD
CL II
1.937
2.187
2.437
2.437
2.687
2.937
3.437
3.437
3.937
3.937
23.81
26.25
29.00
32.00
35.38
39.00
43.06
47.69
52.44
58.00
HA
ROT.
HB
5.75
5.75
5.75
5.75
6.25
6.25
6.75
6.75
7.75
8.25
SE
40.31
44.44
48.88
53.81
59.38
65.69
72.38
80.00
88.06
97.31
300
330
365
402
445
490
542
600
660
730
SIZE
33.25
36.56
40.13
44.06
48.56
53.88
59.31
65.44
72.13
79.63
8-14-82
300
330
365
402
445
490
542
600
660
730
SIZE
TS
REVISED 7-15-05
DWG. NO. AC-9238E
DRAWN
SWSI
UNIT NO.
HC
OV
MTR. LOC.
MINNEAPOLIS, MINNESOTA 55442
TWIN CITY FAN & BLOWER
NON-ROTATABLE CLASS I & II
"BCE", "BAE", "BC" & "BAF" ARR. NO. 1 & ARR. NO. 9
GA
NOTES:
1. DISCHARGE ANGLES ARE INCLUDED ON ALL
DISCHARGES.
2. "CW" ROTATION IS SHOWN. "CCW" ROTATION IS
SIMILAR BUT OPPOSITE.
3. STANDARD ARR. 9 MOTOR LOCATION IS ON THE
LEFT FOR "CW" ROTATION UNITS, AND ON THE
RIGHT FOR "CCW" ROTATION. DIMENSION "FR"
EQUALS MAX. MOTOR FRAME.
4. FOR FANS WITH INLET BOX AT 90 DEGREES OR
270 DEGREES, USE “BAU” DISCHARGE DIMENSION
“DF” FOR CENTERLINE HEIGHT.
FOUNDATION PLAN
L
K
K
M
CL
FAN SHAFT
DIMENSIONS ARE NOT TO BE USED FOR CONSTRUCTION. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
22.75
25.00
27.75
30.56
33.75
37.19
41.19
45.56
49.94
55.38
HG
2.5x2.5
2.5x2.5
2.5x2.5
3.0x3.0
3.0x3.0
3.0x3.0
3.0x4.0
3.0x4.0
3.5x5.0
3.5x5.0
BA
CW TAU
DD
HB
CW THD
H
O (TA M
NL D
Y)
HL
SD
SE
KL
DIA. SHAFT
Q
HC
P
OUTSIDE
HOUSING
37
85.44
94.13
104.00
HD
74.00
81.56
90.06
807
890
982
SIZE
807
890
982
CW DBD
HP
A
HG
GC
AH
G
76.63
84.63
69.50
HE
53.75
47.06
50.25
DA
HE
NOTE 3
SIZE
DC
HQ
GA. SIDES
GA
HE
DB
HF
77.50
63.63
70.13
B
72.06
79.56
BA
4.0 x 6.0
67.50
74.50
61.25
HG
N
Twin City Bulletin 300
DA
NOTE 4
HM
125.38 80.75
140.06 91.75
113.69 73.00
HL
103.50 77.75
OUTS.
HSG.
90.31
HP
71.50
59.50
65.50
DB
NOTE 4
CW
UBD
H
DD
DE
HA
J
80.00
67.50
73.75
NOTE 4
HG
K
K
M
DIA. BASE
HOLES
BH
DBD ONLY
AH
FOUNDATION PLAN
L
FAN HSG.
CL
M
SIZE
S.O. NO.
DISCH
ENG./ARCH.
CONT.
LOC.
JOB:
DE
NOTE 4
CW
BAU
37.69
41.88
34.44
K
86.50
8.00
8.00
8.00
KL
92.00
76.50
85.00
DF
HB
51.13
1.25x0.63
1.00x0.50
1.25x0.63
45.00
48.00
L
KS
CL II
1.00x0.50
1.25x0.63
122.00
M
7
10
7
GA
53.13
40.88
46.38
CW BHD
DG
HG
95.50
106.50
G
HE
KS
2.50
2.50
2.50
DX
HA
CL I
1.00x0.50
108.25
DF
HH
89.00
97.75
DG
HF
2.88
2.38
2.38
N
7
10
10
GB
98.88
85.81
92.06
P
61.00
47.75
53.25
GC
H
51.81
42.63
46.94
Q
140.63
118.63
128.13
RPM
ROT.
4.937
CL I
3.937
3.937
SD
77.75
64.19
70.00
HA
BHP
UNIT NO.
MINNEAPOLIS, MINNESOTA 55442
5.437
CL II
4.437
4.937
SD
130.13
107.50
117.75
HB
OV
7-15-05
REVISED
9.00
9.00
9.00
SE
106.31
87.81
96.50
HC
TS
982
807
890
SIZE
982
807
890
SIZE
DWG. NO. AC-9259G
3-11-87
DRAWN
ARR. NO. 1 SWSI NON-ROTATABLE
TWIN CITY FAN & BLOWER
"BCE", "BAE", "BC" & "BAF"
CLASS I & II
NOTES:
1. DISCHARGE ANGLES ARE INCLUDED ON ALL
CFM
SP
DISCHARGES.
2. "CW" ROTATION IS SHOWN. "CCW" ROTATION IS
SIMILAR BUT OPPOSITE.
ACCESSORIES REQ'D.
3. FRAME SUPPORTS VARY IN CONSTRUCTION BY
SIZE AND BY DISCHARGE POSITION.
4. FOR FANS WITH INLET BOX AT 90 DEGREES OR 270
DEGREES, USE “BAU” DISCHARGE DIMENSION “DF”
FOR CENTERLINE HEIGHT.
72.00
78.25
C
O.D.
INLET
87.75 37.81
HQ
76.50
63.00
69.25
DC
NOTE 4
HQ
HC
BASE ANGLES
BA
GB
GA. SCROLL
A
B
J
99.00
96.50 41.06
109.75 106.75 45.75
CW TAU
HH
84.88 64.19
93.38 70.00
C
HD
KWY
SIZE
KS
DX
DISCH.
FLANGE
P
CL
FAN SHAFT
DIMENSIONS ARE NOT TO BE USED FOR CONSTRUCTION. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
62.94
69.44
57.13
HH
0.81
0.81
0.81
BH
DD
HB
CW THD
HM
O (TA
NL D
Y)
HL
SD
SE
KL
DIA. SHAFT
Q
HC
3.5 x 5.0
3.5 x 5.0
CW TAD
65.38
HB
HF
CL
DISCH.
HA
OUTSIDE
HOUSING
38
GC
HG
G
DC
HP
A
13.00
14.31
15.88
17.44
19.38
21.19
23.56
25.94
28.63
HD
11.19
12.31
13.75
15.06
16.69
18.38
20.44
22.38
24.69
SIZE
SIZE
122
135
150
165
182
200
222
245
270
DB
HD
AH
G
CL
10.56
11.63
12.88
14.13
15.69
17.31
19.06
21.00
23.19
HE
Twin City Bulletin 300
SD
x
x
x
x
x
x
x
x
x
9.31
10.25
11.38
12.50
13.81
15.19
16.81
18.50
20.44
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.0
2.0
BA
HG
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
BH
HH
0.44
0.44
0.44
0.44
0.44
0.56
0.56
0.56
0.56
G
N
C
HH
22.50
24.06
26.00
27.88
30.44
32.75
36.06
38.88
42.38
HL
BA
B
J
A
DA
17.88
18.75
20.00
21.06
22.50
23.94
26.25
27.81
29.88
HM
9.75
10.75
11.94
13.13
14.50
15.81
17.69
19.50
21.44
H
14.44
15.75
17.31
19.38
21.31
23.13
25.50
27.88
30.56
HP
15.25
16.00
16.75
17.50
18.50
19.50
21.00
22.00
23.50
DB
GC
HC
BASE ANGLES
GB
KWY
SIZE
KS
GA. SCROLL
13.25
14.56
16.19
17.75
19.50
21.38
23.75
26.06
28.50
KL
GC
8.69
9.56
10.63
11.69
12.88
14.13
15.69
17.25
19.06
CW TAU
DD
HB
HD
CW THD
DIA. SHAFT
Q
HC
DISCH.
FLANGE
DX
OUTS.
HSG.
P
G
7.44
8.00
9.06
9.69
10.88
11.56
12.44
13.31
14.25
J
DE
HA
5.75
6.31
6.88
7.75
8.44
9.13
10.00
10.88
11.81
K
11.00
12.00
13.25
14.50
15.75
17.25
19.25
21.25
23.50
DD
CW UBD
10.25
11.25
12.25
13.50
14.75
16.25
18.00
20.00
22.00
DC
HG
C
O.D.
INLET
M
AH
DBD ONLY
FOUNDATION PLAN
M
BH
DIA. BASE
HOLES
FAN HSG.
CL
DE
2.50
2.50
3.00
3.00
3.50
3.50
4.00
4.50
4.50
KL
11.50
12.75
14.00
15.25
16.75
18.25
20.50
22.50
24.75
HB
G
DF
HH
15.00
16.25
18.00
19.50
21.50
23.50
26.00
28.25
31.00
DG
DX
1.00
1.00
1.00
1.00
1.25
1.25
1.25
1.25
1.50
N
0.63
0.63
0.63
0.88
0.88
0.88
0.88
0.88
0.88
6.75
7.38
8.25
8.75
9.63
10.63
11.75
12.88
14.13
14
14
14
14
14
14
14
14
14
GB
CW BHD
DG
HG
M
14
14
14
14
12
12
12
12
12
GA
HE
GC
GD
19.75
21.00
22.75
24.25
26.00
28.00
31.25
33.50
36.00
G
HA
KS
CL II
0.25 x 0.13
0.25 x 0.13
0.25 x 0.13
0.25 x 0.13
0.38 x 0.19
0.38 x 0.19
0.38 x 0.19
0.38 x 0.19
0.38 x 0.19
CW BAU
KS
CL I
0.25 x 0.13
0.25 x 0.13
0.25 x 0.13
0.25 x 0.13
0.25 x 0.13
0.38 x 0.19
0.38 x 0.19
0.38 x 0.19
0.38 x 0.19
12.25
13.25
14.75
16.25
17.75
19.25
22.00
24.00
26.25
DF
GC
HF
NOTES:
1. DISCHARGE ANGLES ARE INCLUDED ON ALL
DISCHARGES.
2. INLET BEARING BAR SUPPORT IS REMOVABLE.
3. "CW" ROTATION IS SHOWN. "CCW" ROTATION IS
SIMILAR BUT OPPOSITE.
4. BEARING BAR SUPPORTS MAY EXTEND BEYOND
BASE ANGLES. SEE DRAWING AC1000851 FOR
DIMENSIONS IF SPACE LIMITATIONS ARE REQUIRED
FOR MOUNTING FAN.
K
K
JOB:
SP
CLASS
P
CL I
10.00
10.56
11.63
12.25
13.81
15.31
16.69
18.06
19.00
9.88
10.50
11.38
12.13
13.00
14.00
15.63
16.75
18.00
GC
P
CL II
10.00
10.56
12.00
12.63
14.63
15.31
16.69
18.44
19.38
18.50
19.75
21.50
24.25
26.00
28.00
31.25
33.50
36.00
GD
H
6.44
7.13
7.88
8.69
9.63
10.56
11.75
12.94
14.25
Q
SD
CL I
1.000
1.000
1.000
1.000
1.187
1.437
1.437
1.437
1.437
BHP
SD
CLII
1.000
1.000
1.187
1.187
1.437
1.437
1.437
1.687
1.687
16.75
18.38
20.31
22.25
24.81
27.00
30.00
33.00
36.44
HB
ROT.
9.75
10.75
11.94
13.13
14.50
15.81
17.69
19.50
21.44
HA
RPM
DISCH.
12.75
13.88
15.00
17.25
18.63
20.00
21.75
23.50
25.38
ACCESSORIES REQ'D.
CFM
SIZE
S.O. NO.
CERT. BY.
ENG./ARCH.
LOC.
MINNEAPOLIS, MINNESOTA 55442
122
135
150
165
182
200
222
245
270
SIZE
13.94
15.25
16.81
18.38
20.56
22.38
24.75
27.13
30.06
HC
MTR. HP.
OV
10-20-83
122
135
150
165
182
200
222
245
270
SIZE
MTR. LOC.
TS
UNIT NO.
REVISED 7-15-05
DWG. NO. AC-9834G
DRAWN
SWSI NON-ROTATABLE
TWIN CITY FAN & BLOWER
"BCE", "BAE", "BC" & "BAF" ARR. NO. 3
CLASS I & II
DIMENSIONS ARE NOT TO BE USED FOR CONSTRUCTION. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
9.94
10.94
12.13
13.31
14.75
16.25
17.94
19.75
21.81
HF
9.75
10.81
11.94
13.19
14.56
15.94
17.69
19.44
21.38
B
CW TAD
H
O (TA M
NL D
Y)
HL
DISCH.
7.06
7.75
8.44
9.75
10.81
11.63
12.88
14.13
15.56
GC
HF
GD
122
135
150
165
182
200
222
245
270
CW DBD
DA
HE
GC
GA. SIDES
GA
HA
OUTSIDE
HOUSING
HE
CL
FAN SHAFT
39
CW DBD
HG
DC
HQ
HP
HF
G
A
31.81
35.13
38.69
42.63
47.13
51.94
57.38
63.50
69.69
77.25
HD
27.44
30.13
33.50
37.00
40.88
44.88
49.75
55.00
60.38
66.94
300
330
365
402
445
490
542
600
660
730
SIZE
300
330
365
402
445
490
542
600
660
730
AH
56.81
62.88
25.75
28.38
31.50
34.69
38.25
42.19
46.69
51.69
HE
HA
53.38
59.13
24.25
26.69
29.63
32.63
36.00
39.69
43.94
48.63
HF
23.81
26.06
28.88
31.81
35.19
38.63
42.88
47.31
52.19
57.56
B
H
O (TA M
NL D
Y)
HL
CL
DISCH.
