instruction and maintenance manual

INSTRUCTION AND
MAINTENANCE MANUAL
SANITARY POSITIVE DISPLACEMENT PUMPS
SECTION
IOM TRA® 20
PAGE
1 OF 23
ISSUE
H
TRA® 20 SERIES
CONTENTS
Replacement Labels:
Introduction . . . . . . . . . . . . . . . . . . . . . . . .1
General Information . . . . . . . . . . . . . . . . . . . 1
Safety Information . . . . . . . . . . . . . . . . . . . . 2
Tools Required for Disassembly / Assembly . . . . . . .3
Normal Operation . . . . . . . . . . . . . . . . . . . . 3
Installation . . . . . . . . . . . . . . . . . . . . . . . . 6
Startup Checklist . . . . . . . . . . . . . . . . . . . . .8
Cleaning and Maintenance . . . . . . . . . . . . . . . .8
Pump Head and Seal Disassembly / Assembly . . . . 10
Gearbox Disassembly / Assembly . . . . . . . . . . . 11
Standard Clearances . . . . . . . . . . . . . . . . . . 13
Assembly Torque . . . . . . . . . . . . . . . . . . . . 17
Care of Stainless Steel . . . . . . . . . . . . . . . . . 19
Troubleshooting Guide . . . . . . . . . . . . . . . . . 20
ATEX Pump Only Information . . . . . . . . . . . . . 22
Warranty . . . . . . . . . . . . . . . . . . . . . . . . 24
!
WARNING !
The following labels are installed on your
equipment. If these labels are removed or become
unreadable, contact your local distributor and
they will be supplied at no charge.
Application Instructions: Apply to a clean, dry surface.
Remove the backing from the label, place it in proper position,
protect it with a cover sheet and burnish it. (A soft rubber
roller also may be used to press the label into place.) Apply
all labels to be readable from the front of the pump
Important:
INTRODUCTION
1. Pump and drive are factory aligned.
Thank you for purchasing this Wright Flow Technologies
model. To ensure the best possible service, read and
understand this manual prior to installation, operation or
maintaining this pump. For questions regarding installation,
operation or maintenance, contact your distributor or Wright
Flow Technologies.
2. Recheck alignment after installation and before start-up
3. Recheck alignment periodically, to maximize service life.
GENERAL INFORMATION
Each Wright Flow Technologies product is shipped completely
assembled and ready for use. Normal maintenance as
outlined in this manual will provide long, trouble free service
when the pumps is incorporated in a properly designed
system.
Inspection at receipt: ports are covered at the factory to
prevent dirt and foreign objects from entering the pump head.
If port covers are damaged or missing remove the pump
cover to ensure the pump is clean and free of foreign objects
or materials before rotating the shaft. If the pump is damaged
in transit file a claim with the carrier right away. The carrier
has a Bill of Lading showing that the shipment was received
from us in good condition.
Returns: when necessary to return product under warranty
or for any other reason first contact Wright Flow Technologies
to receive a Return Goods Authorization number to facilitate
getting the product back to you as soon as possible.
Information contained in this manual is subject to change without
notice and does not represent a commitment from IDEX Corporation.
Wright Flow Technologies ● A Unit of IDEX Corporation
FIGURE 1
TRA® 20 SERIES
SAFETY INFORMATION
INCORRECT INSTALLATION, OPERATION OR MAINTENANCE OF EQUIPMENT MAY CAUSE SEVERE
PERSONAL INJURY OR DEATH AND/OR EQUIPMENT DAMAGE AND MAY INVALIDATE THE WARRANTY.
This information must be read fully before beginning installation, operation or maintenance and must be
kept with the pump. All installation and maintenance must be undertaken by suitably trained or qualified
persons only.
Symbol
Legend :
!
!
Danger - Failure to follow the listed
precautionary measures identified by
this symbol may result in serious injury
or death.
DO NOT OPERATE PUMP IF:
– The front cover is not installed correctly.
!
DO NOT place fingers, etc. into the pumping chamber
or its connection ports or into any part of the drive train
if there is ANY possibility of the pump shafts being
rotated. Severe injury will occur.
!
DO NOT exceed the pumps rated pressure, speed, and
temperature, or change the system/duty parameters
from those for which the pump was originally supplied,
without confirming its suitability for the new duty.
WARNING
!
!
WARNING
INSTALLATION AND OPERATION OF THE PUMP
MUST ALWAYS COMPLY WITH HEALTH AND
SAFETY REGULATIONS.
A device must be incorporated into the pump, system,
or drive to prevent the pump exceeding its stated duty
pressure. It must be suitable for both directions of
pump rotation where applicable. Do not allow pump
to operate with a closed/blocked discharge unless a
pressure relief device is incorporated. If an integral
relief valve is incorporated into the pump, do not allow
re-circulation through the relief valve for extended
periods.
The mounting of the pump or pump unit should be
solid and stable. Pump orientation must be considered
in relation to drainage requirements. Once mounted,
shaft drive elements must be checked for correct
alignment. Rotate pump shaft by at least one full
revolution to ensure smoothness of operation.
Incorrect alignment will produce excessive loadings
and will create high temperatures and increased noise
emissions.
The installation must allow safe routine maintenance
and inspection (to check for leakage, monitor
pressures, etc) and provide adequate ventilation
necessary to prevent overheating.
Before operating the pump, be sure that it and all
parts of the system to which it is connected are clean
and free from debris and that all valves in the suction
and discharge pipelines are fully opened. Ensure that
all piping connecting to the pump is fully supported
and correctly aligned with its relevant connections.
Misalignment and/or excess loads will cause severe
pump damage.
Be sure that pump rotation is correct for the desired
direction of flow.
WARNING
WARNING
– Any guards are missing or incorrectly installed.
– The suction or discharge piping is not connected.
!
WARNING
DO NOT INSTALL THE PUMP INTO A SYSTEM
WHERE IT WILL RUN DRY (I.E. WITHOUT A
SUPPLY OF PUMPED MEDIA).
SECTION IOM TRA®20
ISSUE
H
PAGE 2 OF 23
!
!
Warning - Safety instructions which
shall be considered for reasons of safe
operation of the pump or pump unit and/
or protection of the pump or pump unit
itself are marked by this symbol.
Pressure gauges/sensors are recommended, next
to the pump suction and discharge connections to
monitor pressures.
Caution must be taken when lifting the pump. Suitable
lifting devices should be used as appropriate. Lifting
eyes installed on the pump must only be used to lift
the pump, not pump with drive and/or baseplate. If
pump is baseplate mounted, the base plate must
be used for all lifting purposes. If slings are used for
lifting, they must be safely and securely attached. For
weights of bare shaft pumps refer to catalog.
DO NOT attempt any maintenance or disassembly of
the pump or pump unit without first ensuring that :
– The pump is fully isolated from the power source
(electric, hydraulic, pneumatic).
– The pumping chamber, relief valve and any shaft
seal support system are depressurized and purged.
– Any temperature control devices (jackets, heattracing, etc) are fully isolated, that they are
depressurized and purged, and components are
allowed to reach a safe handling temperature.
!
!
!
!
WARNING
DO NOT attempt to dismantle a pressure relief valve
which has not had the spring pressure relieved or is
mounted on a pump that is operating. Serious personal
injury or death and/or pump damage may occur.
DO NOT loosen or undo the front cover, any
connections to the pump, shaft seal housings,
temperature control devices, or other components,
until sure that such action will not allow the unsafe
escape of any pressurized media.
Pumps and/or drives can produce sound power levels
exceeding 85 dB(A) under certain operating conditions.
When necessary, personal protection against noise
must be taken.
Avoid any contact with hot parts of pumps and/or
drives which may cause injury. Certain operating
conditions, temperature control devices (jackets, heattracing, etc.), bad installation, or poor maintenance
can all promote high temperatures on pumps and/or
drives.
When cleaning, either manually or by CIP method,
the operator must ensure that a suitable procedure
is used in accordance with the system requirements.
During a CIP cleaning cycle, a pump differential
pressure of between 30 and 45 psi is recommended to
ensure suitable velocities are reached within the pump
head. The exterior of the pump should be cleaned
periodically.
TOOLS REQUIRED FOR
DISASSEMBLY / ASSEMBLY
1.
2.
3.
4.
5.
6.
7.
8.
“O” ring removal tool - supplied with pump
Soft-faced hammer
Suitable gear puller
Allen wrenches
Hydraulic press
Suitable V blocks
Torque wrench
Measuring tools
9. Spanner wrenches for gear end lock nuts - available
from Wright Flow Technologies
•WT0150SPWRENCH
•WT0300SPWRENCH
•WT0600SPWRENCH
•WT2200SPWRENCH
NORMAL OPERATION
Normal operation of most Wright Flow TRA20 Series Pumps
is within a range of 0 to 600 rpm, and a pressure range of 0 to
450 psi. Standard rotors operate within a temperature range
of –40°F to 200°F. Hot clearance rotors operate at 200°F to
300°F. Consult factory for operation at other values. Refer to
Table 1.
Pump Characteristics:
Wright Flow Technologies TRA20 pumps are positivedisplacement, low-slip, stainless steel pumps designed with
larger diameter shafts for greater strength and stiffness,
mounted on a heavy-duty cast iron bearing frame (stainless
steel option available) with double tapered roller bearings.
● Up to 200 psi (13.8 bar) pressure capability.
● No bearings in the product zone.
● Heavy-duty bearing frame with large diameter shafts.
FIGURE 2
TRA20 Range Operating Parameters:
The maximum pressure and speed operating parameters
are given in Pump Performance Tables 2 & 2A. In practice
these may be limited due to the nature of the product to be
pumped and/or design of the system in which the pump is
to be installed. Consult Wright Flow Technologies or your
Wright Flow Technologies distributor for assistance.
The operating temperature limit of the pump is determined by
the rotor clearance.
For the circumferential piston pumps (CPP):
● TRA20 Series - four rotor clearance bands:
a) Standard
c) Hot
b) FF (Front Face)
d) Extra (Hot Chocolate)
The pump should not be subjected to sudden temperature
changes to avoid the risk of damage from sudden expansion/
contraction of components. Care should be taken when
selecting pumps for handling liquids containing abrasive
particles as these may cause wear of pump head components.
