Heater Catalog (Section) - High

High-Temperature Heaters
High-Temperature Heaters
Sheath Materials
MULTICELL™
Max. Operating
Temperatures
°F
°C
Typical Max.
Watt Densities
W/in2W/cm2
Page
2050
1120
30
4.6
425
High-Temperature FIREROD® Platen
1800
982
100
15.5
431
High-Temperature Tubular
Alloy 600
1800
983
30
4.6
432
Ceramic Fiber
Ceramic fiber
2200
1204
30
4.6
433
Alloy 800
High-Temperature Heaters
WATLOW®
423
424
WATLOW®
High-Temperature Heaters
MULTICELL™ Heaters
The advanced design of the MULTICELL™ insertion
heater from Watlow® offers three major advantages:
extreme process temperature capability, independent
zone control for precise temperature uniformity and
loose fit design for easy insertion and removal.
Performance Capabilities
• Engineered to achieve sheath temperatures up to
2050°F (1120°C)
• Up to six independently controllable zones
Multiple
Zoned Platens
3
2
1
6
5
4
No-heat Toe End
No-heat Section Designed for
Longer Element Life
Potting Cup to Seal
Electrical Termination
High-Temperature Flexible Leads
Wide Range of Terminations Available
High Grade MgO Insulation
Features and Benefits
Multiple, independently controllable zones
• Allows process temperature uniformity not possible with any other single-sheathed heater
Radiant design of heater
• Allows for loose insertion in boiling holes and
piping holes
• Permits easy removal and replacement with minimal down time since it will not bind or seize in the hole
Oxidized sheath
• Provides high emissivity and improves the heater’s performance as oxidation increases
Individual metal-sheathed coils swaged into a
larger, high-temperature alloy outer sheath
• Provides maximum protection against element
burnout through the outer sheath
Quick disconnect plug and jack
• Permits fast replacement of individual elements while the press stays at operating temperature
Special bending capabilities
• Solves unusual machinery needs and keeps leads away from heated zones
Flexible leads up to 842°F (450°C)
• Protects termination from high temperature environment
WATLOW®
High Temperature Alloy
for Outer Sheath
Cross Section
Zone 3
Zone 1
Resistance
Wire
Zone 2
Independently Controllable
Heated Zones
Typical Applications
•
•
•
•
•
•
•
•
•
•
•
Hot isothermal forming
Soil remediation
Hot forging dies
Heated platens
Super plastic forming
Heated platens (single and multiple zones)
Heat treating processes
Super plastic forming with diffusion bonding
Polysilicon ingots
Hot gas generation
Hazardous waste treatment systems
425
High-Temperature Heaters
MULTICELL Heaters
Applications and Technical Data
Definition of Terms
Heated Length ±2%
Independently
Controlled
Zone
Independently
Controlled
Zone
Independently
Controlled
Zone
8
50
6
40
30
4
20
2
10
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20
Process Temperature In Air (°F X 100)
Platen Or Oven Temperature In Air (°C )
200
1600°F
(870°C)
Max. W/in2 On Heater Element
1800°F
(980°C)
400
600
800
A
1000
10
B A = 6 cell, 0.935" diameter, 240VÅ(ac), 3-phase
60
B = 6 cell, 0.685" diameter, 240VÅ(ac), 3-phase
C C = 6 cell, 0.935" diameter, 480VÅ(ac), 3-phase
8
50
40
6
30
4
20
2
10
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20
Typical Cartridge Heater
Process Temperature In Air (°F X 100)
Typical Tubular Heater
High-Temperature Tubular Heater
10
THREE
ZONE MULTICELL ELEMENTS*
Maximum Allowable Watt Density Three Zone a
2050°F
(1120°C)
Watlow MULTICELL Heater
1000
B
70
Sheath Temperature
800
C
MULTICELL Heaters:
The High Temperature Choice
426
600
A
60
Cold
Toe
1.6 ± 5/16
1600°F
(870°C)
400
Max. W/cm2 On Heater Element
No-Heat
Section
Platen Or Oven Temperature In Air (°C )
200
70
Max. W/cm2 On Heater Element
Sheath Length
Maximum
Allowable
Watt DensityELEMENTS*
Single Zone a
SINGLE
ZONE
MULTICELL
Max. W/in2 On Heater Element
Lead
Wire
Length
Terminations
Cold Toe: A physical minimum requirement of
15/8 ± 5/16 inch
Independent Zone: Up to three, separately controlled
zones, which can be of varying lengths and wattages
Heated Length: The combined sum of all independent
zones
Wattage: Ratings are the combined sum of all
independent zones
A = 6 cell, 0.935 in. diameter, 240VAC, 3-phase
B = 6A cell,
0.685
diameter,
240VAC,
= 6 cell,
0.935" in.