17.25
19.06
21.13
23.31
25.81
28.13
31.81
34.94
39.13
42.63
CW TAD
DB
HD
SIZE
DA
HE
GC
GA. SIDES
GA
HE
Twin City Bulletin 300
BH
C
47.13
51.00
55.50
60.50
65.59
72.31
78.88
86.25
HL
31.63
34.75
38.50
42.44
46.88
51.63
57.13
63.13
69.38
76.75
46.50 94.81
51.63 104.19
21.25
23.31
25.88
28.50
31.50
34.69
38.44
42.50
HH
0.56
0.56
0.56
0.81
0.81
0.81
0.81
0.81
0.81
0.81
HH
B
DA
62.00
67.69
33.44
35.56
38.38
41.56
44.38
48.44
52.31
56.56
HM
23.81
26.25
29.00
32.00
35.38
39.00
43.06
47.69
52.44
58.00
A
HQ
HC
74.63
82.13
34.25
37.56
41.13
45.56
50.06
54.88
61.31
67.44
HP
26.00
27.75
30.50
32.50
36.25
38.75
42.25
45.00
49.50
54.25
DB
CW UBD
H
DC
72.25
79.75
59.75
65.75
HQ
DE
HA
32.19
34.88
16.00
17.13
19.06
20.50
22.69
24.44
26.56
29.75
J
26.00
28.50
31.50
35.25
38.50
42.25
46.50
51.25
55.75
61.75
DD
C
O.D.
INLET
HG
24.50
27.00
29.50
33.00
35.50
39.00
43.50
48.00
52.50
57.00
BASE ANGLES
BA
GA. SCROLL
GB
KWY
SIZE
KS
OUTS.
HSG.
J
M
CL
FAN HSG.
AH
DBD ONLY
FOUNDATION PLAN
M
DIA. BASE
HOLES
BH
28.75
31.44
13.31
14.44
15.81
17.56
19.25
20.94
23.56
25.81
K
28.50
31.00
33.50
37.00
40.00
44.00
49.00
54.00
59.00
64.50
DE
DF
7.00
7.50
5.00
5.00
5.00
5.00
5.50
5.50
6.00
6.00
KL
29.50
32.25
35.50
39.50
43.25
47.50
52.25
57.50
63.00
69.50
CW BAU
HB
30.63
33.13
37.13
0.88x0.44
1.00x0.50
1.00x0.50
0.75x0.38
0.88x0.44
15.88
17.38
18.88
20.88
22.88
25.38
27.63
M
KS
CL II
0.50x0.25
0.50x0.25
0.63x0.31
0.63x0.31
0.63x0.31
0.63x0.31
0.75x0.38
G
41.00
44.00
48.00
52.50
56.50
61.50
67.00
73.00
80.00
88.00
KS
CL I
0.38x.019
0.38x.019
0.50x0.25
0.50x0.25
0.50x0.25
0.50x0.25
0.63x0.31
0.75x0.38
DX
CW BHD
HE
1.50
1.50
1.50
1.50
1.50
2.00
2.00
2.00
2.50
2.50
DF
HH
HA
34.25
37.25
41.00
45.50
50.00
54.75
60.25
66.25
73.25
80.75
DG
HF
2.38
1.88
2.38
1.13
1.13
1.13
1.38
1.38
1.38
1.88
N
10
10
10
10
10
10
10
10
10
10
GA
DG
HG
NOTES:
1. DISCHARGE ANGLES ARE INCLUDED ON ALL
DISCHARGES.
2. INLET BEARING BAR SUPPORT IS REMOVABLE.
3. "CW" ROTATION IS SHOWN. "CCW" ROTATION IS
SIMILAR BUT OPPOSITE.
4. FRAME SUPPORTS VARY IN CONSTRUCTION BY
SIZE AND BY DISCHARGE POSITION.
5. BEARING BAR SUPPORTS MAY EXTEND BEYOND
BASE ANGLES. SEE DRAWING AC1000851 FOR
DIMENSIONS IF SPACE LIMITATIONS ARE
REQUIRED FOR MOUNTING FAN.
K
K
CL
FAN SHAFT
SP
CLASS
43.50
35.50
39.88
P
CL I
21.13
22.25
23.75
25.25
27.44
30.25
33.38
12
12
12
12
12
12
12
12
12
10
GB
44.00
36.88
40.81
P
CL II
21.25
22.88
24.63
26.13
29.19
30.88
33.75
20.50
22.00
24.00
26.25
28.25
30.75
33.50
36.50
40.00
44.00
GC
H
38.50
31.69
34.75
15.81
17.50
19.25
21.25
23.50
25.88
28.63
Q
HA
ROT.
3.437
2.937
2.937
SD
CL I
1.687
1.687
1.937
1.937
1.937
2.187
2.437
23.81
26.25
29.00
32.00
35.38
39.00
43.06
47.69
52.44
58.00
RPM
DISCH.
28.88
31.13
33.88
37.88
41.25
44.63
50.88
55.38
62.25
67.63
ACCESSORIES REQ'D.
CFM
SIZE
S.O. NO.
CERT. BY.
ENG./ARCH.
LOC.
JOB:
3.937
3.437
3.937
SD
CL II
1.937
2.187
2.437
2.437
2.687
2.687
2.937
40.31
44.44
48.88
53.81
59.38
65.69
72.38
80.00
88.06
97.31
HB
BHP
MINNEAPOLIS, MINNESOTA 55442
ARR. NO. 3 SWSI
OV
730
600
660
300
330
365
402
445
490
542
SIZE
33.25
36.56
40.13
44.06
48.56
53.88
59.31
65.44
72.13
79.63
HC
MTR. HP
8-13-82
300
330
365
402
445
490
542
600
660
730
SIZE
MTR. LOC.
TS
UNIT NO.
REVISED 7-15-05
DWG. NO. AC-9241F
DRAWN
NON-ROTATABLE
TWIN CITY FAN & BLOWER
"BCE" "BAE”, "BC”, & "BAF"
CLASS I & II
DIMENSIONS ARE NOT TO BE USED FOR CONSTRUCTION. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
49.94
55.38
22.75
25.00
27.75
30.56
33.75
37.19
41.19
45.56
HG
2.5x2.5
2.5x2.5
2.5x2.5
3.0x3.0
3.0x3.0
3.0x3.0
3.0x4.0
3.0x4.0
3.5x5.0
3.5x5.0
BA
CW TAU
DD
HB
N
KL
HD
CW THD
DIA. SHAFT
SD
Q
HC
DX
DISCH.
FLANGE
P
OUTSIDE
HOUSING
40
HG
DC
GA
G
HP
HD
DB
DA
HF
HE
GD
A
13.13
14.44
16.00
17.56
19.50
21.31
23.69
26.19
28.88
32.00
35.31
HB
17.00
18.63
20.56
22.50
24.81
27.06
30.06
33.25
36.50
40.38
44.44
SIZE
122
135
150
165
182
200
222
245
270
300
330
G
DISCH.
SIZE
CL
122
135
150
165
182
200
222
245
270
300
330
CW DBD
GC
GC
GA. SIDES
HA
AH
14.25
15.56
17.13
18.69
20.63
22.44
24.81
27.50
30.19
33.31
36.63
HC
GC
Twin City Bulletin 300
x
x
x
x
x
x
x
x
x
x
x
BA
2.0
2.0
2.0
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
10.63
11.69
12.94
14.19
15.75
17.38
19.13
21.13
23.31
25.81
28.44
HE
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
3.0
3.0
CW TAU
DD
HB
HF
0.44
0.44
0.44
0.44
0.56
0.56
0.56
0.56
0.56
0.81
0.81
BH
G
10.00
11.00
12.19
13.38
14.81
16.31
18.00
19.88
21.94
24.31
26.75
HD
C
GC
HH
9.38
10.31
11.44
12.56
13.88
15.25
16.88
18.63
20.56
22.81
25.06
HG
13.25
14.56
16.19
17.75
19.50
21.38
23.75
26.06
28.50
31.63
34.75
KWY
SIZE
KS
DISCH.
FLANGE
OUTS.
HSG.
8.75
9.63
10.69
11.75
12.94
14.19
15.75
17.38
19.19
21.13
23.38
HH
22.94
24.50
26.50
28.31
31.06
33.31
36.69
38.88
42.06
46.75
50.63
HL
15.25
16.00
16.75
17.50
18.50
19.50
21.00
22.00
23.50
26.00
27.75
DB
9.75
10.75
11.94
13.13
14.50
15.81
17.69
19.50
21.44
23.81
26.25
NOTE 3
G
DA
HC
N
NOTE 3
CW UBD
H
BA
18.19
19.06
20.31
21.38
23.31
24.69
27.06
27.50
29.25
32.81
34.94
HM
10.25
11.25
12.25
13.50
14.75
16.25
18.00
20.00
22.00
24.50
27.00
DC
GC
DE
HA
HG
C
O.D.
INLET
L
FAN HSG.
CL
M
BH
DIA. BASE
HOLES
DBD ONLY
AH
FOUNDATION PLAN
M
DD
DE
HB
15.00
16.31
17.88
19.44
21.38
23.19
26.06
28.50
31.19
34.81
38.13
HP
11.00
12.00
13.25
14.50
15.75
17.25
19.25
21.25
23.50
26.00
28.50
7.94
8.50
9.06
9.69
10.31
11.00
12.38
13.31
14.31
16.00
17.13
J
11.50
12.75
14.00
15.25
16.75
18.25
20.50
22.50
24.75
27.50
30.00
DF
6.06
6.63
7.19
7.81
8.44
9.13
10.25
11.19
12.19
13.63
14.75
K
GC
DF
HH
3.00
3.00
3.50
3.50
4.50
4.50
5.00
6.00
6.00
7.00
7.00
KL
15.50
16.75
18.50
19.50
22.00
24.00
26.50
28.75
31.50
34.75
37.75
DG
CW BAU
12.25
13.25
14.75
16.25
17.75
19.25
22.00
24.00
26.25
29.50
32.25
G
HF
DX
x
x
x
x
x
x
x
x
x
x
x
KS
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.50
1.50
1.50
1.50
0.38
0.38
0.38
0.38
0.38
0.50
0.50
0.50
0.50
0.63
0.63
HA
G
0.19
0.19
0.19
0.19
0.19
0.25
0.25
0.25
0.25
0.31
0.31
L
10
10
10
10
10
10
10
7
7
7
7
GA
SP
10
10
10
10
10
10
10
7
7
7
7
GB
0.88
0.88
0.88
0.88
0.88
0.88
1.13
1.13
1.13
1.38
1.38
N
9.88
10.50
11.38
12.13
13.50
14.50
16.13
17.25
18.50
21.00
22.50
GC
18.94
20.00
22.56
23.19
25.81
27.50
31.38
34.81
37.81
42.25
45.38
P
18.63
19.88
21.63
23.13
27.00
29.00
32.25
34.50
37.00
42.00
45.00
GD
ACCESSORIES REQ'D.
CFM
CLASS
S.O. NO.
CERT. BY.
ENG./ARCH.
LOC.
JOB:
6.44
7.13
7.88
8.69
9.63
10.56
11.75
12.94
14.25
15.81
17.50
Q
22.38
24.00
26.63
27.88
30.13
32.50
37.25
40.63
44.63
49.50
53.75
H
RPM
DISCH.
1.437
1.437
1.687
1.687
1.687
1.937
1.937
2.187
2.187
2.437
2.687
SD
9.75
10.75
11.94
13.13
14.50
15.81
17.69
19.50
21.44
23.81
26.25
HA
ROT.
3.50
3.50
4.00
4.00
5.00
5.00
5.50
6.50
6.50
7.75
7.75
SE
122
135
150
165
182
200
222
245
270
300
330
OV
122
135
150
165
182
200
222
245
270
300
330
SIZE
MTR. HP
SIZE
BHP
MINNEAPOLIS, MINNESOTA 55442
8-16-82
MTR. LOC.
TS
UNIT NO.
REVISED 7-15-05
DWG. NO. AC-9244D
DRAWN
SWSI NON-ROTATABLE
TWIN CITY FAN & BLOWER
"BCE", "BAE", "BC" & "BAF" ARR. NO. 1
CLASS III
SIZE
6.50
7.13
8.00
8.75
9.63
10.63
11.50
12.63
13.88
15.63
17.13
M
CW BHD
GC
7.50
8.00
9.50
9.50
10.50
11.50
13.75
15.25
17.25
19.00
21.00
19.75
21.00
22.75
24.25
27.00
29.00
32.25
34.50
37.00
42.00
45.00
GD
DG
HG
HE
NOTES:
1. DISCHARGE ANGLES ARE INCLUDED ON ALL
DISCHARGES.
2. "CW" ROTATION IS SHOWN. "CCW" ROTATION IS
SIMILAR BUT OPPOSITE.
3. FOR FANS SIZE 182-330 (EXCEPT TAD 182-200)
WITH INLET BOX AT 90 DEGREES OR 270 DEGREES,
USE “BAU” DISCHARGE DIMENSION “DF” FOR
CENTERLINE HEIGHT.
K
K
NOTE 3 NOTE 3 NOTE 3
BASE ANGLES
GB
GA. SCROLL
A
B
J
DIMENSIONS ARE NOT TO BE USED FOR CONSTRUCTION. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
11.25
12.38
13.81
15.13
16.75
18.38
20.50
22.50
24.81
27.50
30.19
HD
9.88
10.94
12.06
13.31
14.63
16.00
17.75
19.63
21.56
23.94
26.19
B
CW TAD
7.63
8.31
9.00
9.81
10.88
11.69
13.44
14.63
16.19
17.81
19.63
SE
CW THD
H
O (TA M
NL D
Y)
HL
SD
KL
DIA. SHAFT
Q
HC
DX
P
OUTSIDE
HOUSING
HE
CL
FAN SHAFT
41
CW DBD
HG
DC
HQ
HP
A
38.88
42.81
47.31
52.13
57.56
63.69
69.88
77.38
85.56
94.25
HC
40.19
44.63
49.13
53.94
59.88
66.00
72.19
79.69
87.88
96.56
SIZE
365
402
445
490
542
600
660
730
807
890
CW TAD
DB
HD
HF
SIZE
DA
HE
G
HA
33.63
37.06
41.00
44.94
49.88
55.06
60.50
67.00
74.13
81.63
HD
21.69
24.38
26.88
29.19
32.88
36.00
40.19
43.69
48.13
51.31
AH
CL
DISCH.