TRA20 Series
Circumferential
Piston
GENERAL
TRA20 Pumping Principal:
The pumping action is generated by the contra-rotation of two
pumping elements (rotors) within a chamber (rotorcase) - see
Figure 2. The rotors are located on shafts, which in turn are
mounted within an external gearbox and supported by the
bearings; the timing gears are also located on the shafts. The
timing gears transfer the energy from the drive shaft to the
driven shaft, synchronising the rotors such that they rotate
without contact with each other.
As the rotors pass the suction port, see Figure 2, the cavity
generated increases creating a pressure decrease, which
induces the pumped medium to flow into the rotorcase.
The pumped medium is carried around the rotorcase by the
rotors to the discharge side of the pump, here the cavity
decreases and the pumped medium is discharged from the
rotorcase.
Standard
FF
Hot
Extra
93°C
(200°F)
105°C
(221°F)
150°C
(302°F)
See
Note
NOTE: "Extra" clearance rotors are another available option from Wright
Flow Technologies. “Extra” clearance rotors are recommended for use
with products such as peanut butter or chocolate. These products tend
to ""plate out"" and build up on rotor surfaces. Extra clearance rotors
require special selection procedures. Contact Wright Flow Technologies
Application Engineering for assistance.
●Greased lubed bearings for positive lubrication to all
bearings over entire speed, temperature and pressure
range.
●Non-galling ASTM A-494 rotors are standard; permits
running at tighter clearances and pumping a wide range of
viscosities.
Liquid Operating Temperature Limit °C (°F)
TABLE 1
!
WARNING !
The Net Positive Suction Head available
(NPSHa) from the system must always
exceed the Net Positive Suction Head
required (NPSHr) by the pump.
Observing the following general guidelines should ensure the
best possible suction condition is created.
●Suction piping is at least the same diameter as the pump
connections.
●The length of suction piping is kept to the absolute
minimum.
●The minimum number of bends, tees and pipework
restrictions are used.
●Calculations to determine system NPSHa are carried out
for the worst condition, see below.
Should advice on pump or system NPSH characteristics be
required contact the factory or their authorised distributor.
SECTION IOM TRA®20
ISSUE
H
PAGE 3 OF 23
For Suction Lift
Or Vacuum
Conditions.
INSTALLATION POSITIONS
For Conditions
With Positive
Suction Head.
4-Way Mounting
Suction
Head
Atmospheric
Pressure
NPSH
Available
Horizontal ports,
bottom shaft position
10.0 Meters (32.8 F eet) Water C olumn
NPSH
Available
Suction Lift
Or Vacuum
Suction Line
Friction Loss
Suction Line
Friction Loss
Vertical ports, left-hand
or right-hand shaft position
(required for CIP design)
Vapour
Pressure
Vapour
Pressure
Horizontal ports,
top shaft position
The mounting foot may be moved to any of four positions
to allow horizontal or vertical porting and flexibility of driver
connection.
Atmospheric
Vacuum
TRA®20 PUMP PERFORMANCE
TRA®20
Model
Nominal
Capacity
GPM M³/hr
Displacement
per Revolution
Maximum
Pressure
Gal.
PSI
Liter
Liquid
Temperature Range
Bar
Deg. F
Viscosity
Range
Deg. C
SSU
Standard
Ports
cSt
in.
mm
Optional Maximum
Ports
Speed
in. mm (RPM)
0060
8
1.8
.008
.030
300
21
-40° to 300° *
-40° to 150° *
28 to 910,000
1 to 200,000
1.0
25.4
1.5
38
0150
11
2.5
.014
.052
250
17
-40° to 300° *
-40° to 150° *
28 to 910,000
1 to 200,000
1.5
38.0
—
—
1000
800
0180
20
4.5
.029
.108
200
14
-40° to 300° *
-40° to 150° *
28 to 910,000
1 to 200,000
1.5
38.0
2.0
51
700
0300
36
8.2
.060
.227
250
17
-40° to 300° *
-40° to 150° *
28 to 910,000
1 to 200,000
1.5
38.0
2.0
51
600
0450
58
13.2
.096
.366
450
31
-40° to 300° *
-40° to 150° *
28 to 910,000
1 to 200,000
2.0
51.0
—
—
600
0600
90
20.4
.150
.568
300
21
-40° to 300° *
-40° to 150° *
28 to 910,000
1 to 200,000
2.5
64.0
3.0
76
600
1300
150
34.1
.250
.946
200
14
-40° to 300° *
-40° to 150° *
28 to 910,000
1 to 200,000
3.0
76.0
—
—
600
1800
230
52.2
.383
1.45
450
31
-40° to 300° *
-40° to 150° *
28 to 910,000
1 to 200,000
3.0
76.0
—
—
600
2100
300
68.1
.500
1.89
500
34
-40° to 300° *
-40° to 150° *
28 to 910,000
1 to 200,000
4.0
102.0
—
—
600
2200
310
70.4
.516
1.95
300
21
-40° to 300° *
-40° to 150° *
28 to 910,000
1 to 200,000
4.0
102.0
—
—
600
2200
310
70.4
.516
1.95
300
21
-40° to 300° *
-40° to 150° *
28 to 910,000
1 to 200,000
4.0
102.0
—
—
600
3200
450
102.2
0.753
2.85
300
21
-40° to 300° *
-40° to 150° *
28 to 910,000
1 to 200,000
6.0
152.4
—
—
600
* Hot clearances required for high temperature operation.
TABLE 2 - PUMP PERFORMANCE PARAMETERS
TRA®20
Rectangular
Flange Model
Nominal
Capacity
GPM
Displacement per
Revolution
M³/hr
Gal.
Liter
Maximum
Pressure
PSI
Bar
Liquid Temperature
Range
Deg. F
Deg. C
Inlet (W x L)
in.
mm
Outlet
in.
mm
Maximum
Speed
(RPM)
0240
11.6
2.5
.03
.11
200
14
-40° to 300°
-40° to 150°
1.31 x 4.63
33.27 x 125.22
1.5
38.1
400
0340
24.0
5.4
.06
.23
200
14
-40° to 300°
-40° to 150°
1.75 x 6.75
44.50 x 171.45
1.5
38.1
400
0640
60.0
13.6
.15
.57
200
14
-40° to 300°
-40° to 150°
2.24 x 8.82
56.90 x 224.03
2.5
57.15
400
1340
100.0
22.7
.25
.95
200
14
-40° to 300°
-40° to 150°
2.97 x 9.25
75.44 x 234.95
3.0
76.2
400
2240
200.0
45.4
.52
1.95
200
14
-40° to 300°
-40° to 150°
3.87 x 11.00
98.30 x 279.40
4.0
101.6
400
TABLE 2A - PUMP PERFORMANCE PARAMETERS - RECTANGULAR FLANGE MODELS
SECTION IOM TRA®20
ISSUE
H
PAGE 4 OF 23
PORT CONFIGURATIONS
PERFORMANCE RANGE
● Capacity Range:
0.1 to 310 gpm (0.02 to 70.4 m3/hr)
● Pressure Range:
to 500 PSI/34 Bar
● Liquid Temperature Range:
-40°F to +300°F (-40°C to +150°C)
Note: Hot clearances required for high temp operation
● Viscosity Range:
28 to 910,000 SSU (1 to 200,000 cSt)
Note: Consult factory for applications greater than 910,000
SSU/200,000 cSt. Chocolate clearances available.
Standard Sanitary Clamp (Triclamp)
Other port configuration options include:
● DIN 11851
●RJT
●NPT
●SMS
● 150# or 300# flange
●ACME
TRA®20 DIMENSIONS
S
D
K
R
J
M
Q
OPTIONAL
FOOT LOCATION
O
E
N
2F
L
A
Model
0060
0150
0180
0300
0450
0600
1300
1800
2100
2200
3200
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
A
4.75
121
4.75
121
4.75
121
6.25
159
8.25
210
8.25
210
8.25
210
8.50
216
12.00
305
8.50
216
12.00
304.8
B
1.95
50
1.95
50
2.18
55
2.78
71
3.86
98
4.14
105
4.78
121
3.45
88
3.45
88
3.69
94
3.73
94.7
C
3.75
95
3.75
95
3.75
95
4.25
108
5.87
149
5.87
149
5.87
149
9.00
229
11.63
295
9.00
229
11.63
295.4
C
P
D
11.71
297
11.71
297
12.37
314
14.49
368
18.59
472
19.14
486
20.15
512
23.26
591
27.08
688
24.00
610
27.70
703.6
E
5.50
140
5.50
140
5.50
140
6.86
174
9.56
243
9.56
243
9.56
243
12.38
314
13.88
353
12.38
314
13.87
352.3
F
G
1.94 2.31
49 59
1.94 2.31
49 59
1.94 2.31
49 59
2.31 2.56
59 65
3.50 4.12
89 105
3.50 4.12
89 105
3.50 4.12
89 105
3.75 7.25
95 184
5.25 8.00
133 203
3.75 7.25
95 184
5.25 8.00
133.4 203.2
H
0.375 x 0.31 (slot)
9.5 x 8 (slot)
0.375 x 0.31 (slot)
9.5 x 8 (slot)
0.375 x 0.31 (slot)
9.5 x 8 (slot)
0.438 x 0.44 (slot)
11 x 11 (slot)
0.56 x 0.50 (slot)
14 x 13 (slot)
0.56 x 0.50 (slot)
14 x 13 (slot)
0.56 x 0.50 (slot)
14 x 13 (slot)
0.56 x 0.50 (slot)
14 x 13 (slot)
0.66 Ø
16 Ø
0.56 x 0.19 (slot)
14 x 5 (slot)
0.69
17.5
I
6.82
173
6.82
173
6.82
173
7.77
197
10.13
257
10.13
257
10.12
257
14.05
357
16.54
420
14.05
357
16.48
418.6
UPPER OR LOWER DRIVE
LOCATIONS
G
B
H
J
J
2.93
74
2.93
74
2.93
74
3.56
90
5.06
129
5.06
129
5.06
129
6.38
162
6.88
175
6.38
162
6.87
174.5
I
K
9.61
244
9.61
244
9.84
250
11.61
295
14.86
377
15.14
385
15.77
401
17.75
450
21.24
539
18.49
470
21.68
550.7
L
M
2.12 2.00
54 51
2.12 2.00
54 51
2.12 2.00
54 51
2.62 2.32
67 59
3.50 2.25
89 57
3.50 2.25
89 57
3.50 2.25
89 57
4.50 2.75
114 70
5.06 4.06
129 103
4.50 2.75
114 70
5.06 3.95
128.5 100.3
N
4.21
107
4.21
107
4.21
107
5.21
132
7.31
186
7.31
186
7.31
186
9.38
238
10.38
264
9.38
238
10.37
263.4
O
P
1.50 2.79
38 71
1.50 2.79
38 71
1.50 3.02
38 77
1.50 3.84
38 98
2.00 4.73
51 120
2.50 5.01
63 127
3.00 5.65
76 144
3.00 4.20
76 107
4.00 4.70
102 119
4.00 4.44
102 113
6.00 5.20
152.4 132.1
SECTION IOM TRA®20
QØ
0.875
22.23
0.875
22.23
0.875
22.23
1.250
31.75
1.625
41.28
1.625
41.28
1.625
41.28
2.000
50.8
2.375
60.33
2.000
50.80
2.38
60.3
ISSUE
H
R
3.49
89
3.49
89
3.49
89
4.25
108
5.37
136
5.37
136
5.37
136
6.53
166
7.37
187
6.63
168
9.18
233.2
S
6.97
177
6.97
177
6.97
177
8.50
216
10.75
273
10.75
273
10.75
273
13.06
332
14.73
374
13.25
337
18.36
466.3
Weight
53 lb.