diameter,
240VÅ(ac),
3-phase 3-phase
= 6 cell,
0.685" diameter,
240VÅ(ac),
3-phase 3-phase
C = 6B cell,
0.935
in. diameter,
480VAC,
C = 6 cell, 0.935" diameter, 480VÅ(ac), 3-phase
Note: Shaded area represents the Watlow offering, non-shaded area
contact your Watlow representative.
a Other designs and voltages with higher temperature capabilities are
available. Contact your Watlow representative.
WATLOW®
High-Temperature Heaters
MULTICELL Heaters
Applications and Technical Data (Continued)
Physical Design Parameters
0.935 Inch Diameter MULTICELL Heater
All bending of a MULTICELL heater is restricted to the
cold area of the heater. All bend radii points must be
1 in. (25 mm) from the hot/cold junction.
Sheath
Min.
Total Heated
Length No-Heat
Length
Diameter Bending Min./Max.
Length
Min./Max.
in.
Style
in. (mm)
in. (mm)
in. (mm)
0.935
Straight
14 (356) Contact Watlow
6 (152)
225 (5715) Contact Watlow 160 (4064)
“L”
90°
No-Heat
Straight Length
Heated Length
•
R
E
1 in. (25 mm)
Min.
l
Droop
Straight Length
No-Heat
Heated Length
•
X
17 (432) Contact Watlow
6 (152)
225 (5715) Contact Watlow 1721/2 (4382)
0.935
L
18 (457) Contact Watlow
6 (152)
225 (5715) Contact Watlow 1701/4 (4324)
0.935
Crank
23 (584) Contact Watlow
225 (5715) Contact Watlow
6 (152)
163 (4140)
0.935
Droop
18 (457) Contact Watlow
225 (5715) Contact Watlow
6 (152)
168 (4267)
Symbol
E
r
X
Min. Length 4
in. (mm)
(102)
21/2 (38)
11/2 (38)
Zones
R
E
0.935
Angle
r
1 in. (25 mm) Min.
l
1
2
Min. Heated 6
in. (mm)
(152)
6
(152)
R
l
21/2 (38)
12
(305)
3
6
(152)
0.685 Inch Diameter MULTICELL Heater
Straight
Straight Length
Heated Length
l
4 in.
(102 mm)
Min. No-Heat
Angle
Straight Length
Heated Length
No-Heat
l
1 in.
(25 mm)
Min.
Sheath
Min.
Total Heated
Length No-Heat
Length
Diameter Bending Min./Max.
Length
Min./Max.
in.
Style
in. (mm)
in. (mm)
in. (mm)
0.685
Straight
14 (356) Contact Watlow
225 (5715) Contact Watlow
0.685
Angle
17 (432) Contact Watlow
6 (152)
225 (5715) Contact Watlow 1731/2 (4407)
0.685
L
18 (457) Contact Watlow
225 (5715) Contact Watlow
6 (152)
172 (4369)
0.685
Crank
18 (457) Contact Watlow
225 (5715) Contact Watlow
6 (152)
163 (4267)
0.685 Droop 151⁄2 (394) Contact Watlow
225 (5715) Contact Watlow
6 (152)
170 (4331)
Symbol
E
Min. Length 4
in. (mm)
(102)
Crank
•
r
R
X
L
Straight Length
Heated Length
Zones
r
11/2
(38)
X
11/2
(38)
1
2
Min. Heated 6
in. (mm)
(152)
6
(152)
6 (152)
178 (4521)
R
11/2
(38)
l
12
(305)
3
6
(152)
1 in. (25 mm)
Min.