365
402
445
490
542
600
660
730
807
890
GC
GA. SIDES
GA
HE
B
31.56
34.75
38.31
42.25
46.75
51.75
56.88
62.94
69.56
76.69
HE
Twin City Bulletin 300
x
x
x
x
x
x
x
x
x
x
BA
3.0
4.0
4.0
4.0
5.0
5.0
6.0
6.0
6.0
6.0
29.69
32.69
36.06
39.75
44.00
48.69
53.44
59.19
65.44
72.13
HF
3.0
3.0
3.0
3.0
3.5
3.5
4.0
4.0
4.0
4.0
27.81
30.63
33.81
37.25
41.25
45.63
50.00
55.44
61.31
67.56
HG
0.81
0.81
0.81
0.81
0.81
0.81
0.81
0.81
0.81
0.81
BH
HD
DB
HL
37.75
40.75
44.94
48.50
52.88
57.81
62.06
67.75
73.75
81.50
HM
29.25
31.75
36.25
38.75
42.25
45.00
49.50
54.25
59.50
65.50
NOTE 3
29.00
32.00
35.38
39.00
43.06
47.69
52.44
58.00
64.19
70.00
DA
CW UBD
HQ
HC
41.69
46.63
51.13
55.94
62.38
68.50
75.69
83.19
91.38
100.06
HP
29.50
33.00
35.50
39.00
43.50
48.00
52.50
57.00
63.00
69.25
NOTE 3
DC
N
BASE ANGLES
BA
GA. SCROLL
GB
A
B
NOTE 3
HH
H
25.94 55.13
28.56 60.38
31.56 66.56
34.75 72.44
38.50 79.75
42.56 87.56
46.56 94.94
51.69 104.25
57.19 114.31
63.00 125.94
HH
38.50
42.44
46.88
51.63
57.13
63.13
69.38
76.75
84.88
93.38
C
KWY
SIZE
KS
DISCH.
FLANGE
OUTS.
HSG.
J
59.75
66.25
72.38
79.75
88.38
97.00
HQ
31.50
35.25
38.50
42.25
46.50
51.25
55.75
61.75
67.50
73.75
L
DIA. BASE
HOLES
BH
DBD ONLY
AH
FOUNDATION PLAN
FAN HSG.
CL
M
DE
CW BAU
HB
18.50
21.00
22.69
24.38
27.50
29.75
33.19
35.88
38.88
42.06
J
33.50
37.00
40.00
44.00
49.00
54.00
59.00
64.50
72.00
78.25
DF
16.13
18.13
19.81
21.50
24.13
26.38
29.31
32.00
35.00
38.19
K
35.50
39.50
43.25
47.50
52.25
57.50
63.00
69.50
76.50
85.00
DG
DF
HH
7.00
8.00
8.00
9.00
9.00
9.50
10.00
10.50
10.50
11.00
KL
41.50
45.50
50.00
54.75
60.75
66.75
73.75
81.25
89.50
98.25
HF
x
x
x
x
x
x
x
x
x
x
0.31
0.38
0.44
0.44
0.50
0.50
0.50
0.63
0.63
0.63
1.5
2.0
2.0
2.0
2.5
2.5
2.5
2.5
2.5
2.5
KS
x
x
x
x
x
x
x
x
x
x
DX
0.63
0.75
0.88
0.88
1.00
1.00
1.00
1.25
1.25
1.25
1.5
2.0
2.0
2.0
2.5
2.5
2.5
2.5
2.5
2.5
CW BHD
HA
G
22.50
24.00
27.00
29.00
29.50
32.50
35.00
38.00
41.00
44.00
L
49.00
52.50
56.50
61.50
67.00
74.00
80.00
88.00
96.50
107.50
M
7
7
7
7
7
7
7
7
7
7
GA
18.63
20.38
22.38
24.88
27.13
30.13
32.63
36.63
40.63
45.88
DG
HG
HE
NOTES:
1. DISCHARGE ANGLES ARE INCLUDED ON ALL
DISCHARGES.
2. "CW" ROTATION IS SHOWN. "CCW" ROTATION IS
SIMILAR BUT OPPOSITE.
3. FOR FANS WITH INLET BOX AT 90 DEGREES OR
270 DEGREES, USE “BAU” DISCHARGE DIMENSION
“DF” FOR CENTERLINE HEIGHT.
NOTE 3 NOTE 3
DD
DE
HA
HG
C
O.D.
INLET
K
K
M
CL
FAN SHAFT
SP
CLASS
1.38
1.88
1.88
1.88
2.38
2.38
2.88
2.88
2.88
2.88
N
7
7
7
7
7
7
7
7
7
7
GB
48.25
52.75
57.69
62.38
65.50
71.25
77.19
83.38
89.38
96.06
P
24.50
26.25
28.25
30.75
33.50
37.00
40.00
44.00
48.25
53.75
GC
ACCESSORIES REQ'D.
CFM
SIZE
S.O. NO.
CERT. BY.
ENG./ARCH.
LOC.
JOB:
19.25
21.25
23.50
25.88
28.63
31.69
34.75
38.50
42.63
46.94
Q
58.00
64.00
70.38
75.75
82.00
89.50
98.38
106.75
115.75
125.13
H
RPM
DISCH.
2.687
2.937
3.437
3.437
3.937
4.437
4.437
4.937
4.937
5.437
SD
29.00
32.00
35.38
39.00
43.06
47.69
52.44
58.00
64.19
70.00
HA
ROT.
HB
7.75
8.75
9.00
10.00
10.00
10.50
11.00
11.50
11.50
12.00
SE
48.94
54.19
59.75
65.69
72.81
80.38
88.13
97.38
107.50
117.75
BHP
MTR. LOC.
365
402
445
490
542
600
660
730
807
890
SIZE
365
402
445
490
542
600
660
730
807
890
SIZE
OV
8-16-82
TS
UNIT NO.
REVISED 7-15-05
DWG. NO. AC-9245E
DRAWN
SWSI NON-ROTATABLE
MTR. HP
MINNEAPOLIS, MINNESOTA 55442
ARR. NO. 1
TWIN CITY FAN & BLOWER
"BCE", "BAE", "BC" & "BAF"
CLASS III
DIMENSIONS ARE NOT TO BE USED FOR CONSTRUCTION. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
29.00
31.94
35.31
38.75
43.00
47.44
52.31
57.69
63.75
70.13
CW TAU
DD
HB
CW THD
H
O (TA M
NL D
Y)
HL
SD
SE
KL
DIA. SHAFT
Q
HC
DX
P
OUTSIDE
HOUSING
42
DC
HG
G
GC
HP
NOTE 3
DA
HE
GD
A
13.13
14.44
16.00
17.56
19.50
21.31
23.69
26.19
28.88
32.00
35.31
HB
17.00
18.63
20.56
22.50
24.81
27.06
30.06
33.25
36.50
40.38
44.44
122
135
150
165
182
200
222
245
270
300
330
SIZE
122
135
150
165
182
200
222
245
270
300
330
DB
HD
SIZE
CW DBD
GC
GA. SIDES
GA
HE
G
G
AH
HF
HC
14.25
15.56
17.13
18.69
20.63
22.44
24.81
27.50
30.19
33.31
36.63
B
HD
11.25
12.38
13.81
15.13
16.75
18.38
20.50
22.50
24.81
27.50
30.19
HE
x
x
x
x
x
x
x
x
x
x
x
BA
DD
HB
2.0
2.0
2.0
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
Twin City Bulletin 300
GC
HG
13.25
14.56
16.19
17.75
19.50
21.38
23.75
26.06
28.50
31.63
34.75
C
G
HH
9.38
10.31
11.44
12.56
13.88
15.25
16.88
18.63
20.56
22.81
25.06
HD
KWY
SIZE
KS
DX
HH
20.75
23.50
23.75
23.75
26.25
29.50
30.00
30.25
33.00
33.50
34.00
DA
GC
8.75
9.63
10.69
11.75
12.94
14.19
15.75
17.38
19.19
21.13
23.38
DISCH.
FLANGE
P
OUTS.
HSG.
HC
22.94
24.50
26.50
28.31
31.06
33.31
36.69
38.88
42.06
46.75
50.63
HL
20.75
23.50
23.75
23.75
26.25
29.50
30.00
30.25
33.00
33.50
34.00
DB
CW UBD
H
GC
18.19
19.06
20.31
21.38
23.31
24.69
27.06
27.50
29.25
32.81
34.94
HM
20.75
23.50
23.75
23.75
26.25
29.50
30.00
30.25
33.00
33.50
34.00
DC
G
HG
N
BASE ANGLES
BA
GB
GA. SCROLL
A
B
J
15.00
16.31
17.88
19.44
21.38
23.19
26.06
28.50
31.19
34.81
38.13
HP
20.75
23.50
23.75
23.75
26.25
29.50
30.00
30.25
33.00
33.50
34.00
DD
DE
HA
C
BH
DIA. BASE
HOLES
AH
DBD ONLY
FOUNDATION PLAN
FAN HSG.
CL
M
DE
J
7.94
8.50
9.06
9.69
10.31
11.00
12.38
13.31
14.31
16.00
17.13
DF
6.06
6.63
7.19
7.81
8.44
9.13
10.25
11.19
12.19
13.63
14.75
K
20.75
23.50
23.75
23.75
26.25
29.50
30.00
30.25
33.00
33.50
34.00
CW BAU
HB
G
3.50
4.25
4.25
4.25
5.00
6.00
6.00
6.00
7.00
6.75
6.75
KL
20.75
23.50
23.75
23.75
26.25
29.50
30.00
30.25
33.00
34.75
37.75
DG
GC
HF
DX
x
x
x
x
x
x
x
x
x
x
x
KS
0.19
0.19
0.19
0.19
0.19
0.25
0.25
0.25
0.25
0.31
0.31
CW BHD
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.50
1.50
1.50
1.50
0.38
0.38
0.38
0.38
0.38
0.50
0.50
0.50
0.50
0.63
0.63
DF
HH
HA
17.38
22.75
22.75
22.75
25.00
26.50
26.75
26.75
27.88
28.13
28.13
L
215T
256T
256T
256T
286T
326T
326T
326T
365T
365T
365T
FR
GC
GD
HE
6.50
7.13
8.00
8.75
9.63
10.63
11.50
12.63
13.88
15.63
17.13
M
19.75
21.00
22.75
24.25
27.00
29.00
32.25
34.50
37.00
42.00
45.00
G
DG
HG
NOTES:
1. DISCHARGE ANGLES ARE INCLUDED ON ALL
DISCHARGES.
2. "CW" ROTATION IS SHOWN. "CCW" ROTATION IS
SIMILAR BUT OPPOSITE.
3. STANDARD ARR. 9 MOTOR LOCATION IS ON THE
LEFT FOR "CW" ROTATION UNITS, AND ON THE
RIGHT FOR "CCW" ROTATION. DIMENSION "FR"
EQUALS MAX. MOTOR FRAME.
20.75
23.50
23.75
23.75
26.25
29.50
30.00
30.25
33.00
33.50
34.00
O.D.
INLET
L
K
K
M
CL
FAN SHAFT
SP
0.88
0.88
0.88
0.88
0.88
0.88
1.13
1.13
1.13
1.38
1.38
N
10
10
10
10
10
10
10
7
7
7
7
GA
29.31
36.00
36.56
37.19
40.81
44.25
45.63
46.56
49.69
51.38
52.50
P
10
10
10
10
10
10
10
7
7
7
7
GB
GC
6.44
7.13
7.88
8.69
9.63
10.56
11.75
12.94
14.25
15.81
17.50
Q
SD
18.63
19.88
21.63
23.13
27.00
29.00
32.25
34.50
37.00
42.00
45.00
GD
ROT.
1.4375
1.4375
1.6875
1.6875
1.6875
1.9375
1.9375
2.1875
2.1875
2.4375
2.6875
RPM
9.88
10.50
11.38
12.13
13.50
14.50
16.13
17.25
18.50
21.00
22.50
ACCESSORIES REQ'D.
CFM
CLASS
S.O. NO.
SIZE
DISCH.
4.00
4.75
4.75
4.75
5.50
6.75
6.75
6.75
7.75
7.75
7.75
SE
122
135
150
165
182
200
222
245
270
300
330
SIZE
9.75
10.75
11.94
13.13
14.50
15.81
17.69
19.50
21.44
23.81
26.25
HA
OV
10-29-90
122
135
150
165
182
200
222
245
270
300
330
SIZE
TS
UNIT NO.
REVISED 7-15-05
DWG. NO. AC-9128E
DRAWN
NON-ROTATABLE
MTR. LOC.
SWSI
MTR. HP
32.25
38.75
39.88
41.13
44.63
47.50
50.25
52.13
55.25
58.63
60.88
H
BHP
MINNEAPOLIS, MINNESOTA 55442
ENG./ARCH.
CONT.
LOC.
JOB:
ARR. NO. 9
TWIN CITY FAN & BLOWER
"BCE", "BAE", "BC" & "BAF"
CLASS III
DIMENSIONS ARE NOT TO BE USED FOR CONSTRUCTION. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
10.00
11.00
12.19
13.38
14.81
16.31
18.00
19.88
21.94
24.31
26.75
HF
0.44
0.44
0.44
0.44
0.56
0.56
0.56
0.56
0.56
0.81
0.81
BH
CW TAU
10.63
11.69
12.94
14.19
15.75
17.38
19.13
21.13
23.31
25.81
28.44
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
3.0
3.0
CW TAD
GC
SE
KL
CW THD
DIA. SHAFT
SD
HC
Q
H
O (TA M
NL D
Y)
HL
9.88
10.94
12.06
13.31
14.63
16.00
17.75
19.63
21.56
23.94
26.19
GC
DISCH.