24 kg
53 lb.
24 kg
53 lb.
24 kg
99 lb.
45 kg
290 lb.
132 kg
290 lb.
132 kg
312 lb.
142 kg
528 lb.
238kg
870 lb.
395 kg.
555 lb.
252 kg
890 lb.
404 kg.
PAGE 5 OF 23
EQUIPMENT SERIAL NUMBER
All Wright Flow Technologies pumps are identified by
a serial number on the gear case nameplate, which is
stamped on the pump body and cover.
!
CAUTION !
The gear case, body, and cover must be kept
together as a unit due to backface, rotor, and
cover clearances. Failure to do so will damage
the pump.
INSTALLATION
Consideration must be given to the following in order to
achieve proper installation
1. Pumps of this type are usually mounted on a base plate
common with the drive unit. Bases may be permanently
mounted, be self-leveling and with vibration isolation
pads, have adjustable legs or be portable. Bases should
be level during pump operation.
2. Provide power as required by the motor and controls as
needed for system operation.
WARNING !
Electrical connections must be made by a
registered electrician in accordance with local
codes and standards.
↯
4. Welding of fittings is not recommended since warpage
can occur which may affect pump operation and
performance.
5. Overpressure protection must be provided for this pump.
A pump mounted pressure relief valve, a torque limiting
device on the drive or a rupture disc in the discharge
piping are examples. If pump rotation is to be reversed,
pressure protection must be provided on both sides of
the pump.
!
Installation should follow good practice to provide the
best performance and installation must meet local code
requirements. All system components must be correctly
sized to provide satisfactory operation of your Wright Flow
Technologies product.
↯
frequent starts and stops. With low absolute inlet pressure
a check on the outlet side of the pump prevents backflow
and minimizes start-up differential pressure.
WARNING !
WARNING !
Do not operate pump unless over-pressure
protection is installed in discharge piping.
6. Inlet side strainers or traps can be used to prevent
foreign objects from entering and damaging the pump.
Selection should be made based on viscosity to prevent
clogging and restricting the inlet thus causing cavitation
and reduction of flow from the pump.
7. Installation of pressure and/or vacuum gauges at inlet
and/or outlet provide a convenient way to assess pump
operation. Such gauges can indicate if pressure is normal
or not, show changes in pump or system conditions, and
provide indications of flow and changes in viscosity.
8. Pumps and drives ordered from the factory on a common
base plate have been supplied with a flexible coupling
and aligned before shipping. This alignment should
be rechecked after the pump is installed and piping is
complete.
Using feeler gages check angular alignment in four places
around the coupling. The alignment and space between
the couplings should be set to the manufacturer’s
recommended distance. Shim as needed. Refer to
Figure 3.
To avoid serious injury or death, do not install
or service pump unless power is off and
locked out.
ATTENTION
CAUTION !
Operation of the pump with inlet and/or outlet
valves in the closed position can cause
damage to the pump.
3. Piping should be supported independently of the pump
to prevent mis-alignment of pump parts that will cause
excessive wear to rotors, bearings and shafts. Use of
thermal expansion (flexible) joints will also minimize
forces exerted on the pump. Inlet and outlet valves permit
servicing of the pump without emptying the entire system.
Inlet piping must not slope toward the pump in such a way
as to cause formation of an air pocket ahead of the pump.
An inlet valve will serve to keep the inlet line full. This is
particularly important with low viscosity fluids and with
SECTION IOM TRA®20
ISSUE
H
PAGE 6 OF 23
FIGURE 3
Using a straight edge check parallel alignment as shown
in Figure 4. Shim height as needed.
FIGURE 4
9. Turn shaft manually to make sure that the pump turns
freely.
!
WARNING !
Do not put fingers in ports or near rotating
members.
10. Jog motor and observe motor coupling to make sure
pump will turn in the right direction. Refer to Figure 5.
13. Make sure inlet and outlet connections are tightened.
If pump has double seals connect seal flushing piping.
These connections are 1/8” NPT pipe threads standard,
BSP optional. Liquid used for flushing is thereby
connected to one of the seals and discharged to drain
on the opposite side. Flow should be about 1/4 GPM, but
may be increased for high temperature applications, but
should be kept as near to 1/4 GPM as possible to avoid
seal damage. Flush pressure must be kept at or below
14.5 PSI (1 bar).
14. Lubrication (Refer to Tables 3 and 4)
Gears are lubricated with oil conforming to ISO 460, SAE
140, AGMA grade 7 or FDA 21 CFR 178.3570 for top or
bottom shaft mounting position and oil is added at the factory.
Oil Amount (gears)
Top Shaft Drive
Bottom Shaft Drive
FIGURE 5
!
WARNING !
Stay clear of motor shaft and coupling
when jogging motor.
11. Lock out power to pump.
!
WARNING !
To avoid serious injury or death, do not
install or service pump unless power is off
and locked out.
Grease Amount (per bearing)
Model
Top/Bottom
Mount
Side Mount
Front
Rear
0060, 0150,
0180
1.3 oz
(40 mL)
3.3 oz
(100 mL)
0.37 oz
(11 cc)
0.13 oz
(4 cc)
0300
2.0 oz
(60 mL)
4.0 oz
(120 mL)
0.60 oz
(18 cc)
0.21 oz
(6 cc)
0450, 0600,
1300
6.0 oz
(170 mL)
9.5 oz
(280 mL)
0.84 oz
(25 cc)
0.76 oz
(22 cc)
1800, 2200
11.0 oz
(320 mL)
20.0 oz
(600 mL)
1.33 oz
(39 cc)
1.03 oz
(30 cc)
2100, 3200
17.0 oz
(500 mL)
44.0 oz
(1300 mL)
1.96 oz
(58 cc)
1.16 oz
(34 cc)
TABLE 3 - LUBRICATING OIL AND GREASE AMOUNT
Governing
Standard
Suggested
Brand Names
Lubricating Oil
Grease
Conforming to ISO 460 or
SAE 140 or AGMA grade 7,
and FDA 21 CFR 178.3570.
Conforming to ISO 220
or NLGI grade 2,
and NSF USDA-H1
Chevron Lubricating Oil
FM ISO 460
Chevron FM Grease
ALC 2 EP
or equivalent to
Governing Standard
or equivalent to
Governing Standard
TABLE 4 - SUGGESTED LUBRICATING OIL
AND GREASE BRAND
Bearings are greased with grease conforming to ISO 220,
NLGI grade 2 or NSF USDA-H1. Grease bearings after
every 250 hours of operation; change oil every 500 hours.
Where moisture and/or condensation are heavy change oil
and grease more frequently. If temperature is 5°F or below,
bearings should be greased with silicon grease.
12. Connect coupling halves and install coupling guard.
!
WARNING !
Do not operate pump without guards in
place.
!
WARNING !
Do not put fingers in ports or near rotating
members.
FIGURE 6
SECTION IOM TRA®20
ISSUE
H
PAGE 7 OF 23
STARTUP CHECKLIST
Has protection from high pressure been considered?
See Installation step 5.
Are pump and all piping clean and free of foreign
material, gaskets, weld slag, bolts etc.?
DO NOT USE PUMP TO CLEAN SYSTEM.
Are connections tightened and leak free?
Is gear drive properly lubricated? See Installation step 14.
Are all guards in place and secure?
Have seals requiring flushing been supplied with an
adequate supply of clean flushing fluid?
Are all valves open on the discharge side of the pump?
Are all valves open on the inlet side of the pump, and is
the material to be pumped reaching the pump?
Is direction of rotation correct? See Installation step 10.
Jog or start pump at low speed when possible.
Check to see that pump is performing properly within several
minutes. If problems are detected, see Troubleshooting
Guide.
CLEANING AND WET-END
MAINTENANCE
Wright Flow Technologies products are designed for easy
removal of the cover, rotors and seals for cleaning when
necessary. See instructions under Pump Head and Seal
Disassembly/Assembly.
!
WARNING !
To avoid serious injury or death, do not
install or service pump unless power is off
and locked out.
!
WARNING !
Relieve system pressure before removing
cover or port connections.
ATTENTION
CAUTION !
Handle all parts with care to avoid nicks
and scratches which may affect pump
operation.
Cleaning
Clean per established procedures. Be aware of the cleaning
solution used (see MSDS), and of cleaning solution
temperature. Make sure no residual cleaning solution stays
in the pump.
Note that acidic cleaners have a high metal corrosion rate, so
pump parts should be exposed to these cleaners no longer
than necessary and be completely rinsed.