E
No-Heat
WATLOW®
427
High-Temperature Heaters
MULTICELL Heaters
Applications and Technical Data (Continued)
Tab Styles
Weldments to the MULTICELL Heater Element
1 in.
(25 mm)
Min.
1 in.
in.
)M
(25 mm
t
a
e
No-H
No-Heat
HTD Section
Hot Cold
Junction
Full View
1 in.
1 in.
1 in.
(25 mm) (25 mm)
(25 mm)
Slot*
Slot*
5⁄8 in.
5⁄8 in.
5⁄8 in.
(15.9 mm) (15.9 mm)
½ in.(15.9 mm)
½ in.
½ in.
(13 mm) (13 mm)
(13 mm)
Slot*
¾ in.
¾ in.
(19.1 mm)(19.1 mm) ¾ in.
(19.1 mm)
Slot*
Slot*
in.
1 in. Mm)
5m
(2
15⁄8 in. 15⁄8 in.
t in.
15⁄8
ea
(41.3 mm)(41.3
o-H(41.3
Nmm)
mm)
Slot*
15⁄8 in. 15⁄8 in.
15⁄8 in. 15⁄8 in.
(41.3 mm)(41.3 mm) 15⁄8 in.
(41.3 mm)(41.3 mm) 15⁄8 in.
(41.3 mm) 11⁄8 in. 11⁄8 in.
(41.3 mm) 5⁄8 in.
5⁄8 in.
11⁄8 in. 11⁄8 in.
5⁄8 in.
(28.6 mm)(28.6 mm) 11⁄8 in.
(15.88 mm)
(15.88 mm)
(28.6 mm)(28.6 mm) 11⁄8 in.
(28.6
mm)
(15.88 mm)
(28.6 mm)
3⁄8 in. R 3⁄8 in. R
(9.5 mm) (9.5 mm) 3⁄8 in. R
(9.5 mm)
½ in. R ½ in. R
* 5⁄16 in. (7.9
mm)
x 7⁄16mm)
in. (11.1
(13 mm) (13 mm) ½ in. R
* 5⁄16
in. (7.9
7⁄16mm)
in.
(11.1
* 5⁄16 in.x(7.9
mm)
x 7⁄16mm)
in. (11.1 mm)
(13 mm)
* 5⁄16 in. (7.9
x ¾ in.
(19x mm)
* 5⁄16mm)
in. (7.9
mm)
¾
in.
(19
mm)
* 5⁄16 in. (7.9 mm) x ¾ in. (19
mm)
O.D.
O.D.
O.D. Style S3
Style S2
I.D.
I.D.
I.D.
180°
180°
heater in place and keep180°
it
3⁄8 in. R 3⁄8 in. R
(9.5 mm) (9.5 mm) 3⁄8 in. R
(9.5 mm)
Style S1
in..
90° in. 1Min
90°
90°
)
Tabs and rings are1(2used
5 mm
in.to hold the
1 in.
mm) M
5 in.
(2
5⁄8
from creeping. N
Available
SS.mm)
-Heeaatt in carbon steel, 304 and 316 (25
(15.9omm)
H
Ring
No½ in.
5⁄8 in.5⁄8 in.(13 mm)
(15.9(15.9
mm) mm)
½ in.½ in.
Styles
(13 mm)
R (13 mm)
Dia.
Dia.
Dia.
R
1 in. 1 in.
(25 mm)
(25 mm)
R
R
15⁄8 in.
(41.3
mm)
15⁄8
in.
15⁄8 in.
Slot*
Slot*Slot*
R Dia.
R Dia.
Dia.
¾ in.
(19.1 mm)
Slot*
¾ in.¾ in.
(19.1(19.1
mm)mm)
Slot*Slot*
15⁄8 in.