7.63
8.31
9.00
9.81
10.88
11.69
13.44
14.63
16.19
17.81
19.63
CL
HA
OUTSIDE
HOUSING
43
DC
HQ
HG
DA
HE
G
49.13
53.94
59.88
66.00
72.19
79.69
87.88
96.56
807
890
445
490
542
600
660
730
807
890
85.56
94.25
600
660
730
HC
63.69
69.88
77.38
445
490
542
40.19
44.63
47.31
52.13
57.56
365
402
SIZE
A
38.88
42.81
SIZE
CW DBD
GC
365
402
HP
NOTE 3
GA. SIDES
GA
HE
DB
HD
AH
41.00
44.94
49.88
55.06
60.50
67.00
74.13
81.63
33.63
37.06
HD
48.13
51.31
36.00
40.19
43.69
26.88
29.19
32.88
21.69
24.38
B
38.31
42.25
46.75
51.75
56.88
62.94
69.56
76.69
31.56
34.75
HE
63.75
70.13
47.44
52.31
57.69
35.31
38.75
43.00
BA
Twin City Bulletin 300
BH
33.81
37.25
41.25
45.63
50.00
55.44
61.31
67.56
27.81
30.63
HG
0.81
0.81
0.81
0.81
0.81
0.81
0.81
0.81
0.81
0.81
C
31.56
34.75
38.50
42.56
46.56
51.69
57.19
63.00
25.94
28.56
HH
84.88
93.38
63.13
69.38
76.75
46.88
51.63
57.13
38.50
42.44
HD
66.56
72.44
79.75
87.56
94.94
104.25
114.31
125.94
55.13
60.38
HL
64.19
70.00
47.69
52.44
58.00
41.00
41.00
43.06
37.50
40.25
DA
CW TAU
HH
KS
KWY SIZE
DX
DISCH.
FLANGE
P
OUTS.
HSG.
44.94
48.50
52.88
57.81
62.06
67.75
73.75
81.50
37.75
40.75
HM
59.50
65.50
45.00
49.50
54.25
41.00
41.00
42.25
37.50
40.25
DB
H
51.13
55.94
62.38
68.50
75.69
83.19
91.38
100.06
41.69
46.63
HP
63.00
69.25
48.00
52.50
57.00
41.00
41.00
43.50
37.50
40.25
DC
HQ
HC
DE
HA
C
O.D.
INLET
59.75
66.25
72.38
79.75
88.38
97.00
HQ
67.50
73.75
51.25
55.75
61.75
41.00
42.25
46.50
37.50
40.25
72.00
78.25
54.00
59.00
64.50
41.00
44.00
49.00
37.50
40.25
22.69
24.38
27.50
29.75
33.19
35.88
38.88
42.06
18.50
21.00
J
K
K
BH
DIA. BASE
HOLES
DBD ONLY
AH
FOUNDATION PLAN
L
FAN HSG.
CL
M
19.81
21.50
24.13
26.38
29.31
32.00
35.00
38.19
16.13
18.13
K
76.50
85.00
57.50
63.00
69.50
43.25
47.50
52.25
37.50
40.25
DF
HB
8.75
8.75
9.00
9.00
9.00
9.00
9.00
9.00
8.00
8.75
KL
89.50
98.25
66.75
73.75
81.25
50.00
54.75
60.75
41.50
45.50
DG
HF
0.88
0.88
1.00
1.00
1.00
1.25
1.25
1.25
x
x
x
x
x
x
x
x
0.44
0.44
0.50
0.50
0.50
0.63
0.63
0.63
0.63 x 0.31
0.75 x 0.38
KS
2.50
2.50
2.50
2.50
2.50
2.00
2.00
2.50
1.50
2.00
DX
CW BAU
DF
HH
41.13
41.13
41.25
41.25
41.75
41.75
41.75
41.75
34.88
41.13
L
405T
405T
405T
405T
405T
405T
405T
405T
405T
405T
FR
HA
74.00
80.00
88.00
56.50
61.50
67.00
49.00
52.50
G
CW BHD
DG
HG
22.38
24.88
27.13
30.13
32.63
36.63
40.38
45.88
18.63
20.38
M
96.50
107.50
HE
NOTES:
1. DISCHARGE ANGLES ARE INCLUDED ON ALL
DISCHARGES.
2. "CW" ROTATION IS SHOWN. "CCW" ROTATION IS
SIMILAR BUT OPPOSITE.
3. STANDARD ARR. 9 MOTOR LOCATION IS ON THE
LEFT FOR "CW" ROTATION UNITS, AND ON THE
RIGHT FOR "CCW" ROTATION. DIMENSION "FR"
EQUALS MAX. MOTOR FRAME.
DE
CW UBD
DD
HG
N
BASE ANGLES
BA
GA. SCROLL
GB
A
B
J
M
CL FAN SHAFT
JOB:
SP
CLASS
1.88
1.88
2.38
2.38
2.88
2.88
2.88
2.88
1.38
1.88
N
7
7
7
7
7
7
7
7
7
7
GA
72.81
74.50
77.75
80.00
83.44
86.13
89.13
92.31
61.88
71.13
P
7
7
7
7
7
7
7
7
7
7
GB
23.50
25.88
28.63
31.69
34.75
38.50
42.63
46.94
19.25
21.25
Q
48.25
53.75
37.00
40.00
44.00
28.25
30.75
33.50
ROT.
3.437
3.437
3.937
4.437
4.437
4.937
4.937
5.437
2.687
2.937
SD
116.50
122.88
98.25
105.13
110.50
84.50
87.88
93.75
70.38
81.13
H
RPM
DISCH.
24.50
26.25
GC
ACCESSORIES REQ'D.
CFM
SIZE
S.O. NO.
ENG./ARCH.
CONT.
LOC.
10.00
10.00
10.50
10.50
10.50
10.50
10.50
10.50
9.00
10.00
SE
64.19
70.00
47.69
52.44
58.00
35.38
39.00
43.06
29.00
32.00
HA
BHP
MINNEAPOLIS, MINNESOTA 55442
ARR. NO. 9
445
490
542
600
660
730
807
890
365
402
SIZE
107.50
117.75
80.38
88.13
97.38
59.75
65.69
72.81
48.94
54.19
HB
MTR. HP
OV
10-30-90
807
890
600
660
730
445
490
542
365
402
SIZE
TS
UNIT NO.
REVISED 7-15-05
DWG. NO. AC-9129D
DRAWN
NON-ROTATABLE
MTR. LOC.
SWSI
TWIN CITY FAN & BLOWER
"BCE", "BAE", "BC" & "BAF"
CLASS III
DIMENSIONS ARE NOT TO BE USED FOR CONSTRUCTION. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
36.06
39.75
44.00
48.69
53.44
59.19
65.44
72.13
29.69
32.69
HF
4.0 x 6.0
4.0 x 6.0
3.5 x 5.0
4.0 x 6.0
4.0 x 6.0
3.0 x 4.0
3.0 x 4.0
3.5 x 5.0
3.0 x 3.0
3.0 x 4.0
DD
HB
CW THD
CW TAD
KL
SE
DIA. SHAFT
SD
HC
Q
H
O (TA M
NL D
Y)
HL
29.00
31.94
DISCH.
HF
CL
HA
OUTSIDE
HOUSING
44
HG
DC
G
GC
HP
HD
DB
DA
HF
HE
GD
A
13.25
14.56
16.13
17.69
19.63
21.44
23.81
26.19
28.88
32.00
35.44
HB
17.00
18.63
20.63
22.56
25.06
27.25
30.63
33.56
36.88
40.75
44.88
122
135
150
165
182
200
222
245
270
300
330
SIZE
122
135
150
165
182
200
222
245
270
300
330
AH
GC
14.31
15.63
17.19
18.75
20.94
22.75
25.63
28.00
30.69
33.81
37.19
HC
Twin City Bulletin 300
HE
x
x
x
x
x
x
x
x
x
x
x
BA
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
4.0
4.0
10.69
11.75
13.00
14.25
15.81
17.44
19.19
21.13
23.31
25.81
28.50
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
3.0
10.06
11.06
12.25
13.44
14.88
16.38
18.06
19.88
21.94
24.31
26.81
HF
0.44
0.44
0.44
0.44
0.56
0.56
0.56
0.56
0.56
0.81
0.81
BH
G
GC
9.44
10.38
11.50
12.63
13.94
15.31
16.94
18.63
20.56
22.81
25.13
HG
13.25
14.56
16.19
17.75
19.50
21.38
23.75
26.06
28.50
31.63
34.75
C
DE
HA
HG
KWY
SIZE
KS
DX
DISCH.
FLANGE
P
OUTS.
HSG.
8.81
9.69
10.75
11.81
13.00
14.25
15.81
17.38
19.19
21.31
23.44
HH
9.75
10.75
11.94
13.13
14.50
15.81
17.69
19.50
21.44
23.81
26.25
NOTE 3
DA
DB
HD
23.00
24.56
26.56
28.38
31.50
33.25
37.44
39.63
43.25
47.50
51.38
HL
15.25
16.00
16.75
17.50
18.50
19.50
21.00
22.00
23.50
26.00
27.75
NOTE 3
CW TAU
DD
HB
H
G
DC
GC
HH
18.25
19.13
20.38
21.44
23.63
24.31
27.31
28.00
30.50
33.31
35.50
HM
10.25
11.25
12.25
13.50
14.75
16.25
18.00
20.00
22.00
24.50
27.00
15.56
16.88
18.44
20.00
22.44
24.25
26.63
29.00
31.69
35.81
39.19
HP
11.00
12.00
13.25
14.50
15.75
17.25
19.25
21.25
23.50
26.00
28.50
K
K
L
M
BH
DIA. BASE
HOLES
AH
DBD ONLY
FOUNDATION PLAN
FAN HSG.
CL
M
HB
DE
8.50
9.06
9.63
10.25
11.38
12.06
12.94
13.81
14.81
17.00
18.19
J
11.50
12.75
14.00
15.25
16.75
18.25
20.50
22.50
24.75
27.50
30.00
6.38
6.94
7.50
8.13
9.00
9.69
10.56
11.44
12.44
14.13
15.31
K
12.25
13.25
14.75
16.25
17.75
19.25
22.00
24.00
26.25
29.50
32.25
DF
G
GC
HF
4.5
5.0
5.0
5.0
5.5
6.0
6.0
6.5
7.5
8.0
9.0
KL
15.50
16.75
18.50
19.50
22.00
24.00
26.50
28.75
31.50
34.75
37.75
DG
DF
HH
DX
x
x
x
x
x
x
x
x
x
x
x
KS
1.25
1.25
1.25
1.25
1.50
1.50
2.00
2.00
2.00
2.00
2.00
0.38
0.38
0.38
0.50
0.50
0.50
0.50
0.63
0.63
0.63
0.75
HA
0.19
0.19
0.19
0.25
0.25
0.25
0.25
0.31
0.31
0.31
0.38
GD
L
19.75
21.00
22.75
24.25
28.00
30.00
32.25
34.50
38.00
42.00
45.00
G
JOB:
7
7
7
7
7
7
7
7
7
7
0.25
6.25
6.88
7.75
8.50
9.13
10.13
11.25
12.38
13.63
15.13
16.63
M
SP
CLASS
1.13
1.13
1.13
1.13
1.38
1.38
1.38
1.38
1.38
1.88
1.88
N
7
7
7
7
7
7
7
7
7
7
0.25
GB
P
21.00
22.56
24.63
25.25
27.88
30.06
32.94
36.06
40.06
44.25
48.44
6.44
7.13
7.88
8.69
9.63
10.56
11.75
12.94
14.25
15.81
17.50
Q
18.75
20.00
21.75
23.25
26.00
28.00
32.25
34.50
38.00
42.00
45.00
GD
RPM
DISCH.
9.88
10.50
11.38
12.13
14.00
15.00
16.13
17.25
19.00
21.00
22.50
GC
ACCESSORIES REQ'D.
CFM
SIZE
S.O. NO.
CERT. BY.
ENG./ARCH.
LOC.
H
BHP
1.687
1.687
1.687
1.937
1.937
2.187
2.187
2.437
2.437
2.687
2.937
SD
23.50
25.13
27.75
29.00
32.25
34.63
38.38
41.63
45.63
51.50
55.88
ROT.
MINNEAPOLIS, MINNESOTA 55442
ARR. NO. 1
5.00
5.50
5.50
5.50
6.00
6.50
6.50
7.25
8.25
8.75
9.75
SE
9.75
10.75
11.94
13.13
14.50
15.81
17.69
19.50
21.44
23.81
26.25
HA
MTR. HP
MTR. LOC.
122
135
150
165
182
200
222
245
270
300
330
SIZE
122
135
150
165
182
200
222
245
270
300
330
SIZE
OV
8-16-82
TS
UNIT NO.
REVISED 7-15-05
DWG. NO. AC-9249F
DRAWN
SWSI NON-ROTATABLE
TWIN CITY FAN & BLOWER
"BCE", "BAE", "BC" & "BAF"
CLASS IV
GA
CW BHD
7.75
8.25
9.75
9.75
11.00
12.00
14.00
15.50
17.50
19.50
21.50
GC
DG
HG
HE
NOTES:
1. DISCHARGE ANGLES ARE INCLUDED ON ALL
DISCHARGES.
2. "CW" ROTATION IS SHOWN. "CCW" ROTATION IS
SIMILAR BUT OPPOSITE.
3. FOR FANS SIZE 122-330 WITH INLET BOX AT
90 DEGREES OR 270 DEGREES, USE “BAU”
DISCHARGE DIMENSION “DF” FOR CENTERLINE
HEIGHT.