SECTION IOM TRA®20
ISSUE
H
PAGE 8 OF 23
CIP:
The TRA20 pump range has optional features to allow the
pump to be effectively cleaned by the CIP procedures
recommended for in place cleaning of process plants. Flat
body profile allows complete draining of the side-mounted
pump and provides the CIP solution access to the entire cover
o-ring groove. CIP holes in the rotor hubs provide additional
CIP solution access to the cover hub/shaft seal areas for
difficult cleaning applications
It is recommended that a differential pressure of 2 to 3 Bar (30
to 45 psi) be developed across the pump head during cleaning
in order to develop the necessary fluid velocities required for
thorough cleaning. To assist in maximizing the effectiveness
of cleaning within the pump head, it is recommended that
during the cleaning cycle a flow rate equivalent to a velocity of
1.5 meters per second in a pipe of equal diameter to the rotor
case connections is achieved.
Rotor Retainer Seal Replacement Interval:
It is recommended that the Rotor Retainer o-ring seal be
replaced every 12 months. O-rings can be obtained by Wright
Flow Technologies as a service part. Please contact your
sales representative for details and provide the pump serial
number.
Rotor Retainer Seal Inspection:
Periodically inspect the Rotor Retainer o-ring seal for any
discoloration, nicks, or cracks. If any of the defects above
are noticed, the o-ring seal must be replaced. Inspection and
replacement refer to the seal replacement procedure below.
Rotor Retainer Seal Replacement Procedure:
1. Remove rotor case cover
2. Remove rotor retainers and ensure components are dry
before servicing.
3.With a penlight, inspect shaft blind tapped hole for
contamination. If soiled, refer to cleaning procedure below
4. If applicable inspect socket head cap screw heads and
rotor retainer plate for contamination. If soiled refer to
cleaning procedure below.
5. Remove and discard rotor retainer o-ring seal/s.
6. Install the Belleville washer (41) into the rotor nut, with the
cone of the washer pointing toward the nut.
7. Install the retainer o-ring (40) into the rotor nut, to retain
the washer.
8. Install the new rotor nut o-rings (39) onto the rotor nut.
Screw the rotor nuts onto the shafts, and use a torque
wrench to tighten to specified setting in Table 8 of this
manual.
9. Install the rotor case cover and use a torque wrench to
tighten cover nuts to torque setting specified in this manual.
Cleaning Procedure for Circumferential Rotor
Screw Tapped Hole:
1. Remove rotor retainer devices from the shaft.
2. Submerge and soak retainer part/s for 5 minutes in clean
out of place (COP) tank with 2% caustic solution.
3.While wearing the appropriate personal protective
equipment (PPE) scrub the part/s vigorously with a
sanitary bristle brush for two minutes while submerged.
4. Procure a clean sanitary pipe brush of a size that engages
the threaded hole with enough interference to remove
contaminants. While wearing the appropriate PPE. Scrub
the shaft hole with internal thread vigorously by plunging
the sanitary pipe brush in and out of the hole for two
minutes while consistently flushing the hole with a 2%
caustic solution using a spray bottle.
5. Soak all above parts in acid sanitizer for 5 minutes, and
then scrub again.
6. Flush shaft threaded hole with acid sanitizer for 5 minutes
using spray bottle, and then scrub the hole again with the
pipe brush for two minutes.
7. Rinse well with clean water and blow-dry blind tapped hole
with clean air.
8. Swab test the inside of the tapped hole to determine
cleanliness.
9. Should the swab test fail, repeat steps 2 thru 8 above until
swab test is passed.
Preventive Maintenance
Refer to Pump Head and Seal Disassembly/Assembly
step 4 for rotor installation. When pump is assembled, there
must be equal clearance as shown in Figure 7.
Follow lubrication intervals as shown in Tables 3 and 4.
FIGURE 7
Annual Maintenance
Conduct the same checks as above, and in addition do the
following:
1. Check bearings for radial play using a dial indicator as
shown. If indicator reading is equal or greater than the
rotor-to-body clearance in Table 7 under Standard
Clearances, replace bearings. Refer to Figure 8.
Simple inspection during cleaning will often detect signs of a
problem before it becomes serious so that it can be corrected
at minimal cost and down-time.
Remove rotors as described in step 1 of Pump Head and
Seal Disassembly/Assembly. Visually inspect rotor wing
tips for signs of metal-to-metal contact. If present the pump
should be repaired or replaced.
Possible causes:
Worn shaft keyway — replace shaft.
Worn rotor keyway — replace rotor (usually both parts
wear, often due to running a loose rotor).
Loose or worn gears, key, keyway shaft — inspect and
replace as needed.
FIGURE 8
2. Drain oil, remove gear box cover and inspect gears for
wear, backlash, and looseness. Retighten as needed.
3. Carefully inspect rotors visually for worn splines, bearing
shoulder wear, and for stress cracks. Replace worn or
cracked rotors. Refer to Figure 9.
4. Refer to Table 7 under Standard Clearances and check
radial and back face clearance to determine wear.
Visually inspect the rotor hub where it contacts the shoulder
on the shaft for wear.
Possible cause:
Running loose rotor — replace rotor and correctly tighten
or re-shim shaft to maintain back-face clearance.
FIGURE 9
Inspect shoulder on shaft for wear.
Possible cause:
Running loose rotor — replace or re-shim shaft.
Check gear backlash. There should be no free movement of
either shaft.
Possible causes:
Worn gear teeth — replace gear
Gear loose on shaft — remove gear, inspect key, keyways
and shaft. Replace worn parts and retighten.
Check condition of bearings. Hand load (about 30 lbs.) each
shaft. There should be no detectable movement.
Cause of movement:
Bearings worn due to lack of lubrication or overload
— replace bearings and ensure adequate lubrication,
reduce hydraulic load.
If gear box disassembly is required see instructions under
Pump Head and Seal Disassembly/Assembly.
See instructions under Pump Head and Seal Assembly and
Disassembly below for disassembly and assembly. When
replacing bearings or shafts in the field care must be taken
to properly shim the shaft to provide the correct clearances
between the rotors, body and cover.
Operating speed adjustment can compensate for wear
in some applications. When performance is no longer
acceptable you may take advantage of the Wright Flow
Technologies remanufacturing plan, as follows.
REMANUFACTURING PROGRAM:
Wright Flow TRA20 pumps may be remanufactured up to
three times depending on use and wear. Remanufactured
pumps are backed with the same warranty as a new
pump. Factory remanufacturing involves body and cover
remachining, new rotors, and replacement of all worn parts
such as shafts, bearings, gears etc.
SECTION IOM TRA®20
ISSUE
H
PAGE 9 OF 23
To facilitate the remanufacturing process contact the factory
to discuss the particular pump(s) to be remanufactured and
obtain return goods authorization. It may be possible to
supply a remanufactured pump in advance of returning a
pump to the factory although not all sizes may be available
at any one time. Be sure to clean and flush pump before
returning it to the factory.
PUMP HEAD AND SEAL
ASSEMBLY AND DISASSEMBLY
Before disassembly, lock out power and release pressure
from pump.
!
2. SEAL DISASSEMBLY
Single Mechanical Seal (See Figure 11)
Inner seal:
Remove seal from body. If chipped, scratched or evidence
of cracks, discard seal. Make sure shoulder is clean;
remove burrs if present; remove and discard “O” rings.
Seal seat:
Remove seal seat from shaft. If chipped, scratched or
evidence of cracks, discard seal. Remove and discard
“O” rings.
WARNING !
To avoid serious injury or death, do not
install or service pump unless power is off
and locked out.
!
WARNING !
Relieve system pressure before removing
cover or port connections.
ATTENTION
FIGURE 12
DOUBLE MECH. SEAL
Inner seal:
Remove seal from body. If chipped, scratched or
evidence of cracks, discard seal. Remove wave spring.
Remove and discard “O” rings.
CAUTION !
Handle all parts with care to avoid nicks
and scratches which may affect pump
operation.
1. PUMP HEAD DISASSEMBLY
Remove cover nuts and cover. If necessary, tap cover
with soft hammer to loosen. Remove and discard cover
“O” ring.
Insert a plastic or other soft dowel to block rotor against
pump body when loosening rotor nuts. Loosen and
remove nuts. Remove rotor nut “O” rings, Belleville
washers and retaining “O” rings. Discard “O” rings.
Orient rotors perpendicular to each
other, then remove rotor with both
wings exposed first. If necessary, use
gear puller or hardwood lever to remove
rotor from shaft. Remove and discard
rotor hub “O” rings. Refer to Figure 10.
Remove body by pulling it straight off
studs. Note that the pump body must
be assembled to the same bearing
housing from which it was removed.
Double Mechanical Seal (See Figure 12)
Seal seat:
Remove seal seat from shaft. If chipped, scratched or
evidence of cracks, discard seal. Make sure shoulder is
clean; remove burrs if present; remove and discard “O”
rings.
Outer seal:
Remove seal from body. If chipped, scratched or
evidence of cracks, discard seal. Remove wave spring.
Remove and discard “O” rings.
3. SEAL ASSEMBLY
Prior to reassembling the pump head, inspect all parts to
make sure they are free from damage. Nicks, scratches
and cracks in mechanical seal components may cause
seal leakage. Nicks, scratches and burrs on any pump
part may cause leakage or performance problems.
Refer to sketches with disassembly instructions.
Single Mechanical Seal (See Figure 11)
Seal seat:
FIGURE 10
Apply a suitable “O” ring lubricant to new “O” rings and
insert them into shaft grooves.
Install seal seats, lining up the parallel flat surfaces on
rear face with the shaft parallel surfaces.
Inner seal:
FIGURE 11
SINGLE MECH. SEAL
Assemble wave spring on seal and install into body in
alignment with seal pins.
Apply a suitable “O” ring lubricant to new “O” rings and
insert them into the inner seal “O” ring grooves.
Lubricate seal faces.
SECTION IOM TRA®20
ISSUE
H
PAGE 10 OF 23
Double Mechanical Seals (See Figure 12)
Seal seat:
Apply a suitable “O” ring lubricant to new “O” ring and
insert into shaft groove furthest from spline.
Install seal seat lining up the parallel flat surfaces with
the shaft parallel surfaces.
FIGURE 13
BELLEVILLE WASHER
Inner seal:
Apply a suitable “O” ring lubricant to new “O” ring and
insert into body groove.
Assemble wave spring on seal and install into body with
notches engaging pins in body.