15⁄8 in.
(41.3
15⁄8
in. mm)
(41.3 15⁄8
mm)
15⁄8
in.
15⁄8
in. QUARTER
QUARTER
WASHER WASHER
HALF WASHER
HALF WASHER
Full
Washer
in.
11⁄8 in.Full Washer
(41.3
mm)
(41.3
mm)
QUARTER
WASHER
HALF
WASHER
Full Washer
11⁄8
in.
(41.3
mm)
(41.3
mm)
(41.3(41.3
mm)mm)
mm)
11⁄8 in.
11⁄8(28.6
in.
(28.6
11⁄8 in.
11⁄8mm)
in.
. (28.6
mm)mm)
in(28.6
1 in. Mm)
(25 m
at
No-He
3⁄8 in. R 3⁄8 in. R
3⁄8
in. R
(9.5(9.5
mm)
(9.5 View
mm)
Full
mm)
(28.6(28.6
mm)mm)
5⁄8 in.
(15.88 mm)
5⁄8 in.5⁄8 in.
(15.88
(15.88
mm)mm)
3⁄8 in. R
½ in.
R
½
in.½
R in. R
(13
mm)
(13
mm)
(13 mm)
* 5⁄16
¾
in.mm)
(19mm)
mm)
*in.
5⁄16in.
in.(7.9
(7.9mm)
mm)
xx ¾
in.
(19
* 5⁄16
(7.9
mm)
x ¾ in.
(19
90° 90°
90°
180°
180°
180°
R mm)
(9.5
3⁄8 in.3⁄8
R in.
(9.5 mm)
(9.5 mm)
*in.
5⁄16(7.9
in. (7.9 xmm)
x (11.1
7⁄16 in.mm)
(11.1 mm)
in.
* 5⁄16 *in.5⁄16(7.9
mm)mm)
x 7⁄16 in.7⁄16
(11.1
mm)
O.D. O.D.O.D.
I.D. I.D. I.D.
in.
1 in. Mm)
(25 m
at
No-He
Dia. Dia.
Dia.
R
R
R
Style S4
QUARTER
WASHER
QUARTER
WASHER
428 QUARTER WASHER
R
R
R
Dia. Dia.
Dia.
Style S5
WASHER
HALFHALF
WASHER
HALF WASHER
Style H1
Full Washer
Full Washer
Full Washer
WATLOW®
High-Temperature Heaters
MULTICELL Heaters
Termination Standards
Ceramic Wedge with 10-32 Threaded
Terminals
Potting Sleeves
B
B
A
A
Heater O.D. Dimension A Dimension B
in.
in. (mm)
in. (mm)
Zone Phase Type No.
(19)
11/2(38)
1
1
61L
0.935
11/16(27)
11/2(38)
1
1
91L
0.935
11/16(27)
11/2(38)
1
3①
91L
0.685
①
3/4
AOV-15
3 wire only
Heater O.D. Dimension A Dimension B
in.
in. (mm)
in. (mm)
Zone Phase Type No.
0.685
11/4 (32)
11/4(32)
1
1
61T
0.935
15/8(41)
15/8(41)
1
1
91T
AOV-17
Potting Cups
Potting Cup for Right Angle Exit
B
B
A
A
Lead Wires
Heater O.D. Dimension A Dimension B
in.
in. (mm)
in. (mm)
Zone Phase Type No.
0.685
13/8 (35)
13/8 (35)
0.685
13/8
13/8
0.685
1
62L
(35)
3
1
62L
13/8 (35)
13/8 (35)
1
3
62L
0.685
13/8 (35)
13/8 (35)
2
3
62L
0.935
13/8 (35)
13/8 (35)
2
1
92L
0.935
13/8
13/8
(35)
3
1
92L
0.935
13/8 (35)
13/8 (35)
1
3
92L
0.935
13/8 (35)
13/8 (35)
2
3
92L
WATLOW®
(35)
2
(35)
AOV-16
Heater O.D. Dimension A Dimension B
in.
in. (mm)
in. (mm)
Zone Phase Type No.