CW BAU
DD
O.D.
INLET
C
NOTE 3 NOTE 3 NOTE 3
N
BASE ANGLES
BA
GA. SCROLL
GB
A
B
J
CL
FAN SHAFT
DIMENSIONS ARE NOT TO BE USED FOR CONSTRUCTION. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
11.31
12.44
13.88
15.19
16.81
18.44
20.56
22.50
24.81
27.50
30.25
HD
10.00
11.06
12.19
13.44
14.75
16.13
17.88
19.63
21.56
23.94
26.31
B
CW TAD
CW UBD
CW THD
HC
SE
KL
DIA. SHAFT
SD
HC
Q
H
O (TA M
NL D
Y)
HL
8.19
8.88
9.56
10.38
11.94
12.75
14.00
15.25
16.69
18.81
20.69
G
CL
DISCH.
HA
SIZE
CW DBD
GC
GA. SIDES
GA
HE
OUTSIDE
HOUSING
45
HG
DC
HQ
HP
DA
HE
G
40.75
44.69
49.19
54.00
59.94
66.06
72.25
79.75
87.94
96.63
HC
SIZE
365
402
445
490
542
600
660
730
807
890
A
39.00
42.94
47.44
52.25
57.69
63.81
70.00
77.50
85.69
94.38
365
402
445
490
542
600
660
730
807
890
DB
HD
HF
33.69
37.13
41.06
45.00
49.94
55.13
60.56
67.06
74.19
81.69
HD
22.25
25.44
28.94
31.25
33.94
37.06
40.25
43.75
48.19
51.38
AH
CL
DISCH.
SIZE
CW DBD
GC
GA. SIDES
GA
HA
Twin City Bulletin 300
HF
x
x
x
x
x
x
x
x
x
x
BA
4.0
5.0
6.0
6.0
6.0
6.0
6.0
6.0
6.0
6.0
29.75
32.75
36.13
39.81
44.06
48.75
53.50
59.25
65.50
72.19
3.0
3.5
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
27.88
30.69
33.88
37.31
41.31
45.69
50.06
55.50
61.38
67.63
HG
0.81
0.81
0.81
0.81
0.81
0.81
0.81
0.81
0.81
0.81
BH
HD
HH
OUTS.
HSG.
HL
29.00
32.00
35.58
39.00
43.06
47.69
52.44
58.00
64.19
70.00
NOTE 3
DA
H
DB
38.31
40.69
45.75
49.25
53.69
58.25
62.88
68.50
73.81
81.56
HM
29.25
31.75
36.25
38.75
42.25
45.00
49.50
54.25
59.50
65.50
NOTE 3
HQ
HC
42.75
47.69
53.19
58.00
63.44
69.56
75.75
83.25
91.44
100.13
HP
29.50
33.00
35.50
39.00
43.50
48.00
52.50
57.00
63.00
69.25
DC
60.38
66.38
73.00
80.38
88.50
97.13
HQ
31.50
35.25
38.50
42.25
46.50
51.25
55.75
61.75
67.50
73.75
DD
CW UBD
DE
HA
HG
O.D.
INLET
C
NOTE 3 NOTE 3
N
BASE ANGLES
BA
GB
A
B
GA. SCROLL
26.00 55.88
28.63 60.44
31.63 67.13
34.81 73.00
38.56 80.31
42.63 87.69
46.63 95.50
51.75 104.88
57.25 114.38
63.06 126.00
HH
38.50
42.44
46.88
51.63
57.13
63.13
69.38
76.75
84.88
93.38
C
CW TAU
KWY
SIZE
KS
DX
DISCH.
FLANGE
J
FAN HSG.
CL
BH
DIA. BASE
HOLES
AH
DBD ONLY
FOUNDATION PLAN
M
DE
19.56
22.06
24.75
26.44
28.56
30.81
33.25
35.94
38.94
42.13
J
33.50
37.00
40.00
44.00
49.00
54.00
59.00
64.50
72.00
78.25
NOTE 3
HB
DF
16.69
18.69
20.88
22.56
24.69
26.94
29.38
32.06
35.06
38.25
K
35.50
39.50
43.25
47.50
52.25
57.50
63.00
69.50
76.50
85.00
DF
HH
9.0
10.0
10.0
11.0
11.0
12.0
12.0
13.5
13.5
14.0
KL
41.50
46.00
50.50
55.75
61.25
67.25
73.75
81.25
89.50
98.25
DG
CW BAU
HF
0.88
0.88
1.00
1.00
1.00
1.25
1.25
1.25
1.25
1.50
x
x
x
x
x
x
x
x
x
x
KS
0.44
0.44
0.50
0.50
0.50
0.63
0.63
0.63
0.63
0.75
2.00
2.00
2.00
2.00
2.50
2.50
2.50
2.50
2.50
2.50
DX
HA
G
23.00
24.50
28.00
30.00
30.00
33.00
35.00
38.00
41.00
44.00
L
49.00
52.50
57.50
62.50
68.00
74.00
81.00
89.00
96.50
107.50
SP
1.88
2.38
2.88
2.88
2.88
2.88
2.88
2.88
2.88
2.88
N
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
GB
51.56
56.06
61.75
66.44
68.56
74.81
79.25
86.44
92.44
99.13
P
24.50
26.25
28.75
31.25
34.00
37.00
40.50
44.50
48.25
53.75
GC
ACCESSORIES REQ'D.
CFM
CLASS
S.O. NO.
CERT. BY.
19.25
21.25
23.50
25.88
28.63
31.69
34.75
38.50
42.63
46.94
Q
60.13
66.13
74.50
79.88
84.13
91.63
98.50
106.88
115.88
125.25
H
RPM
DISCH.
BHP
3.437
3.437
3.937
3.937
4.437
4.937
4.937
5.437
5.437
5.937
SD
29.00
32.00
35.38
39.00
43.06
47.69
52.44
58.00
64.19
70.00
HA
ROT.
HB
10.0
11.0
11.0
12.0
12.0
13.0
13.0
14.5
14.5
15.0
SE
49.31
54.25
59.81
65.75
72.81
80.44
88.19
97.38
107.56
117.81
MTR. LOC.
365
402
445
490
542
600
660
730
807
890
SIZE
365
402
445
490
542
600
660
730
807
890
SIZE
OV
8-16-82
TS
UNIT NO.
REVISED 7-15-05
DWG. NO. AC-9250F
DRAWN
SWSI NON-ROTATABLE
MTR. HP
MINNEAPOLIS, MINNESOTA 55442
ENG./ARCH.
18.63
19.88
21.38
23.88
26.63
29.63
32.63
36.63
40.38
45.88
M
JOB:
LOC.
ARR. NO. 1
TWIN CITY FAN & BLOWER
"BCE", "BAE", "BC" & "BAF"
CLASS IV
SIZE
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
GA
CW BHD
DG
HG
HE
NOTES:
1. DISCHARGE ANGLES ARE INCLUDED ON ALL
DISCHARGES.
2. "CW" ROTATION IS SHOWN. "CCW" ROTATION IS
SIMILAR BUT OPPOSITE.
3. FOR FANS WITH INLET BOX AT 90 DEGREES OR
270 DEGREES, USE “BAU” DISCHARGE DIMENSION
“DF” FOR CENTERLINE HEIGHT.
L
K
K
M
DIMENSIONS ARE NOT TO BE USED FOR CONSTRUCTION. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
31.63
34.81
38.38
42.31
46.81
51.81
56.94
63.00
69.63
76.75
HE
29.13
32.06
35.44
38.88
43.13
47.56
52.44
57.81
63.88
70.25
B
CW TAD
DD
HB
CW THD
H
O (TA M
NL D
Y)
HL
SD
SE
KL
DIA. SHAFT
Q
HC
P
OUTSIDE
HOUSING
HE
CL
FAN SHAFT
46
CE
DC
GA. SIDES
GA
GC
HE
A
13.00
14.31
15.88
17.44
19.38
21.19
23.56
25.94
28.63
GD
18.50
19.75
21.50
24.25
26.00
28.00
31.25
33.50
36.00
122
135
150
165
182
200
222
245
270
SIZE
122
135
150
165
182
200
222
245
270
HJ
HE
CJ
BA
DG
HG
42.25
38.88
35.63
32.50
30.00
27.63
24.50
22.50
20.50
Twin City Bulletin 300
20.44
18.50
16.81
15.19
13.81
12.50
11.38
10.25
9.31
HG
0.56
0.56
0.56
0.56
0.44
0.44
0.44
0.44
0.44
BH
CE
20.94
19.00
17.19
15.31
14.00
12.63
11.44
10.25
9.25
HJ
50.56
45.88
41.50
37.38
34.06
30.88
28.06
25.50
23.19
CW UBD
A
HG
28.56
25.88
23.50
21.13
19.31
17.38
15.81
14.25
12.94
HN
44.13
40.00
36.25
32.62
29.69
26.76
24.32
21.88
19.81
CF
G
CK
GC
HN
N
GB
GA. SCROLL
KWY SIZE
KS
P
H
23.50
21.81
19.56
17.78
16.63
15.44
14.38
12.44
24.31
22.31
20.63
18.56
16.75
15.56
14.38
13.38
12.38
J
CL II
J
CL I
11.44
54.75
50.75
46.88
42.12
38.50
35.62
33.13
30.63
28.63
53.00
49.62
44.62
40.63
38.13
35.25
33.13
28.69
26.69
CG
CL II
CG
CM
CL I
DE
HJ
(NOTE 4)
BA
OUTSIDE
BHOUSING
J
BASE ANGLES
CG
C
L
FAN SHAFT
BH
DIA. BASE
HOLES
C
L
FAN HSG.
K
20.25
18.56
16.94
15.38
14.13
12.94
11.63
10.63
9.63
K
51.44
46.75
42.81
38.69
35.31
32.00
29.38
26.50
24.31
CJ
5.00
5.00
4.50
4.00
4.00
3.50
3.50
3.00
3.00
KL
49.00
44.38
40.31
36.31
33.13
29.88
27.19
24.50
22.25
CK
CL II
KS
22.00
20.00
18.00
16.25
14.75
13.50
12.25
11.25
10.25
DC
DE
9.63
8.75
8.25
7.38
6.75
.50 x .25 .63 x .31 14.13
.50 x .25 .63 x .31 12.88
.50 x .25 .63 x .31 11.75
.38 x .19 .50 x .25 10.63
.38 x .19 .50 x .25
.38 x .19 .50 x .25
.38 x .19 .38 x .19
.25 x .13 .38 x .19
M
24.75
22.50
20.50
18.25
16.75
15.25
14.00
12.75
11.50
.25 x .13 .38 x .19
CL I
KS
45.69
41.50
37.69
33.56
30.75
27.88
25.44
23.00
20.75
CM
0.88
0.88
0.88
0.88
0.88
0.88
0.63
0.63
0.63
N
31.00
28.25
26.00
23.50
21.50
19.50
18.00
16.25
15.00
DG
SP
DISCH.
14
14
14
12
12
12
12
12
21.00
22.75
24.25
26.00
28.00
31.25
33.50
36.00
29.50
27.81
25.06
22.75
21.50
19.81
18.75
16.25
15.25
CL I
30.44
28.44
26.25
23.56
21.75
20.06
18.75
17.25
16.25
CL II
P
14
19.75
P
GA
G
14.25
12.94
11.75
10.56
9.63
8.69
7.88
7.13
6.44
Q
14
14
14
14
14
14
14
14
14
GB
ACCESSORIES REQ'D.
CFM
SIZE
S.O. NO.
CERT. BY:
2.187
2.187
1.937
1.687
1.687
1.437
1.437
1.187
1.187
CL I
SD
18.00
16.75
15.63
14.00
13.00
12.13
11.38
10.50
9.88
GC
RPM
ROT.
2.687
2.437
2.437
2.187
1.937
1.937
1.687
1.687
1.437
CL II
SD
270
245
222
200
182
165
150
135
122
SIZE
270
245
222
200
182
165
150
135
122
SIZE
BHP
UNIT NO.
TWIN CITY FAN & BLOWER
MINNEAPOLIS, MINNESOTA
ENG./ARCH.
LOC.
JOB:
NOTES:
1. INLET BEARING BAR SUPPORTS ARE REMOVABLE.
2. "CW" ROTATION IS SHOWN. "CCW" ROTATION IS
SIMILAR BUT OPPOSITE.
3. FOR OPTIONAL FLANGED OUTLET AND DOWNBLAST
DISCHARGE SEE DWG. AC14895.
4. BEARING BAR SUPPORTS MAY EXTEND BEYOND BASE
ANGLES. SEE DWG. AC1000648 FOR DIMENSIONS IF
SPACE LIMITATIONS ARE REQUIRED FOR MOUNTING FAN.
FOUNDATION PLAN
M
M
K
OV
TS
DWG. NO. AC14967D
REVISED 7-15-05
DRAWN 5-5-94
"BCE", "BAE", "BC", "BAF" & "NFC" ARR. 3 DWDI NON-ROTATABLE
CLASS I & II
DIMENSIONS ARE SUBJECT TO CHANGE. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
23.19
21.00
19.06
17.31
15.69
14.13
12.88
11.63
10.56
HE
38.25 2.0 x 2.0
34.81 2.0 x 2.0
31.63 2.0 x 2.0
28.50 1.5 x 2.0
26.00 1.5 x 2.0
23.56 1.5 x 2.0
21.44 1.5 x 1.5
19.44 1.5 x 1.5
H
KL
DIA. SHAFT
SD
CW THD
Q
HN
17.44 1.5 x 1.5
B
GC
GD
CF
CL
DISCH.