Outer seal:
Apply a suitable “O” ring lubricant to new “O” rings and
install on outer diameter of seal.
Insert seal assembly into body engaging notches with
pins and pushing from opposite side, over and in, to seat
“O” ring.
Assemble wave spring on seal.
Apply lubricant to seal faces.
Seal Flush Installation (See Figure 13)
Flush holes, threaded for 1/8 NPT, are required on the
TRA20 pump for a double o-ring or mechanical seal.
Flush media enters the bottom side of the pump and
discharges from the top side. Check to ensure flush
water is flowing out of the discharge line, before running
the pump. Most applications require only a low pressure
flush, at a flow rate of approximately 0.25 US GPM.
Apply a suitable lubricant to the rotor nut “O” rings and
install in each nut. Apply a suitable food grade anti-seize
compound to the threads on each shaft and thread the
nuts onto each shaft.
Insert a plastic or other soft dowel to block rotor against
pump body, then tighten each nut to the torque listed in
Table 5.
If rotor nuts are not tightened to the specified torque
(as listed in Table 5), they could come loose, causing
damage to the pump.
Install a new cover “O” ring into cover groove, then
install cover onto pump body. Apply a suitable anti-seize
compound to the threads of the body studs and thread
cover nuts on studs.
Tighten each nut to the torque in Table 5. If cover nuts
are not tightened to the specified torque (listed in Table
5), body studs may break under high pressure.
Place cover “O” ring in groove, push cover over studs
making sure “O” ring remains in groove.
Attach wing nuts and tighten by striking with a soft
hammer.
Sterilize pump in accordance with accepted sterilization
procedures. Make sure no residual solution remains in
the pump.
GEAR BOX DISASSEMBLY
AND ASSEMBLY
FIGURE 13
SEAL FLUSH
INSTALLATION
4. PUMP HEAD ASSEMBLY
Slide body over shafts and studs taking care not to
damage seal parts. Press body firmly against gear case
engaging dowels. Install Allen head body hold down
bolts.
Apply a suitable lubricant to new rotor hub “O” rings and
install in grooves in rotor hubs. Slide rotors on to shafts.
Align keyways and install keys.
Assemble Belleville washers into rotor nuts with cone of
the washer pointing to the nut. See Figure 14. Apply a
suitable lubricant to washer new retaining “O” rings and
insert into the rotor nuts to retain the washers. Make
sure washer is not tight against the “O” ring.
GEAR BOX DISASSEMBLY
1. Remove pump head as described under Pump Head
and Seal Disassembly/Assembly and drain oil from
gear box.
2. Remove cap screws. Remove cover using soft hammer
to loosen.
3. Scrape sealant from gear box and cover.
4. Remove oil seal from cover using an arbor press. Discard
seal.
5. Using hammer and drift pin straighten locking tab on lock
washers.
6. Prevent shafts from turning by wedging a wooden block
between the gears.
7. Use a spanner wrench or drift pin to remove the gear
lock nuts.
8. When removing shafts, make sure shaft ends are
protected.
SECTION IOM TRA®20
ISSUE
H
PAGE 11 OF 23
9. Remove front bearing retainer bolts. Remove sealant
from retainers and gearbox, press out and discard
grease seals. (If retainers are stuck they will press
out when shaft is removed. Refer to cleaning process
described above once removed.)
Clearances for these dimensions. Clearance for both
rotors should be equal to avoid rotor-to-rotor contact. To
establish the correct shim thickness, make the following
measurements in 0.001 inches:
10. Place gear box on arbor press with pump head end
down. Protect shaft ends with a wooden block and press
shafts out of gear box.
B. Measure depth of rotor bore.
11. Remove sealant from bearing retainers, press out and
discard grease seals.
12. Remove shims. If they will be reused identify the shaft
on which they were used. Press out and discard rear
grease seals. Refer to Figure 15.
13. Use hydraulic press and V blocks to remove bearings
and spacer. Refer to Figure 16.
A. Measure body width.
C. Measure distance from gear box face to bottom of
front bearing pocket in gear box.
D. Slide rotor onto shaft and measure from back of
rotor to back of front bearing.
Do calculations for shim thickness:
A–B=X
C+X=Y
(Y – D) + required backface clearance (from Table
7 under Standard Clearances) = shim thickness.
Repeat measurements for second rotor.
5. Place shim stock in the required thickness against
shoulder in the bearing bore.
6. Place gearbox on arbor press with front (pump) end up.
Place shaft assemblies in gear box with spline end up
and with shafts in the correct location to provide top or
bottom drive as required. Press shafts into housing until
bearing is seated against shims.
FIGURE 15
FIGURE 16
GEAR BOX ASSEMBLY
1. Coat front bearing area of shaft with grease conforming
to ISO 220, NLGI grade 2 or NSF USDA-H1 and position
shaft in hydraulic press with spline down.
2. Place front bearing over shaft with shield side down.
Press onto shaft until bearing is seated against shoulder.
Place bearing spacer over shaft to seat on front bearing.
3. Coat rear bearing area on shaft with grease conforming
to ISO 220, NLGI grade 2 or NSF USDA-H1. Slide rear
bearing over shaft with shield side down. Press bearing
onto shaft until it seats against spacer. Refer to Figure 17.
7. Place body on gear box, making sure it is firmly seated.
Install rotors on shafts. Secure with rotor retaining nuts:
tighten first nut on shaft by striking nut wrench with soft
faced hammer, then tighten second nut against first in
the same way to jam nuts together. Check back face
clearance against value in Table 7. If necessary remove
rotors, then remove shafts to adjust shim thickness.
8. When back face clearance has been established in
accordance with the value shown in Table 7, remove body
and secure shaft assemblies in the gear box with bearing
retainers. Do not apply sealant at this time. Retainers
must seat firmly against the bearing and leave .050-.060”
clearance between retainer and gear box. Use shims if
needed to obtain this clearance. Refer to Figure 18.
FIGURE 18
FIGURE 17
For both front and rear bearing as described in 2 and 3 above,
shields must face bearing spacer.
4. Wright pumps have close running tolerances to
provide efficient operation. The position of the rotors is
controlled by the use of shims behind the front bearing
in the gear box . These shims control both the backface
clearance between the rotors and the bottom of the
rotor pocket in the housing and the clearance between
the rotors and the cover. See Table 7 under Standard
SECTION IOM TRA®20
ISSUE
H
PAGE 12 OF 23
9. Make sure backface clearance is correct. Remove
bearing retainers and grease both front and rear bearings
through grease fittings until grease is visible around ball
assemblies.
10. Install grease seals in bearing retainers. Coat seal lips
with grease conforming to ISO 220, NLGI grade 2 or NSF
USDA-H1. Coat retainer flanges with silicone sealant.
Install retainers. Refer to Figure 19.
SILICONE
SEALANT
STANDARD CLEARANCES
SEAL
REAR
(BACK FACE)
FIGURE 19
FRONT
(FRONT FACE)
A
RADIAL
(ROTOR TO BODY)
COAT WITH GREASE, AS STATED IN
GEAR BOX ASSEMBLY STEP 10
RADIAL
(ROTOR TO BODY)
11. Please keys into shaft key slots. Slide gear with single
punch mark onto drive shaft. Slide gear with two punch
marks onto short shaft, with punch marks aligned on
each side of single mark on drive gear.
12. Install lock washers and lock nuts onto shafts. Tighten
locknut with spanner wrench. Bend locking tab on
lockwasher to secure.
CROSSOVER
(WING TO HUB)
13.Press in rear seal with lip facing inward. Refer to
Figure 20.
A
FIGURE 20
Model
SECTION A-A
Clearance
Type ◊
Standard
14. Place silicone sealant on back of gear case and mount
cover assembly on case.
15. Fill gear case with oil as specified in Table 3.
Front
Face
0060
Hot
Extra
(Hot Choc)
Assemble pump head as described in Step 4 of Pump Head
and Seal Disassembly/Assembly.