0.685
0.935
(19)
11/2(38)
1
1 or 3
RAE1
11/16(27)
3/4
11/2(38)
1 AOV-15
1 or 3
RAE2
429
High-Temperature Heaters
MULTICELL Heaters
Termination Assemblies
All termination assemblies are available with
potting sleeves or cups, with or without
armor flex lead wire protection. Please specify
potting vessel and lead cover option
when ordering.
Omitted
Connectors
Ring
Spade
Connector Connector
Female
Faston
Male
Faston
Twist-Lock®
Plug
Termination illustrations shown with armor flex covering.
Options
Plug and Socket and Twist-Lock® Plug
Variations
Three zone heaters requiring a quick disconnect plug
will typically be supplied with a six contact plug and
socket. Twist-Lock® plug variations are typically supplied
with single zone MULTICELL heaters. When ordering
a Twist-Lock® plug, please specify the type as shown
below.
For any other plug variations, please contact your Watlow
representative.
Note: Mating connectors are also available for plug
terminations listed. Contact your Watlow representative.
Plug and Socket
Male Plug
Zones
Type
P406-CCT
3
6 wire
600
30
Straight
4570C
1
3 wire
250
15
Twist-Lock®
4720C
1
3 wire
125
15
Twist-Lock®
5266C
1
3 wire
125
15
Straight
5666C
1
3 wire
250
15
Straight
7102C
1
2 wire
250
20
Twist-Lock®
7545C
1
2 wire
250
15
Twist-Lock®
7567C
1
3 wire
125
10
Twist-Lock®
X
G
4720C
X
W
G
Y
W
F
W
W
W
4570C
7567C
7102C
7545C
Straight
1.44 in.
Y
(36.6 mm)
6 Contacts
F
W
W
W
W
5266C
430
Voltage Amperage Blade Type
Twist-Lock®
W
1 in.
(25 mm)
Plug and
Socket
Connector
5666C
WATLOW®
ed y
d
it
en il
t
b
Exapa
High-Temperature Heaters
C
Extended Capabilities For
High-Temperature (HT) FIREROD®
Heaters
The Watlow HT FIREROD heater is especially designed
for high temperature platen applications up to 1600°F
(871°C). The HT FIREROD heater utilizes the same
industry leading design principles used on all Watlow
FIREROD products. Advancing the FIREROD heater
enables it to withstand application temperatures up to
400°F (204°C) higher than standard cartridge heaters.
HT FIREROD design features, which are important in high
temperature applications, include:
• A specially constructed end seal that is virtually airtight to reduce the effects of resistance wire oxidation
• A high-temperature sheath that is treated to improve its emissivity for better heat transfer
Performance Capabilities
•
•
•
•
Platen temperatures up to 1600°F (871°C)
Maximum watt density up to 100 W/in2 (15.5 W/cm2)
Maximum voltage up to 277VAC ground
Length tolerance of +0, -4 percent standard diameters;
+0, -8 percent for special diameter
Made-to-Order Availability
Nominal Diameter
in.
1/2
5/8
3/4
1
Actual
Diameter
in.
0.496
0.580
0.621
0.710
0.746
0.960
0.996
±
±
±
±
±
±
±
0.004
0.004
0.004
0.004
0.004
0.004
0.006
High
Temperature
Seal*
Fiberglass Insulated
Crimped-on Leads
Optional
Ceramic
Beads
Max.
Amperes
10
23
23
46
46
46
46
Contact your Watlow representative for special diameter requests.
Nickel-chromium
Resistance Wire
MgO Insulation
Alloy 800 Sheath
Insulation
Boots
Conductor
Pins
3 in. (76 mm)
Min. No-Heat Section
* First 2 in. (51 mm) at lead end must be kept below 1000°F (538°C).
Features and Benefits
High-temperature seal
• Reduces exposure to the atmosphere, which
minimizes oxidation of the winding wires resulting in longer element life
Note: The first 2 in. (51 mm) must be outside of the platen in free air and less than 1000°F (538°C).