HJ
SIZE
CW BHD
GD
CF
OUTSIDE
HOUSING
47
542
TO
730
CE
DC
HQ
A
31.81
35.13
38.69
42.63
47.13
51.94
57.38
63.50
69.69
77.25
H
47.75
51.75
56.88
63.25
69.13
75.50
85.00
93.00
103.75
113.38
300
330
365
402
445
490
542
600
660
730
SIZE
300
330
365
402
445
490
542
600
660
730
G
CF
SIZE
GC
GA. SIDES
GA
HF
25.75
28.38
31.50
34.69
38.25
42.19
46.69
51.69
56.81
62.88
HE
42.69
46.69
51.81
57.19
63.13
69.44
76.94
85.00
93.69
103.38
B
BA
CF
22.75
25.00
27.75
30.56
33.75
37.19
41.19
45.56
49.94
55.38
HG
Q
HE
CJ
Twin City Bulletin 300
31.75
35.06
38.63
42.56
47.06
51.88
57.31
63.44
69.63
77.13
HN
57.75
63.56
69.63
77.06
84.06
92.88
103.25
113.75
124.75
136.75
HQ
HN
59.75
65.75
72.25
79.75
HQ
49.06
54.13
60.00
66.19
73.13
80.69
89.25
98.88
108.75
120.38
CF
CW UBD
N
GB
CK
BA
B OUTS.
HSG.
J
26.25
28.25
31.13
33.50
36.44
39.94
43.75
48.88
53.25
58.81
J
CL 1
59.13
63.13
68.88
74.13
80.00
88.00
94.75
107.07
115.81
128.00
CG
CL 1
HG
26.25
28.25
31.13
33.81
36.56
41.13
44.19
49.63
54.06
58.81
J
CL II
59.13
63.13
68.88
74.75
80.37
90.57
95.69
108.63
117.44
128.00
CG
CM
CL II
DE
HJ
DY
(NOTE 4)
BASE ANGLES
H
CG
A
GA. SCROLL
KWY. SIZE
KS
P
CL
FAN HSG.
FAN SHAFT
FOUNDATION PLAN
M
CL
BH
DIA. BASE
HOLES
K
22.75
24.75
27.31
30.25
33.19
36.38
40.63
44.63
49.50
54.31
K
57.00
62.25
68.75
76.06
83.75
91.94
101.44
111.81
123.19
136.13
CJ
5.50
5.50
5.50
6.00
6.00
7.00
6.00
8.00
8.00
9.00
KL
56.00
61.56
67.88
74.62
82.31
91.07
100.94
111.31
122.19
135.13
CK
.63x.31
.63x.31
.63x.31
.63x.31
.63x.31
.63x.31
.75x.38
.88x.44
.88x.44
1.00x.50
KS
CL 1
51.81
56.75
62.00
68.50
74.88
82.50
91.56
101.19
110.94
122.00
CM
.63x.31
.63x.31
.63x.31
.63x.31
.75x.38
.88x.44
.88x.44
1.00x.50
1.00x.50
1.00x.50
KS
CL II
24.50
27.00
29.50
33.00
35.50
39.00
43.50
48.00
52.50
57.00
DC
15.88
17.38
18.88
20.88
22.88
25.38
27.63
30.63
33.13
37.13
M
28.50
31.00
33.50
37.00
40.00
44.00
49.00
54.00
59.00
64.50
DE
NOTES:
1. INLET BEARING BAR SUPPORTS ARE REMOVABLE.
2. "CW" ROTATION IS SHOWN. "CCW" ROTATION IS
SIMILAR BUT OPPOSITE.
3. FOR OPTIONAL FLANGED OUTLET CONNECTION
AND DOWNBLAST DISCHARGE SEE AC14896.
4. BEARING BAR SUPPORTS MAY EXTEND BEYOND
BASE ANGLES. SEE AC1000648 FOR DIMENSIONS
IF SPACE LIMITATIONS ARE REQUIRED FOR
MOUNTING FAN.
300
TO
490
CE
M
K
SP
1.13
1.13
1.13
1.38
1.38
1.38
1.88
1.88
2.38
2.38
N
34.25
37.25
41.00
45.50
50.00
54.75
60.25
6z6.25
73.25
80.75
DG
32.88
34.88
37.75
40.63
43.56
48.06
51.00
58.19
62.56
69.19
P
CL 1
1.25
1.50
1.50
1.50
1.50
1.50
1.50
1.50
1.50
1.50
DY
32.88
34.88
37.75
40.94
43.81
49.44
51.50
59.00
63.38
69.19
P
CL II
41.00
44.00
48.00
52.50
56.50
61.50
67.00
73.00
80.00
88.00
G
DISCH.
ACCESSORIES REQ'D.
CFM
SIZE
S.O. NO.
CERT. BY:
15.81
17.50
19.25
21.25
23.50
25.88
28.63
31.69
34.75
38.50
Q
10
10
10
10
10
10
10
10
10
10
GA
RPM
ROT.
2.437
2.437
2.687
2.437
2.437
2.687
2.937
3.437
3.437
3.937
SD
2.437
2.437
2.687
2.687
2.937
3.437
3.437
3.937
3.937
3.937
SD
CL II
20.50
22.00
24.00
26.25
28.25
30.75
33.50
36.50
40.00
44.00
GC
UNIT NO.
BHP
CL 1
12
12
12
12
12
12
12
12
12
10
GB
MINNEAPOLIS, MINNESOTA 55442
TWIN CITY FAN & BLOWER
ENG./ARCH.
LOC.
JOB:
CLASS I & II
5-5-94
OV
TS
REVISED 1-30-07
DWG. NO. AC14968F
DRAWN
"BAE", "BC", "BAF" & "NFC" ARR. NO. 3 DWDI NON-ROTATABLE
DIMENSIONS ARE SUBJECT TO CHANGE. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
23.31
25.75
28.50
31.50
34.88
38.50
42.56
47.19
51.94
57.50
HJ
0.56
0.56
0.56
0.81
0.81
0.81
0.81
0.81
0.81
0.81
BH
DG
HG
CE
KL
DIA. SHAFT
SD
HN
DY
CW THD
2.5x2.5
2.5x2.5
2.5x2.5
3.0x3.0
3.0x3.0
3.0x3.0
3.0x4.0
3.0x4.0
3.5x5.0
3.5x5.0
HJ
CW BHD
DY
CL
DISCH.
HJ
OUTSIDE
HOUSING
48
49
Twin City Bulletin 300
90.06
74.00
807
982
HD
SIZE
81.56
104.00
982
890
85.44
94.13
807
AH
DB
DA
47.06
84.63
76.63
69.50
HE
53.75
50.25
HF
79.56
72.06
65.38
HF
139.19
126.13
114.31
HC
74.50
67.50
61.25
HG
4.0x6.0
3.5x5.0
3.5x5.0
BA
N
69.44
62.94
57.13
HH
0.81
0.81
0.81
BH
140.06
125.38
113.69
HL
77.75
70.00
64.19
DA
DB
91.75
80.75
73.00
HM
71.50
65.50
59.50
HH
GB
GA. SCROLL
KWY SIZE
KS
P
J
H
109.75
99.00
90.31
HP
76.50
69.25
63.00
DC
CW UBD
HQ
HC
106.75
96.50
87.75
HQ
80.00
73.75
67.50
DD
HG
BASE ANGLES
OUTSIDE
HOUSING
BA
B
(NOTE 5)
A
OUTSIDE
HOUSING
DE
HB
76.50
77.81
70.19
78.44
71.50
65.56
J
CL II
J
CL I
64.31
92.00
85.00
86.50
78.25
DF
CW BAU
72.00
DE
HA
M
AH
DBD ONLY
FOUNDATION PLAN
M
BH
DIA. BASE
HOLES
C
L
FAN HSG.
72.75
65.69
59.81
K
108.25
97.81
89.00
DG
HF
DF
HH
9.0
9.0
9.0
KL
2.50
2.50
2.50
DX
G
HE
M
7
7
10
GA
DG
HG
1.25x.63 53.13
1.00x.50 46.38
1.00x.50 40.88
KS
122.00
106.50
95.50
CW BHD
HA
NOTES:
1. FOR SLIP CONNECTION ON DISCHARGE, CONTACT
FACTORY FOR DWG. AC15864.
2. INLET BEARING BAR SUPPORTS ARE REMOVABLE.
3. "CW" ROTATION IS SHOWN. "CCW" ROTATION IS
SIMILAR BUT OPPOSITE.
4. FRAME SUPPORTS VARY IN CONSTRUCTION BY
SIZE AND BY DISCHARGE POSITION.
5. BEARING BAR SUPPORTS MAY EXTEND BEYOND
BASE ANGLES. SEE DWG. AC1000648 FOR
DIMENSIONS IF SPACE LIMITATIONS ARE REQUIRED
FOR MOUNTING FAN.
K
K
SP
CLASS
2.88
2.38
2.38
N
7
10
10
GB
88.31
80.56
74.69
CL I
P
61.00
53.25
47.75
GC
95.50
88.88
82.00
75.44
CL II
P
122.00
106.50
H
ROT.
51.81
46.94
42.63
Q
151.25
136.13
124.38
RPM
DISCH.
GD
ACCESSORIES REQ'D.
CFM
SIZE
S.O. NO.
CERT. BY:
ENG./ARCH.
LOC.
JOB:
4.937
3.937
3.937
CL I
SD
77.75
70.00
64.19
HA
BHP
5.437
4.437
4.437
CL II
SD
130.13
117.75
TS
982
890
807
SIZE
106.31
96.50
87.81
HC
UNIT NO.
107.50
HB
OV
7-15-05
982
890
807
SIZE
DWG. NO. AC9258E
8-16-82
REVISED
CLASS I & II
DRAWN
NON-ROTATABLE
MTR. LOC.
MINNEAPOLIS, MINNESOTA
DWDI
TWIN CITY FAN & BLOWER
"BCE", "BAE", "BC" & "BAF" ARR. 3
DIMENSIONS ARE SUBJECT TO CHANGE. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
CW TAU
DD
HB
HD
DIA. SHAFT
KL
SD
DX
DISCH
FLANGE
CW THD
NOTE 4
Q
HM
(
O TAD
NL
Y)
HL
CL
DISCH.
HA
B
CW TAD
HD
G
HE
GC
890
A
HP
SIZE
CW DBD
HG
DC
HQ
GA. SIDES
GA
HE
C
L FAN SHAFT
CW
UBD
BS
DC
HN
DE
HJ
GA
GA. SIDES
A
13.00
14.31
15.88
17.44
19.38
21.19
23.56
25.94
28.63
J
11.44
12.44
14.38
15.44
16.63
17.88
19.56
21.81
23.50
122
135
150
165
182
200
222
245
270
SIZE
122
135
150
165
182
200
222
245
270
GA. SCROLL
GB
KWY SIZE
KS
DIA. SHAFT
KL
SD
Twin City Bulletin 300
3.00
3.00
3.50
3.50
4.00
4.00
4.50
5.00
5.00
KL
DC
UA
VA
.25x.13
.25x.13
.38x.19
.38x.19
.38x.19
.38x.19
.50x.25
.50x.25
.50x.25
DE
B
M
THD
6.13
6.75
7.63
9.13
10.00
11.00
12.63
15.25
16.50
184T
184T
213T
215T
254T
254T
254T
256T
256T
14
14
14
14
12
12
12
12
12
GA
J
M
UBD
8.38
9.00
9.88
10.63
11.50
12.50
14.13
15.25
16.50
HN
GC
FR
H
HSG. C
L
OUTS.
HSG.
12.38
13.00
13.88
15.13
16.69
18.31
20.06
22.00
24.19
A
M
DBD
13.00
14.25
15.88
17.38
19.38
21.13
24.00
26.38
29.13
12.38
13.00
13.88
14.63
15.50
16.50
18.63
19.75
21.44
KS
12.38
13.00
13.88
14.63
15.50
16.50
18.63
19.75
21.00
DA
P
MD
DBD
23.00
23.88
28.13
29.25
34.25
35.50
37.25
38.88
40.75
14
14
14
14
14
14
14
14
14
GB
HJ
C
L
C
L
HSG.
M
FAN SHAFT
C
L
FOUNDATION PLAN
MOTOR SHAFT
S1
S3
MD
S2
S4
CFM
SIZE
S.O. NO.
SP
DISCH.
CERT. BY:
ENG./ARCH.
LOC.
JOB:
RPM
ROT.
MD
THD
24.25
25.25
29.63
30.88
36.00
37.75
39.50
41.38
43.50
GC
DBD
16.00
17.25
18.88
20.38
22.38
24.13
27.00
29.38
32.13
MD
UBD
26.13
27.38
32.00
33.13
39.00
40.75
43.13
45.25
47.63
GC
THD
9.13
9.75
10.63
12.13
13.00
14.00
15.63
18.25
19.50
15.25
16.25
18.75
19.81
21.50
22.75
25.06
27.81
29.50
P
GC
UBD
11.38
12.00
12.88
13.63
14.50
15.50
17.13
18.25
19.50
6.44
7.13
7.88
8.69
9.63
10.56
11.75
12.94
14.25
Q
H
DBD
28.00
30.00
32.00
34.13
36.50
39.00
42.38
45.63
49.00
1.187
1.187
1.437
1.437
1.687
1.687
1.937
2.187
2.187
SD
H
THD/UBD
24.00
26.00
28.00
30.13
32.50
35.00
40.38
43.63
47.00
19.63
20.50
23.63
24.75
28.38
29.63
31.38
33.00
34.88
UA
10.56
11.63
12.88
14.13
15.69
17.31
19.06
21.00
23.19
HE
20.88
21.88
25.13
26.38
30.13
31.88
33.63
35.50
37.63
UC
UE
VA
27.25
28.25
32.63
33.88
39.00
40.75
42.50
44.38
46.50
VC
HJ
THD/UBD
9.25
10.25
11.44
12.63
14.00
15.31
17.19
19.00
20.94
26.00
26.88
31.13
32.25
37.25
38.50
40.25
41.88
43.75
HJ
DBD
13.88
14.50
15.38
16.13
17.00
18.00
20.13
21.25
22.50
22.75
24.00
27.50
28.63
33.13
34.88
37.25
39.38
41.75
9.31
10.25
11.38
12.50
13.81
15.19
16.81
18.50
20.44
HG
OV
TS
DWG. NO. AC16026B
REVISED 7-15-05
DRAWN 10-27-98
CW – POSITION "Z"
CCW – POSITION "W"
29.13
30.38
35.00
36.13
42.00
43.75
46.13
48.25
50.63
VE
12.94
14.25
15.81
17.38
19.31
21.13
23.50
25.88
28.56
HN
122
135
150
165
182
200
222
245
270
SIZE
122
135
150
165
182
200
222
245
270
SIZE
FACTORY FOR BHD AND
OTHER UBD ORIENTATIONS.