Stainless
Steel
Standard
Front
Face
0150
Hot
Extra
(Hot Choc)
Stainless
Steel
Standard
0180
&
0240
Front
Face
Hot
Limit
Rotor
to Body
Front Back
Face Face
Wing
to Hub
Min
.0010
.0055 .0015
.0040
Max
.0035
.0065
Min
.0010
.0080 .0015
Max
.0035
.0090
Min
.0040
.0080 .0015
Max
.0050
.0090
Min
.0055
.0085 .0035
Max
.0065
.0095
Min
.0055
.0085 .0035
Max
.0065
.0095
-----------
Min
.0010
.0055 .0015
Max
.0035
.0065
---
Min
.0010
.0085 .0015
Max
.0035
.0095
---
Min
.0035
.0085 .0015
Max
.0045
.0095
Min
.0050
.0095 .0045
Max
.0060
.0105
Min
.0050
.0095 .0045
Max
.0060
.0105
Min
.0010
.0040 .0015
Max
.0035
.0050
Min
.0010
.0065 .0015
Max
.0035
.0075
Min
.0035
.0065 .0015
Max
.0045
.0075
-------------
Extra
(Hot Choc)
Min
.0045
.0075 .0045
Max
.0055
.0085
Stainless
Steel
Min
.0045
.0075 .0045
Max
.0055
.0085
-----
--.0065
--.0065
--.0070
--.0070
--.0065
--.0095
--.0095
--.0105
--.0105
--.0050
--.0075
--.0075
--.0085
--.0085
---
TABLE 7
SECTION IOM TRA®20
ISSUE
H
PAGE 13 OF 23
STANDARD CLEARANCES (CONT'D)
Model
Clearance
Type ◊
Standard
0300
&
0340
Front
Face
Hot
Extra
(Hot Choc)
Stainless
Steel
Standard
Front
Face
0450
Hot
Front Back
Face Face
Wing
to Hub
.0055
Min
.0010
.0045 .0020
Max
.0040
.0055
---
Min
.0010
.0075 .0020
Max
.0040
.0085
Min
.0040
.0075 .0020
Max
.0055
.0085
Min
.0045
.0085 .0050
Max
.0060
.0095
Min
.0045
.0085 .0050
Max
.0060
.0095
Min
.0030
.0060 .0040
Max
.0060
.0080
Min
.0030
.0100 .0040
Max
.0060
.0120
-------------
Min
.0065
.0100 .0040
Max
.0085
.0120
---
Min
.0075
.0110 .0070
Max
.0095
.0130
Stainless
Steel
Min
.0075
.0110 .0070
Max
.0095
.0130
Min
.0030
.0060 .0040
Max
.0060
.0080
Min
.0030
.0100 .0040
Max
.0060
.0120
Min
.0065
.0100 .0040
Max
.0085
.0120
Min
.0075
.0110 .0070
Max
.0095
.0130
Min
.0075
.0110 .0070
Max
.0095
.0130
Min
.0035
.0055 .0040
Max
.0065
.0085
Min
.0035
.0105 .0040
Max
.0065
.0135
Min
.0070
.0105 .0040
Max
.0090
.0135
Front
Face
Hot
Extra
(Hot Choc)
Stainless
Steel
Standard
1300
&
1340
Rotor
to Body
Extra
(Hot Choc)
Standard
0600
&
0640
Limit
Front
Face
Hot
Extra
(Hot Choc)
Stainless
Steel
-------------------
Min
.0075
.0125 .0070
Max
.0095
.0155
Min
.0075
.0125 .0070
Max
.0095
.0155
TABLE 7 (CONT'D)
SECTION IOM TRA®20
---
ISSUE
H
PAGE 14 OF 23
-----
Model
Standard
--.0085
Front
Face
--.0085
---
1800
.0095
.0095
Stainless
Steel
--.0055
Standard
--.0095
.0095
--.0105
2200
&
2240
--.0105
--.0040
.0080
2100
.0090
.0090
.0060
.0110
--.0120
--.0120
---
3200
Wing
to Hub
.0075
Min
.0055
.0060 .0050
Max
.0080
.0100
---
Min
.0055
.0115 .0050
Max
.0080
.0155
Min
.0095
.0115 .0050
Max
.0115
.0155
Min
.0105
.0105 .0085
Max
.0125
.0145
Min
.0105
.0105 .0085
Max
.0125
.0145
Min
.0055
.0065 .0050
Max
.0080
.0095
Min
.0055
.0120 .0050
Max
.0080
.0150
-------------
Min
.0095
.0120 .0050
Max
.0115
.0150
---
.0105
.0110 .0085
.0125
.0140
Stainless
Steel
Min
.0105
.0110 .0085
Max
.0125
.0140
Min
.0080
.0095 .0050
Max
.0110
.0125
Min
.0080
.0150 .0050
Max
.0110
.0180
Min
.0125
.0145 .0050
Max
.0145
.0175
Min
.0125
.0175 .0110
Max
.0145
.0205
Min
.0125
.0175 .0110
Max
.0145
.0205
Hot
Front
Face
---
Front Back
Face Face
Min
Standard
---
Rotor
to Body
Max
Stainless
Steel
---
Limit
Extra
(Hot Choc)
Extra
(Hot Choc)
---
.0110
Hot
Front
Face
-----
Front
Face
Standard
---
.0080
Hot
Extra
(Hot Choc)
---
---
Clearance
Type ◊
Hot
Extra
(Hot Choc)
Stainless
Steel
---------------
Min
.0080
.0085 .0050
Max
.0110
.0115
Min
.0080
.0145 .0050
Max
.0110
.0175
Min
.0125
.0135 .0050
Max
.0145
.0165
-------
Min
.0125
.0165 .0110
Max
.0145
.0195
Min
.0125
.0165 .0110
Max
.0145
.0195
TABLE 7 (CONT'D)
-----
--.0130
--.0130
--.0120
--.0120
--.0080
--.0140
--.0140
--.0130
--.0130
--.0095
--.0150
--.0150
--.0175
--.0175
--.0085
--.0145
--.0135
--.0165
--.0165
---
TRA20 EXPLODED VIEW
Item
Description
Item
Description
1
Capscrew, Gear Case Cover, SS
25
Rotor Key
1a
Washer GC Cover Capscrew, SS
26
Bearing Retainer Front
2
Oil Seal - Gear Case Cover
27
Grease Seal Front Brg Ret
3
Oil Level, Drain Plug, SS
28
Button Head Capscrew, Brg Ret, SS
Gear Case Cover, Steel (Powder Coated, White)
29
Stop Pin, Seal
Gear Case Cover, Stainless Steel
30
Dowel (upper gear case)
4
5
Lock Nut - Gear
31
Dowel Pin,Lower Gear Case Side
6
Lock Washer - Gear
32
Pump Body
7
Gear Drive Shaft
33
Rectangular Flange O Ring
8
Gear Short Shaft
34
Dowel Pin,Lower Cover Side
9
Key, Gear
35
Dowel Pin, Upper Cover Side
10
Gear Case, Cast Iron (Powder Coated, White)
36
Rotor Hub O Ring
37
11
Oil Seal Rear
12
Grease Fitting ¼-28, SS
13
Gear Case Base, Cast Iron (Powder Coated, White)
14
Socket Head Capscrew, Mounting Shim, SS
38
39
Body Retaining Screw
Twin Blade Rotor, Upper
Single Wing Rotor, Lower
Rotor Nut O Ring
15
Stud for Cover
40
Retainer O Ring
16
Dowel Bushing, Lower
41
Washer, Belleville
17
Dowel Bushing, Upper
42
Rotor Nut
18
Spacer Gear to Rear Bearing
43
Cover O Ring
19
Rear Bearing
44
Pump Cover
20
Spacer Bearing
45
Hex Nut
21
Shim Kit
46
Large Cleanout Plug
22
Front Bearing
47
Drive Shaft Key
23
Drive Shaft
48
Seal Guards, SS
24
Short Shaft (17-4PH) Model 0450 TRA20
49
Fastner, Seal Guard
SECTION IOM TRA®20
ISSUE
H
PAGE 15 OF 23
FASTENER TORQUE RANGE
Item
No.
45
Description Location
Qty / Pump
Front
Acorn Nut
Size (in)
Cover
(Dome
to Rotor Torque (N-m)
Nut)
Case
Torque (lbf-ft)
Qty / Pump
42
Rotor
Retainer*
Size (in)
Rotor to
Shaft Torque (N-m)
Torque (lbf-ft)
37
Qty / Pump
Socket
Rotor
Size (in)
Head Cap Case to
Gearbox Torque (N-m)
Screw
Torque (lbf-ft)
Cap
Screw
28
15
Stud
Qty / Pump
Bearing
Size (in)
Retainer
to
Torque (N-m)
Gearbox
Torque (lbf-ft)
Qty / Pump
Front
Size (in)
Cover to
Torque
(N-m)
Gearbox
Torque (lbf-ft)
Item No.
45
0150
0180
8
8
8
1/4"-20
1/4"-20
1/4"-20
9
9
9
Stud
5
0180
Locknut
Drive /
Lay
Shaft
Qty / Pump
2
2
2
Size (in)
N-05
N-05
N-05
Torque (N-m)
102
102
102
Torque (lbf-ft)
75
75
75
4
4
4
Qty / Pump
6
6
6
Size (in)
1/4"-20
1/4"-20
1/4"-20
8.1-9.5
8.1-9.5
8.1-9.5
6-7
6-7
6-7
7/16"-14
7/16"-14
7/16"-14
68
68
68
50
50
50
1
Cap
Screw
2
2
2
1/4"-20
1/4"-20
1/4"-20
8.1-9.5
8.1-9.5
8.1-9.5
6-7
6-7
6-7
8
8
8
1/4"-20
1/4"-20
1/4"-20
8.1-9.5
8.1-9.5
8.1-9.5
6-7
6-7
6-7
8
8
8
1/4"-20
1/4"-20
1/4"-20
8.1-9.5
8.1-9.5
8.1-9.5
6-7
6-7
6-7
14
49
Qty / Pump
4
Socket
Size
(in)
5/16"-18
Mounting
Head Cap
Foot
Torque (N-m) 14.9-16.3
Screw
Torque (lbf-ft)
11-12
Socket
Head Cap
Screw
Finger
Guard
Bearing Retainer to Gearbox
ISSUE
H
PAGE 16 OF 23
14.9-16.3
14.9-16.3
11-12
11-12
8
8
8
#8-32
#8-32
#8-32
Torque (N-m) 13.56-27.12 13.56-27.12 13.56-27.12
Torque (lbf-ft)
10-20
0450
10-20
0600
10-20
1300
Qty / Pump
8
8
8
8
Size (in)
5/16"-18
3/8"-16
3/8"-16
3/8"-16
Torque (N-m)
15
76
76
34
Torque (lbf-ft)
11
56
56
25
Qty / Pump
4
4
4
4
Size (in)
5/8"-11
5/8"-11
5/8"-11
5/8"-11
Torque (N-m)
163
339
339
339
Torque (lbf-ft)
120
250
250
250
Qty / Pump
2
2
2
2
Size (in)
1/4"-20
3/8"16
3/8"16
3/8"16
Torque (N-m)
8.1-9.5
27.1-29.8
27.1-29.8
27.1-29.8
Torque (lbf-ft)
6-7
20-22
20-22
20-22
Qty / Pump
8
8
8
8
Size (in)
5/16"-18
3/8"-16
3/8"-16
3/8"-16
Torque (N-m)
14.9-16.3
27.1-29.8
27.1-29.8
27.1-29.8
Torque (lbf-ft)
11-12
20-22
20-22
20-22
Qty / Pump
8
8
8
8
Size (in)
5/16"-18
3/8"-16
3/8"-16
3/8"-16
Torque (N-m)
14.9-16.3
27.1-29.8
27.1-29.8
27.1-29.8
Torque (lbf-ft)
11-12
20-22
20-22
20-22
Qty / Pump
2
2
2
2
Size
N-07
N-09
N-09
N-09
Torque (N-m)
136
190
190
190
Torque (lbf-ft)
100
140
140
140
TABLE 8
SECTION IOM
4
5/16"-18
Size (in)
Note: Installation of this part requires the use of an FDA approved food-grade anti-seize compound.
TRA®20
4
5/16"-18
Qty / Pump
0300
Rotor Case to Gearbox
Drive / Lay Shaft
Gearbox
Cover Torque (N-m)
Torque (lbf-ft)
Front Cover to Gearbox
Locknut
0150
7
Rotor to Shaft
Socket Head Cap Screw
15
5
0060
Description Location
7
Front Cover to Rotor Case
Rotor Retainer*
Cap Screw
No.