BHP
UNIT NO.
MINNEAPOLIS, MINNESOTA
TWIN CITY FAN & BLOWER
"BCE", "BAE", "BC" & "BAF" ARR. 3F, DWDI, CLASS I
NON-ROTATABLE
NOTES:
1. "CW" ROTATION, MOTOR POSITION "Z" SHOWN. ACCESSORIES REQ'D.
"CCW" ROTATION, MOTOR POSITION "W" IS
SIMILAR BUT OPPOSITE.
2. STANDARD ARR. 3F MOTOR LOCATION ON
LEFT FOR "CW" ROTATION UNITS AND ON
RIGHT FOR “CCW" ROTATION. DIMENSION "FR"
EQUALS MAX. MOTOR FRAME.
3. FOR OPTIONAL FLANGED OUTLET, CONTACT
FACTORY FOR DWG. AC16038.
4. SEE ES4-98 FOR POINT LOADS AT LOCATION
"S1," "S2," ETC.
NOTE: CONTACT
K
K
BH
DIA. BASE
HOLES
DIMENSIONS ARE SUBJECT TO CHANGE. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
K
THD/UBD
10.63
11.63
12.63
13.69
14.88
16.13
18.31
19.94
21.63
4.00
4.00
4.00
4.00
4.00
4.00
5.00
5.00
5.00
BS
CW
DBD
DA
HE
CW THD
Q
K
DBD
12.75
13.75
14.75
15.81
17.00
18.25
19.94
21.56
23.25
BH
C
L
DISCH
0.69
0.69
0.69
0.69
0.69
0.69
0.69
0.69
0.69
B
GC
HJ
17.44
19.44
21.44
23.56
26.00
28.50
31.63
34.81
38.25
GC
HG
SIZE
UE
VE
HN
UC
VC
HE
OUTS.
HSG.
50
51
Twin City Bulletin 300
A
31.81
35.13
38.69
42.63
47.13
51.94
J
26.25
28.25
31.13
33.50
36.44
39.94
300
330
365
402
445
490
SIZE
300
330
365
402
445
490
DE
HJ
DY
SIZE
CW
UBD
BS
DC
HC
GA
0.69
0.69
0.81
0.81
0.81
0.81
K
THD/UBD
23.88
25.88
28.94
31.63
34.56
37.75
K
DBD
25.50
27.50
30.06
32.75
35.69
38.88
BH
GC
HG
42.69
46.69
51.81
57.19
63.13
69.44
B
UE
VE
HC
HN
UC
VC
GA. SIDES
5.50
5.50
5.50
6.00
6.00
7.00
KL
5.00
5.00
6.00
6.00
6.00
6.00
BS
GC
HJ
0.63
0.63
0.63
0.63
0.63
0.63
x
x
x
x
x
x
GB
GA. SCROLL
M
THD/UBD
18.50
20.00
22.50
24.25
26.25
28.75
26.75
29.38
32.50
35.69
39.25
43.19
DE
UA
VA
MD
DBD
45.63
47.75
54.13
56.75
64.00
66.75
1.25
1.50
1.50
1.50
1.50
1.50
DY
H
HSG. CL
A
OUTS.
HSG.
MD
THD
48.63
51.00
57.88
60.63
68.38
71.63
284T
286T
324T
326T
364T
365T
FR
HN
GC
B
J
MD
UBD
53.00
55.63
63.13
66.25
74.38
78.13
10
10
10
10
10
10
GA
HJ
CL
HSG.
S5
CL
S6
CL
M
FAN SHAFT
MF
FOUNDATION PLAN
MOTOR SHAFT
S1
S3
MD
S2
S4
SIZE
S.O. NO.
DISCH.
CERT. BY:
ENG./ARCH.
LOC.
JOB:
MF
DBD
—
—
—
—
7.94
6.94
12
12
12
12
12
12
GB
MF
UBD
—
—
—
—
—
24.69
GC
DBD
35.25
38.63
42.63
46.63
51.13
55.88
32.88
34.88
37.75
40.63
43.56
48.06
P
GC
THD/UBD
21.50
23.00
25.50
27.25
29.25
31.75
Q
15.81
17.50
19.25
21.25
23.50
25.88
UA
38.75
40.88
45.75
48.38
54.25
57.00
SD
H
THD/UBD
51.50
55.50
62.63
68.00
73.88
80.25
2.437
2.437
2.687
2.437
2.437
2.687
H
DBD
53.50
57.50
62.63
68.00
73.88
80.25
BHP
UNIT NO.
OV
DRAWN 10-27-98
TS
41.75
44.13
49.50
52.25
58.63
61.88
46.13
48.75
54.75
57.88
64.63
68.38
UE
25.75
28.38
31.50
34.69
38.25
42.19
33.25
36.56
40.13
44.06
48.56
53.88
UC
HE
HC
48.63
50.75
57.13
59.75
67.00
69.75
VA
22.75
25.00
27.75
30.56
33.75
37.19
HG
51.63
54.00
60.88
63.63
71.38
74.63
VC
HJ
DBD
24.50
26.00
29.00
31.50
34.88
38.50
56.00
58.63
66.13
69.25
77.38
81.13
VE
HJ
THD/UBD
23.31
25.75
28.50
31.50
34.88
38.50
HN
300
330
365
402
445
490
SIZE
31.75
35.06
38.63
42.56
47.06
51.88
300
330
365
402
445
490
SIZE
DWG. NO. AC16027C
REVISED 7-15-05
NOTE: SEE DRAWING 16028 FOR SIZES 542–660.
CONTACT FACTORY FOR BHD AND OTHER
UBD ORIENTATIONS.
RPM
ROT.
MINNEAPOLIS, MINNESOTA
TWIN CITY FAN & BLOWER
"BCE", "BAE", "BC" & "BAF" ARR. 3F, DWDI, CLASS I CW – POSITION "Z"
CCW – POSITION "W"
NON-ROTATABLE
CFM
SP
NOTES:
1. "CW" ROTATION, MOTOR POSITION "Z" SHOWN.
"CCW" ROTATION, MOTOR POSITION "W" IS
ACCESSORIES REQ'D.
SIMILAR BUT OPPOSITE.
2. STANDARD ARR. 3F MOTOR LOCATION ON LEFT
FOR "CW" ROTATION UNITS AND ON RIGHT FOR
"CCW" ROTATION. DIMENSION "FR" EQUALS
MAX. MOTOR FRAME.
3. FOR OPTIONAL FLANGED OUTLET, CONTACT
FACTORY FOR DWG. AC16039.
4. DIMENSION "MF" APPLIES ONLY WHEN SIX (6)
MOUNTING BRACKETS ARE REQUIRED.
5. SEE ES4-98 FOR POINT LOADS AT LOCATION
"S1," "S2," ETC.
K
K
BH
DIA. BASE
HOLES
DIMENSIONS ARE SUBJECT TO CHANGE. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
M
DBD
32.25
35.63
39.63
43.63
48.13
52.88
23.75
26.00
28.75
31.56
34.75
38.19
DC
DA
HE
0.31
0.31
0.31
0.31
0.31
0.31
23.00
24.50
27.50
30.00
33.38
37.00
KS
KS
KWY SIZE
CW THD
CW
DBD
DA
SD
KL
DIA. SHAFT
HN
Q
DISCH
C
L
DY
P
OUTS.
HSG.
CW
UBD
BS
DC
HN
DE
HJ
GA. SIDES
GA
12.38
13.38
14.38
15.56
16.75
18.56
20.63
22.31
24.31
122
135
150
165
182
200
222
245
270
K
THD/UBD
10.63
11.63
12.63
13.69
14.88
16.13
18.31
19.94
21.63
K
DBD
12.75
13.75
14.75
15.81
17.00
18.25
19.94
21.56
23.25
J
SIZE
4.00
4.00
4.00
4.00
4.00
4.00
5.00
5.00
5.00
BS
Twin City Bulletin 300
DC
A
M
DBD
13.00
14.25
15.88
17.38
19.38
21.13
24.00
26.38
29.13
12.38
13.00
13.88
15.13
16.69
18.31
20.06
22.00
24.19
DE
UA
VA
.38x.19
.38x.19
.38x.19
.50x.25
.50x.25
.50x.25
.63x.31
.63x.31
.63x.31
KS
P
B
M
UBD
8.38
9.00
9.88
10.63
11.50
12.50
14.13
15.25
16.50
14
14
14
14
12
12
12
12
12
GA
HN
GC
M
THD
6.13
6.75
7.63
9.13
10.00
11.00
12.63
15.25
16.50
215T
254T
254T
256T
284T
284T
286T
324T
326T
FR
H
HSG. C
L
OUTS.
HSG.
J
14
14
14
14
14
14
14
14
14
GB
HJ
FOUNDATION PLAN
CL
FAN SHAFT
CL
M
MOTOR SHAFT
S1
CL
HSG.
MD
S2
S4
MD
DBD
26.13
30.63
31.75
32.88
36.75
38.00
39.75
45.00
46.88
GC
DBD
16.00
17.25
18.88
20.38
22.38
24.13
27.00
29.38
32.13
MD
THD
27.38
32.00
33.25
34.50
38.50
40.25
42.00
47.50
49.63
GC
THD
9.13
9.75
10.63
12.13
13.00
14.00
15.63
18.25
19.50
MD
UBD
29.25
34.13
35.63
36.75
41.50
43.25
45.63
51.38
54.00
GC
UBD
11.38
12.00
12.88
13.63
14.50
15.50
17.13
18.25
19.50
16.25
17.25
18.75
20.06
21.75
23.56
26.25
28.44
30.44
P
H
DBD
28.00
30.00
32.00
34.13
36.50
39.00
42.38
45.63
49.00
6.44
7.13
7.88
8.69
9.63
10.56
11.75
12.94
14.25
Q
21.63
24.75
25.88
27.00
29.88
31.13
32.88
36.63
38.50
UC
RPM
ROT.
BHP
UNIT NO.
OV
TS
DWG. NO. AC16032B
REVISED 7-15-05
DRAWN 10-27-98
CW – POSITION "Z"
CCW – POSITION "W"
UE
24.75
28.25
29.75
30.88
34.63
36.38
38.75
43.00
45.63
29.13
33.63
34.75
35.88
39.75
41.00
42.75
48.00
49.88
VA
HJ
THD/UBD
9.25
10.25
11.44
12.63
14.00
15.31
17.19
19.00
20.94
30.38
35.00
36.25
37.50
41.50
43.25
45.00
50.50
52.63
VC
12.94
14.25
15.81
17.38
19.31
21.13
23.50
25.88
28.56
HN
32.25
37.13
38.63
39.75
44.50
46.25
48.63
54.38
57.00
VE
122
135
150
165
182
200
222
245
270
SIZE
122
135
150
165
182
200
222
245
270
SIZE
NOTE: CONTACT FACTORY FOR BHD AND
OTHER UBD ORIENTATIONS.
HJ
DBD
13.88
14.50
15.38
16.13
17.00
18.00
20.13
21.25
22.50
22.88
26.13
27.38
28.63
31.63
33.38
35.13
39.13
41.25
9.31
10.25
11.38
12.50
13.81
15.19
16.81
18.50
20.44
10.56
11.63
12.88
14.13
15.69
17.31
19.06
21.00
23.19
UA
HG
SD
SP
DISCH.
ACCESSORIES REQ'D.
CFM
SIZE
S.O. NO.
CERT. BY:
LOC.
ENG./ARCH.
JOB:
MINNEAPOLIS, MINNESOTA
TWIN CITY FAN & BLOWER
"BCE", "BAE", "BC" & "BAF" ARR. 3F, DWDI, CLASS II
NON-ROTATABLE
HE
1.437
1.687
1.687
1.937
1.937
2.187
2.437
2.437
2.687
H
THD/UBD
24.00
26.00
28.00
30.13
32.50
35.00
40.38
43.63
47.00
NOTES:
1. "CW" ROTATION, MOTOR POSITION "Z" SHOWN.
"CCW" ROTATION, MOTOR POSITION "W" IS
SIMILAR BUT OPPOSITE.
2. STANDARD ARR. 3F MOTOR LOCATION ON LEFT
FOR "CW" ROTATION UNITS AND ON RIGHT
FOR "CCW" ROTATION. DIMENSION "FR"
EQUALS MAX. MOTOR FRAME.
3. FOR OPTIONAL FLANGED OUTLET, SEE DWG.
AC16044.
4. SEE ES4-98 FOR POINT LOADS AT LOCATION
"S1," "S2," ETC.
K
K
S3
DIA. BASE
HOLES
BH
DIMENSIONS ARE SUBJECT TO CHANGE. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
3.00
3.00
3.50
3.50
4.00
4.00
4.50
5.00
5.00
KL
12.38
13.00
13.88
14.63
15.50
16.50
18.63
19.75
21.00
DA
DA
HE
12.38
13.00
13.88
14.63
15.50
16.50
18.63
19.75
21.44
GA. SCROLL
GB
KWY SIZE
KS
DIA. SHAFT
KL
SD
CW THD
Q
DISCH
CW
DBD
CL
0.69
0.69
0.69
0.69
0.69
0.69
0.69
0.69
0.69
13.00
14.31
15.88
17.44
19.38
21.19
23.56
25.94
28.63
122
135
150
165
182
200
222
245
270
BH
GC
HJ
17.44
19.44
21.44
23.56
26.00
28.50
31.63
34.81
38.25
B
A
SIZE
HG
GC
HN
UE
VE
VC
UC
HE
OUTS.
HSG.
52
53
Twin City Bulletin 300
A
31.81
35.13
38.69
42.63
47.13
51.94
J
26.25
28.25
31.13
33.81
36.56
41.13
300
330
365
402
445
490
SIZE
300
330
365
402
445
490
DE
HJ
DY
SIZE
CW
UBD
BS
DC
HC
UC
0.69
0.69
0.81
0.81
0.81
0.81
K
THD/UBD
23.88
25.88
28.94
31.63
34.56
37.75
K
DBD
25.50
27.50
30.06
32.75
35.69
38.88
BH
GC
HG
42.69
46.69
51.81
57.19
63.13
69.44
B
UE
VE
HC
HN
VC
GA
GA. SIDES
5.50
5.50
5.50
6.00
6.00
7.00
KL
5.00
5.00
6.00
6.00
6.00
6.00
BS
GC
HJ
0.63
0.63
0.63
0.63
0.75
0.88
x
x
x
x
x
x
KS
GB
KWY SIZE
KS
M
DBD
32.25
35.63
39.63
43.63
48.13
52.88
M
THD/UBD
18.50
20.00
22.50
24.25
26.25
28.75
26.75
29.38
32.50
35.69
39.25
43.19
DE
UA
VA
MD
DBD
53.50
55.75
58.50
67.00
73.68
76.88
1.25
1.50
1.50
1.50
1.50
1.50
DY
FR
MD
THD
56.50
59.13
62.25
71.00
78.13
81.75
364T
365T
365T
405T
445T
445T
HN
GC
H
HSG. C
L
A
B OUTS.
HSG.
J
MD
UBD
61.25
64.13
67.63
77.13
84.63
88.75
10
10
10
10
10
10
GA
HJ
C
L
S5
C
L
HSG.
S6
C
L
M
FAN SHAFT
MF
FOUNDATION PLAN
MOTOR SHAFT
S1
S3
MD
S2
S4
MF
DBD
—
—
—
11.69
12.75
12.00
12
12
12
12
12
12
GB
MF
THD
—
—
—
—
—
26.50
GC
DBD
35.25
38.63
42.63
46.63
51.13
55.88
MF
UBD
—
—
—
—
29.19
30.00
GC
THD/UBD
21.50
23.00
25.50
27.25
29.25
31.75
P
32.88
34.88
37.75
40.94
43.81
49.44
Q
S.O. NO.
SP
RPM
ROT.
BHP
UNIT NO.
OV
DRAWN
10-27-98
TS
DWG. NO. AC16033C
REVISED 7-15-05
43.75
46.00
48.75
55.63
61.00
64.25
46.75
49.38
52.50
59.63
65.50
69.13
UC
25.75
28.38
31.50
34.69
38.25
42.19
33.25
36.56
40.13
44.06
48.56
53.88
UA
HE
HC
51.50
54.38
57.88
65.75
72.00
76.13
UE
22.75
25.00
27.75
30.56
33.75
37.19
HG
56.50
58.75
61.50
70.00
76.63
79.88
VA
HJ
DBD
24.50
26.00
29.00
31.50
34.88
38.50
59.50
62.13
65.25
74.00
81.13
84.75
VC
HJ
THD/UBD
23.31
25.75
28.50
31.50
34.88
38.50
64.25
67.13
70.63
80.13
87.63
91.75
VE
31.75
35.06
38.63
42.56
47.06
51.88
HN
300
330
365
402
445
490
SIZE
300
330
365
402
445
490
SIZE
NOTE: SEE DRAWING 16034 FOR SIZES 542–660.
CONTACT FACTORY FOR BHD AND OTHER
UBD ORIENTATIONS.
ACCESSORIES REQ'D.
CFM
DISCH.
CERT. BY:
ENG./ARCH.
LOC.
JOB:
MINNEAPOLIS, MINNESOTA
CW – POSITION "Z"
CCW – POSITION "W"
TWIN CITY FAN & BLOWER
"BCE", "BAE", "BC" & "BAF" ARR. 3F, DWDI, CLASS II
NON-ROTATABLE
SIZE
2.437
2.437
2.687
2.687
2.937
3.437
SD
H
THD/UBD
51.50
55.50
62.63
68.00
73.88
80.25
15.81
17.50
19.25
21.25
23.50
25.88
H
DBD
53.50
57.50
62.63
68.00
73.88
80.25
NOTES:
1. "CW" ROTATION, MOTOR POSITION "Z"
SHOWN.
"CCW" ROTATION, MOTOR
POSITION "W" IS SIMILAR BUT OPPOSITE.
2. STANDARD ARR. 3F MOTOR LOCATION ON
LEFT FOR "CW" ROTATION UNITS AND ON
RIGHT FOR "CCW" ROTATION. DIMENSION "FR"
EQUALS MAX. MOTOR FRAME.
3. FOR OPTIONAL FLANGED OUTLET, CONTACT
FACTORY FOR DWG. AC16045.
4. DIMENSION "MF" APPLIES ONLY WHEN SIX (6)
MOUNTING BRACKETS ARE REQUIRED.
5. SEE ES4-98 FOR POINT LOADS AT LOCATION
"S1," "S2," ETC.
K
K
BH
DIA. BASE
HOLES
DIMENSIONS ARE SUBJECT TO CHANGE. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST.
0.31
0.31
0.31
0.31
0.38
0.44
DC
23.75
26.00
28.75
31.56
34.75
38.19
DA
HE
CW
THD
GA. SCROLL
23.00
24.50
27.50
30.00
33.38
37.00
DA
KL
SD
DIA. SHAFT
CW
DBD
Q
DISCH
C
L
HN
DY
P
OUTS.
HSG.
Typical Specifications - SWSI
Fans shall be Type BC Backward Inclined, as manufactured by Twin City Fan & Blower, Minneapolis,
Minnesota.
Performance — Fans shall be tested in accordance with AMCA 210 and AMCA 300 test codes for air moving devices and shall be licensed to bear the AMCA certified ratings seal for both sound and air.
Fans shall have a sharply rising pressure characteristic extending through the operating range and continuing to
rise beyond the efficiency peak to ensure quiet and stable operation. Fans shall have a non-overloading design
with self-limiting horsepower characteristics and shall reach a peak in the normal selection area. All fans shall
be capable of operating over the minimum pressure class limits, as specified in AMCA Standard 99-2408.
Housing — BC fan housings shall be of heavy gauge, continuously welded construction. Housings with lock
seams or partially welded construction are not acceptable. Discharge flanges are to be provided for rigidity
and duct connection. Housings shall be suitably braced to prevent vibration or pulsation. Housings shall have
tapered spun, aerodynamically designed inlet cones or funnels providing stable flow and high rigidity.
Class I and II sizes 270 and smaller shall be of the rotatable design, convertible to 8 standard discharge
configurations.
Wheel — BC backward inclined wheels shall be single thickness plate type, designed for maximum efficiency
and quiet operation, and shall be solid welded to the rim and back plate. Partial welding will not be acceptable
on airfoil or backward inclined blades. All wheels shall be statically and dynamically balanced.
Shaft — Shafts shall be AISI 1040 or 1045 hot rolled steel, accurately turned, ground, polished, and ring
gauged for accuracy. Shafts shall be sized for the first critical speed of at least 1.43 times the maximum
speed.
Bearings — Bearings shall be heavy duty, grease lubricated, spherical roller or adapter mounted anti-friction
ball, self-aligning, pillow block type and selected for a minimum average bearing life (AFBMA L-50) in excess
of 200,000 hours at the maximum fan RPM.
Drive — Motor sheaves shall be cast iron, variable pitch on applications 10 HP and smaller, and fixed pitch
on 15 HP and larger. Drives and belts shall be located external to the fan casing and rated for 150% of the
required motor HP.
Finish and Coating — The entire fan assembly, excluding the shaft, shall be thoroughly degreased and
deburred before application of a rust-preventative primer. After the fan is completely assembled, a finish coat
of paint shall be applied to the entire assembly. The fan shaft shall be coated with a petroleum-based rust
protectant.
Accessories — When specified, accessories such as belt guards, weather covers, access doors, companion
flanges, variable inlet vanes, outlet dampers, piezometer ring airflow measurement device, inlet boxes, shaft
coolers, shaft seals, inlet screens, etc., shall be provided by Twin City Fan & Blower to maintain one source
responsibility.
When specified, fans shall be supplied with internal or nested type variable inlet vanes for wheel diameters
161∕2" and larger. Cantilevered vane blades are to be used through Size 660 to minimize air performance insertion losses and noise. The operating mechanism shall be out of the inlet airstream.
Factory BALANCE AND Run TestING — All fan wheels shall be statically and dynamically balanced in
accordance with ANSI/AMCA 204 “Balance Quality and Vibration Levels for Fans” to Fan Application Category
BV-3. This corresponds to a Balance Quality Grade G6.3. All assembled fans are test run at the rated operating speed or at the maximum RPM of the fan. Vibration readings are recorded in the horizontal, vertical and
axial directions on both bearings. Trim balancing is performed if necessary to maintain BV-3 vibration limits.
Records shall be maintained and a written copy shall be available upon request.
Guarantee — The manufacturer shall guarantee the workmanship and materials for its BC Backward Inclined
fans for at least one (1) year from startup or eighteen (18) months from shipment, whichever occurs first.
54
Twin City Bulletin 300
Typical Specifications - DWDI
Fans shall be Type BC Backward Inclined, as manufactured by Twin City Fan & Blower, Minneapolis,
Minnesota.
Performance — Fans shall be tested in accordance with AMCA 210 test codes for air moving devices and
shall be licensed to bear the AMCA certified ratings seal for air.
Fans shall have a sharply rising pressure characteristic extending through the operating range and continuing to
rise beyond the efficiency peak to ensure quiet and stable operation. Fans shall have a non-overloading design
with self-limiting horsepower characteristics and shall reach a peak in the normal selection area. All fans shall
be capable of operating over the minimum pressure class limits, as specified in AMCA Standard 2408-69.
Housing — BC fan housings shall be of heavy gauge, continuously welded construction. Housings with lock
seams or partially welded construction are not acceptable. Housings shall be suitably braced to prevent vibration or pulsation. Housings shall have spun, aerodynamically designed inlet cones or inlet venturies for smooth
airflow into the wheels.
Wheel — Wheels shall have tapered spun wheel cones or shrouds, providing stable flow and high rigidity.
Wheels shall be of the non-overloading type. BC backward inclined wheels shall be single thickness plate type,
continuously welded to the rim and back plate. Blades shall be designed for maximum efficiency and quiet
operation. Partial welding will not be acceptable on airfoil or backward inclined blades. Smaller sizes may use
extruded aluminum blades. All wheels shall be statically and dynamically balanced. The complete fan assembly
shall be test balanced at the operating speed prior to shipment.
Shaft — Shafts shall be AISI 1040 or 1045 hot rolled steel, accurately turned, ground, polished, and ring
gauged for accuracy. Shafts shall be sized for the first critical speed of at least 1.43 times the maximum
speed.
Bearings — Bearings shall be heavy duty, grease lubricated, spherical roller or adapter mounted anti-friction
ball, self-aligning, pillow block type and selected for a minimum average bearing life (AFBMA L-50) in excess
of 200,000 hours at the maximum fan RPM.
Drive — Motor sheaves shall be cast iron, variable pitch on applications 10 HP and smaller, and fixed pitch
on 15 HP and larger. Drives and belts shall be located external to the fan casing and rated for 150% of the
required motor HP.
Finish and Coating — The entire fan assembly, excluding the shaft, shall be thoroughly degreased and
deburred before application of a rust-preventative primer. After the fan is completely assembled, a finish coat
of paint shall be applied to the entire assembly. The fan shaft shall be coated with a petroleum-based rust
protectant.
Accessories — When specified, accessories such as belt guards, access doors, companion flanges, variable
inlet vanes, outlet dampers, piezometer ring airflow measurement device, inlet boxes, shaft coolers, shaft seals,
inlet screens, etc., shall be provided by Twin City Fan & Blower to maintain one source responsibility.
When specified, fans shall be supplied with internal or nested type variable inlet vanes for wheel diameters 161∕2"
and larger. Cantilevered vane blades are to be used through Size 660 to minimize air performance insertion
losses and noise. The operating mechanism shall be out of the inlet airstream. Double width fans shall have
interconnecting linkage to ensure operation in unison.
Factory BALANCE AND Run TestING — All fan wheels shall be statically and dynamically balanced in
accordance with ANSI/AMCA 204 “Balance Quality and Vibration Levels for Fans” to Fan Application Category
BV-3. This corresponds to a Balance Quality Grade G6.3. All assembled fans are test run at the rated operating speed or at the maximum RPM of the fan. Vibration readings are recorded in the horizontal, vertical and
axial directions on both bearings. Trim balancing is performed if necessary to maintain BV-3 vibration limits.
Records shall be maintained and a written copy shall be available upon request.
Guarantee — The manufacturer shall guarantee the workmanship and materials for its BC Backward Inclined
fans for at least one (1) year from startup or eighteen (18) months from shipment, whichever occurs first.
55
Twin City Bulletin 300
Industrial & Commercial Fans
Centrifugal Fans | Utility Sets | Plenum & Plug Fans | Inline Centrifugal Fans
Mixed Flow Fans | Tubeaxial & Vaneaxial Fans | Propeller Wall Fans | Propeller Roof Ventilators
Centrifugal Roof & Wall Exhausters | Ceiling Ventilators | Gravity Ventilators | Duct Blowers
Radial Bladed Fans | Radial Tip Fans | High Efficiency Industrial Fans | Pressure Blowers
Laboratory Exhaust Fans | Filtered Supply Fans | Mancoolers | Fiberglass Fans | Custom Fans
Twin city fan & blower | www.tcf.com
A Twin City Fan Company
1.5MWG04/11
5959 Trenton Lane N | Minneapolis, MN 55442 | Phone: 763-551-7600 | Fax: 763-551-7601
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