Location
Acorn Nut (Dome Nut)
28
Item
7
Description
42
37
0060
FASTENER TORQUE RANGE (CONT’D)
Item No.
1
14
49
Item No.
45
42
37
28
15
5
1
Description
Cap Screw
Socket Head Cap Screw
Socket Head Cap Screw
Description
Acorn Nut (Dome Nut)
Rotor Retainer*
Socket Head Cap Screw
Cap Screw
Stud
Location
Gearbox Cover
Mounting Foot
Finger Guard
Front Cover to Rotor Case
Rotor to Shaft
Rotor Case to Gearbox
Bearing Retainer to Gearbox
Cap Screw
Drive /
Lay Shaft
Gearbox Cover
0450
0600
1300
Qty / Pump
6
6
6
6
Size (in)
1/4"-20
3/8"-16
3/8"-16
3/8"-16
Torque (N-m)
8.1-9.5
27.1-29.8
27.1-29.8
27.1-29.8
Torque (lbf-ft)
6-7
20-22
20-22
20-22
Qty / Pump
4
4
4
4
Size (in)
3/8"16
1/2"-13
1/2"-13
1/2"-13
Torque (N-m)
27.1-29.8
58.3-63.7
58.3-63.7
58.3-63.7
Torque (lbf-ft)
20-22
43-47
43-47
43-47
Qty / Pump
8
8
8
8
Size (in)
#8-32
#8-32
#8-32
#8-32
Torque (N-m)
13.56-27.12
13.56-27.12
13.56-27.12
13.56-27.12
Torque (lbf-ft)
10-20
10-20
10-20
10-20
1800
2100
2200
3200
Qty / Pump
8
8
8
8
Location
Front Cover to Gearbox
Locknut
0300
Size (in)
7/16"-14
5/8"-11
7/16"-14
5/8"-11
Torque (N-m)
149
214
149
214
Torque (lbf-ft)
110
158
110
158
Qty / Pump
4
4
4
4
Size (in)
1"-8
1-1/8"-7
1"-8
1-1/8"-7
Torque (N-m)
441
508
441
508
Torque (lbf-ft)
325
375
325
375
Qty / Pump
2
2
2
2
Size (in)
3/8"-16
3/8"-16
3/8"-16
3/8"-16
Torque (N-m)
27.1-29.8
27.1-29.8
27.1-29.8
27.1-29.8
Torque (lbf-ft)
20-22
20-22
20-22
20-22
Qty / Pump
8
8
8
8
Size (in)
3/8"-16
5/16"-18
3/8"-16
5/16"-18
Torque (N-m)
27.1-29.8
14.9-16.3
27.1-29.8
14.9-16.3
Torque (lbf-ft)
20-22
11-12
20-22
11-12
Qty / Pump
8
8
8
8
Size (in)
7/16"-14
5/8"-11
7/16"-14
5/8"-11
Torque (N-m)
42.0-46.1
124.7-136.9
42.0-46.1
124.7-136.9
Torque (lbf-ft)
31-34
92-101
31-34
92-101
Qty / Pump
2
2
2
2
Size
N-11
N-13
N-11
N-13
Torque (N-m)
312
434
312
434
Torque (lbf-ft)
230
320
230
320
Qty / Pump
6
6
6
6
Size (in)
3/8"-16
3/8"-16
3/8"-16
3/8"-16
Torque (N-m)
27.1-29.8
27.1-29.8
27.1-29.8
27.1-29.8
Torque (lbf-ft)
20-22
20-22
20-22
20-22
Note: Installation of this part requires the use of an FDA approved food-grade anti-seize compound.
TABLE 8 (CONT'D)
SECTION IOM TRA®20
ISSUE
H
PAGE 17 OF 23
FASTENER TORQUE RANGE (CONT’D)
Item No.
14
49
Description
1800
Location
Socket Head Cap Screw
Socket Head Cap Screw
Mounting Foot
Finger Guard
2100
2200
3200
Qty / Pump
4
4
4
4
Size (in)
1/2"-13
1/2"-13
1/2"-13
1/2"-13
Torque (N-m)
58.3-63.7
58.3-63.7
58.3-63.7
58.3-63.7
Torque (lbf-ft)
43-47
43-47
43-47
43-47
Qty / Pump
8
4
8
4
Size (in)
#8-32
#8-32
#8-32
#8-32
Torque (N-m)
13.56-27.12
13.56-27.12
13.56-27.12
13.56-27.12
Torque (lbf-ft)
10-20
10-20
10-20
10-20
Note: Installation of this part requires the use of an FDA approved food-grade anti-seize compound.
TABLE 8 (CONT'D)
CARE OF STAINLESS STEEL
ASTM A-494
Stainless steel components used in products made by
Wright Flow Technologies are produced using methods that
preserve the corrosion resistant property of stainless steel.
The following precautions must be observed in use and
cleaning to maintain corrosion resistance:
ASTM A-494 is the standard rotor material for TRA20 CPP
pumps. This alloy was developed specifically for corrosion
resistance and close operating clearance requirements of
high performance rotary positive displacement pumps. ASTM
A-494 is a nickel based, corrosion-resistant, non-galling or
seizing material. The ASTM designation is A-494 Grade
CY5SnBiM (UNS N26055), and the material is listed in the
3-A Sanitary Standards as acceptable for product contact
surfaces.
1. Hydrochloric acid, even with added inhibitors, is NOT
recommended for cleaning due to its corrosion producing
properties.
2. Pitting can occur when stray electrical currents contact
wet stainless. Check electrical devices on a regular
basis for improper grounding, damaged insulation or
other defects that might cause stray currents.
3. Objects in contact with stainless steel prevent the air
from drying and reforming the protective oxide film on
the stainless, therefore don’t leave tools, rubber mats
etc. in contact with stainless pump components.
4. Utilize conditioned water where necessary to prevent
foreign matter in the water from causing pitting or
deposits that may prevent thorough cleaning.
5. Immediately rinse equipment with warm water after use,
then clean as soon as possible. Pitting may occur under
particles of product left on pump surfaces.
6. Use only recommended cleaning compounds from
reputable suppliers, and use only as specified by the
manufacturer, to prevent pitting, stress cracking and
surface discoloring.
7. Scratches and metal particles embedded into stainless
may cause corrosion over time. Use only non-metallic
brushes and pads for hand cleaning.
8. Chemical bactericides must be used at the lowest
permissible concentration, temperature and time. Follow
directions supplied by the manufacturer and local health
authority. Chlorine and other halogens may destroy the
protective film while increased temperatures increase
chemical activity which accelerates corrosion. Inspect
joints for properly sealed gaskets in joints; crevices
caused by improperly seated gaskets will promote crevice
corrosion, particularly in the presence of chlorine.
9.
Check all equipment for evidence of pitting and discolored
surfaces and for stress cracks. Remove deposits and
color from surfaces immediately using mild scouring
powder and detergents. Rinse thoroughly and air dry to
promote reformation of the protective oxide film.
SECTION IOM TRA®20
ISSUE
H
PAGE 18 OF 23
The above properties make ASTM A-494 the ideal material
for Wright Flow Technologies CPP pumps. The non-galling
rotors permit close operating clearances in the liquid end.
This provides low slip and minimum shear damage. The
rotors will not gall or seize if they come in contact with the
body or cover during operation.
The corrosion resistance of ASTM A-494 is approximately
equal to AISI 300 Series Stainless Steel. However, ASTM
A-494 has limited resistance to certain aggressive chemicals
that may be commonly used in contact with AISI 300 Series
Stainless Steel.
Do not use ASTM A-494 in contact with nitric acid. Nitric acid
is commonly used to passivate new installations of stainless
steel equipment. Do not allow nitric acid based passivation
chemicals to contact ASTM A-494 rotors. Remove the rotors
during passivation and use a separate pump to circulate the
passivation chemicals. Also, if nitric acid-based CIP cleaning
chemicals are used, remove the rotors prior to CIP cleaning
and clean them separately by hand in a mild detergent.
If you have any questions regarding other aggressive
chemicals, please contact Wright Flow Technologies
Application Engineering for assistance.
ELASTOMER SEAL REPLACEMENT
FOLLOWING PASSIVATION
Passivation chemicals can damage product contact areas
of Wright Flow Technologies equipment. Elastomers (rubber
components) are most likely to be affected. Always inspect
all elastomer seals after passivation is completed. Replace
any seals showing signs of chemical attack. Indications
bay include swelling, cracks, loss of elasticity or any other
noticeable changes when compared with new components.
TROUBLESHOOTING GUIDE
A properly sized and installed pump should provide troublefree operation; however, problems in pumping systems may
POSSIBLE CAUSE(S)
PROBLEM
Pump not turning
occur over time. The following information may help in
identifying and resolving such problems:
SOLUTION(S)
Drive motor not running
Check circuit breakers, fuses
Keys sheared or missing
Replace keys
Drive belts, etc. slipping or broken
Adjust or replace
Shaft or gears sheared
Replace
No flow, pump turning
Rotation in wrong direction
Reverse rotation
No flow, pump not priming
Inlet valve closed
Open valve
Inlet line clogged
Clean line and filters
Air leaks because of bad seals and/or pipe
connections
Replace seals, pressurize lines to check for
leakage
Speed of pump too slow
Increase speed, fill inlet lines, install foot valve
Liquid drains or siphons
Install foot or check valves
Air lock due to fluids that may vaporize or allow gas
to come out of solution
Install air bleed in lines near pump
Excess clearance between rotors, body and cover
Increase pump speed, install foot valve, have pump
rebuilt
Net inlet pressure too low
Check Net Inlet Pressure Available at Pump and
Net Inlet Pressure Required by Pump. Calculate
system and modify inlet system as needed.
With vacuum inlet system, atmospheric “blow back”
prevents pump from starting flow
Install check valve in discharge line
No flow
Relief valve not properly adjusted or held open by
foreign material
Adjust or clear valve
Fluid vaporization
(starved Pump inlet)
Filters, valves, inlet filters or lines clogged
Clean
Inlet line too small or too long, too many valves or
fittings, filter too small
Make necessary changes
Net Inlet Pressure Available at Pump too low
Increase level in source tank or pressurize tank
Select larger pump with less inlet pressure required
Insufficient flow
Relief valve not adjusted
or held
Viscosity of pump fluid higher than anticipated
Reduce pump speed (lower flow will result) or
modify system
Temperature of fluid higher than anticipated
Provide cooling, reduce speed,
modify system to increase available inlet pressure
Speed too low
Increase speed
Air leaks because of bad seals and/or pipe
connections
Replace seals, pressurize lines to check for
leakage
Adjust/clean
Open
Flow diverted in system
Check system valves and controls
Hot clearance rotors used with “cold” or low
viscosity fluid
Replace with standard rotors
Worn pump
Increase speed, recondition pump
Pressure too high
Modify system
SECTION IOM TRA®20
ISSUE
H
PAGE 19 OF 23
TROUBLESHOOTING GUIDE (cont’d)
Noisy operation
Cavitation due to high fluid Viscosity, high vapor
pressure or high temperature
Reduce speed and/or temperature, modify system
Inlet Pressure Available less than Inlet Press
Required
Modify System
Air or gas in system due to system leaks
Fix leaks
Dissolved gas or naturally aerated products
Reduce discharge pressure, reduce speed and/or
temperature, modify system
Rotor to body contact
Check back face and rotor to cover clearances and
reshim as necessary
Check for distortion of pump due to Installation of
piping. Reassemble pump and/or re-install piping
Pump overheats, stalls,
draws excessive current
(trips breaker, blows fuses)
Pump service life not as
long as expected
SECTION IOM TRA®20
ISSUE
H
Pressure higher than pump is Rated
Reduce pressure
Worn bearings or gears
Replace as needed, ensure regular lubrication
Rotor to rotor contact noise due to twisted shaft,
sheared keys, loose or mistimed gears, worn
splines
Rebuild with new parts as needed
Relief valve chattering
Readjust, repair or replace valve
Drain train components
Lubricate, repair or replace as needed
Higher viscous losses than anticipated
If pump is within rating, increase drive size
Pressure higher than anticipated
Reduce speed, increase line size
Fluid colder than anticipated, high viscosity
Heat fluid/insulate and heat lines, increase running
clearances
Fluid sets up during shutdown
Insulate or heat lines, install recirculating or “soft
start” drive, flush with different fluid
Fluids such as chocolate, latex build up on internal
pump surfaces
Increase running clearances
Misalignment of drive and piping, excessive pump
overhang
Align piping and drive
Abrasive fluid
Use larger pump at slower speed
Bearings and gears lack lubrication
Establish and follow lubrication schedule
Speeds and pressures higher than pump is rated
Reduce speed and pressures by system
modification
Pump corrodes
Upgrade material used in pump
PAGE 20 OF 23
FOR ATEX PUMPS ONLY
INCORRECT INSTALLATION, OPERATION, OR MAINTENANCE OF EQUIPMENT MAY CAUSE SEVERE PERSONAL
INJURY OR DEATH AND/OR EQUIPMENT DAMAGE AND MAY INVALIDATE THE WARRANTY.
This information must be read fully before beginning installation, OPERATION, or maintenance and must be
kept with the pump. SUITABLY TRAINED OR QUALIFIED PERSONS MUST UNDERTAKE ALL INSTALLATION AND
MAINTENANCE only.
DANGER !
Failure to follow the listed precautionary
measures may result in serious injury
or death are identified by the following
symbol:
!
Insure that the pump is grounded (earthed) with
the connection provided and that the motor,
gear reducer, base plate and other components
are adequately grounded. Failure to ground
equipment may result in an explosion causing
death or serious injury.
!
Provide a means to monitor all sensing equipment.
Failure to do so may cause unacceptable build
up of temperature or pressure which could result
in an explosion causing death or serious injury.
!
Install ATEX conforming guards as required to
meet EC Directives.
!
Conduct all maintenance activities as detailed in
the pump manual. Failure to do so may cause
pump failure could result in an explosion causing
death or serious injury.
!
!
Wright ATEX pumps are sold to be coupled with
a motor, and usually be mounted on a base
plate. The motor, other electrical equipment,
gear reducers, couplings, guards and base
plates must comply with ATEX requirements.
The motor, gear reducer, sensors, and other
associated electrical equipment must bear CE
and ATEX marking. Couplings must be ATEX
marked, and be accompanied by a Certificate
of Conformity. Failure to comply will void ATEX
Certification and may result in an explosion
causing death or serious injury.
ATEX EQUIPMENT GROUPS
Equipment - groups (Annex I of the EC-Directive 94/9/EC)
Group I
(mines, mine gas and dust)
Category M
Group II
(other explosive atmospheres gas/dust)
Category 1
1
2
for equipment providing
a very high level
of protection when
endangered by an
explosive atmosphere
for equipment providing
a high level of
protection when likely
to be endangered by an
explosive atmosphere
G
(gas)
(Zone 0)
D
(dust)
(Zone 20)
for equipment providing a
very high level of protection
when used in areas where
an explosive atmosphere is
very likely to occur
Category 2
G
(gas)
(Zone 1)
D
(dust)
(Zone 21)
for equipment providing
a high level of protection
when used in areas where
an explosive atmosphere is
likely to occur
Category 3
D
(dust)
(Zone 22)
G
(gas)
(Zone 2)
for equipment providing a
normal level of protection
when used in areas where
an explosive atmosphere is
less likely to occur
ATEX TAG USED ON WRIGHT ATEX CERTIFIED PUMPS
Group II
Category 2
Unit is suitable for environments
containing dust or gas
Temperature Class
SECTION IOM TRA®20
ISSUE
H
PAGE 21 OF 23
FOR ATEX PUMPS ONLY
RISK ASSESSMENT RELATING TO THE USE OF WRIGHT PUMPS
IN POTENTIALLY EXPLOSIVE ATMOSPHERES
Note: For a product to be suitable for an application it must be fit for its designated purpose and also be suitable for
the environment where it is installed.
Source Of Hazards
Potential Hazards
Frequency Of Hazards
Unvented cavities
Build up of explosive gas
Very Rare
Housing / Rotors /
Impellers / Front Cover /
Backplate
Unintended
mechanical contact
Recommended Measures
Ensure that pump is totally filled.
Consider mounting ports vertically.
Ensure that operating
pressures are not exceeded.
Rare
Ensure that sufficient
NPSH to prevent cavitation.
Service plan.
User must ensure temperature limits.
Excess temperature.
Pump external surfaces
Electrostatic charging.
Rare
Do not overfill gearboxes with lubricant.
Provide a ground contact for pump.
Service plan.
Pump liquid leakage.
Housing /
Cover ‘O’ ring
Build up of explosive gas.
Very Rare
Check selection of elastomers
are suitable for application.
Ensure cover retaining nuts are tight.
Service plan.
Pump liquid leakage.
Pump housing / cover /
Impeller / Backplate
Build up of explosive gas.
Very Rare
Excess temperature.
Unintended
mechanical contact.
Shaft seals
Selection of seal system must
be suitable for application.
Rare
Leakage.
Rotation direction test
Corrosion resistant materials.
Service as needed.
Build up of explosive gas.
Always provide seal flush
when so equipped.
Excess temperature
Ensure liquid is in pump chamber
before testing / Always provide
seal flush when so equipped.
Very Rare
Allow pump to run for minimum
period - a few seconds / See Manual
Excess Temperature.
Closed valve condition
Excess Pressure.
Rare
Mechanical contact.
Shaft
SECTION IOM TRA®20
Random induced current
ISSUE
H
PAGE 22 OF 23
Very Rare
Provide over-pressure protection.
See Manual.
Provide a ground contact for pump.
INSTRUCTION AND
MAINTENANCE MANUAL
SANITARY POSITIVE DISPLACEMENT PUMPS
SECTION
IOM TRA® 20
PAGE
23 OF 23
ISSUE
H
TRA® 20 SERIES
NOTES
WARRANTY
Wright Flow Technologies warrants all products
manufactured by it to be free from defects in
workmanship or material for a period of one (1) year
from date of startup, provided that in no event shall this
warranty extend more than eighteen (18) months from
the date of shipment from Wright Flow Technologies.
If, during said warranty period, any products sold
by Wright Flow Technologies prove to be defective
in workmanship or material under normal use and
service, and if such products are returned to Wright
Flow Technologies’ factory at Cedar Falls, Iowa,
transportation charges prepaid, and if the products
are found by Wright Flow Technologies to be defective
in workmanship or material, they will be replaced or
repaired free of charge, FOB. Cedar Falls, Iowa.
Wright Flow Technologies assumes no liability for
consequential damages of any kind and the purchaser
by acceptance of delivery assumes all liability for the
consequences of the use or misuse of Wright Flow
Technologies products by the purchaser, his employees
or others. Wright Flow Technologies will assume no
field expense for service or parts unless authorized by
it in advance.
Equipment and accessories purchased by Wright
Flow Technologies from outside sources which are
incorporated into any Wright Flow Technologies product
are warranted only to the extent of and by the original
manufacturer’s warranty or guarantee, if any.
THIS IS WRIGHT FLOW TECHNOLOGIES’
SOLE WARRANTY AND IS IN LIEU OF ALL
OTHER
WARRANTIES,
EXPRESSED
OR
IMPLIED, WHICH ARE HEREBY EXCLUDED,
INCLUDING IN PARTICULAR ALL WARRANTIES
OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. No officer or employee of
IDEX Corporation or Wright Flow Technologies, Inc. is
authorized to alter this warranty.
EUROPE & ASIA:
Wright Flow Technologies Ltd.
Highfield Industrial Estate, Edison Road, Eastbourne
East Sussex, United Kingdom, BN23 6PT
Phone: +44(0)1323 509211 • Fax: +44(0)1323 507306
E-mail: wright.eu@idexcorp.com
AMERICAS:
www.wrightflowtechnologies.com
Wright Flow Technologies, Inc.
406 State Street
Cedar Falls, Iowa 50613 U.S.A.
Phone: (319) 268-8013 • Fax: (803) 216-7686
E-mail: wright.usa@idexcorp.com
Wright Flow Technologies ● A Unit of IDEX Corporation
©Copyright 7/2017
Wright Flow Technologies
All rights reserved
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