Alloy 800 sheath
• Transfers heat more efficiently
High emissivity sheath
• Provides better heat transfer and longer life
For detailed product and technical data,
see the full High-Temperature FIREROD product
section located on pages 36 through 37.
WATLOW®
431
High-Temperature Heaters
High-Temperature Tubular Heaters
Watlow manufactures high-temperature tubular heaters
to bridge the gap between standard tubular heaters and
Watlow MULTICELL™ heaters. This tubular is well suited
for process air heating applications in excess of 1300°F
(704°C), resulting in a maximum sheath temperature of
1800°F (983°C). Controlled lab testing between the new
design and current tubular designs show an increase in
life of approximately 50 percent.
The high-temperature tubular consists of an engineered
tubing with an outer sheath of alloy 600 and a special
internal construction. The outer sheath offers high
temperature capabilities, reduced oxidation as well as
corrosion resistance.
The tubular offering is available in 0.430 and 0.375 inch
diameters that are configurable either as formed tubulars
or process heaters. The heaters can also be welded to
flanges and plates for mounting purposes. Maximum
sheath length available is 275 inches for the 0.430 inch
and 0.375 inch diameters. The factory should be
contacted for longer sheath lengths.
Features and Benefits
Alloy 600 sheath material and a special internal
construction
• Assures high temperature performance and corrosion protection in tough applications
0.430 inch diameters*
• Allows heater to be configured to existing tubular designs that may be experiencing short life
*Note: 0.375 diameters are available in Watlow’s
extended capabilities, contact your Watlow
representative for details.
Dual-ended termination
• Installs into flanges and screw plugs similarly to standard product configurations
Bendable in standard formations
• Makes the heater easy to apply in a wide variety
of applications
Typical Applications
• High temperature ovens and furnaces
• Radiant heating
•Drying
• Environmental—VOC abatement
• Process air heating: duct heaters, circulation heaters
• Vacuum applications
• Flue gas cleaning (desulphurization)
• Fluidized beds
For detailed product and technical data,
see the full High-Temperature Tubular product
section located on pages 87 through 88.
432
WATLOW®
High-Temperature Heaters
Ceramic Fiber Heaters
Ceramic fiber heaters offer some of the highest
temperature heating element capabilities available in
the Watlow family of heaters. Heating units constructed
of ceramic fiber insulation isolate the heating chamber
from the outside. Ceramic fiber heaters are extremely
low mass, high insulation value units with self-supported
heating elements. Many applications can benefit from
the convenience of the heating element and insulation
combined into one package. Its lightweight, low-density
properties are ideally suited for high temperature
applications requiring low thermal mass.
Performance Capabilities
• Operating temperatures up to 2200°F (1204°C)
• Watt densities from 5 up to 30 W/in2 (0.8 to 4.6 W/cm2)
• Uses “radiant” heat transfer exclusively
Features and Benefits
High temperature ICA resistance elements
• Bounds integrally into required position
• Allows five element configurations
Lightweight, low-density alumina-silica composition
molded into shape
• Acts as insulation to isolate the heating chamber from the outside
• Provides low shrinkage fiber and inorganic binder • Ensures a firm, thermal shock resistant, self-supporting unit at all operating temperatures
Operating temperatures up to 2200°F (1204°C)
• Provides high temperature performance that is not
possible with many other heater types (See page 436 for detailed limits)
Low mass ceramic fiber insulation of 10 to 15 lb/ft3
(160 to 240 kg/m3)
• Allows the heater to reach process temperature quickly
• Allows the energy to heat the load instead of wasting energy on itself
Works directly off of common power line voltages
• Eliminates the need for expensive transformers or complex power control systems
• Enables compatibility with the full range of Watlow temperature controllers and power switching devices
WATLOW®
High
Temperature
ICA Heating
Element
Lightweight
AluminaSilica Fiber
Composition
Additional
Coating for
Added Strength
and Surface
Hardness
Ductile Alloy
Strip Leads
Thin, Tough, High Temperature Ceramic
Coating over Embedded Elements, plus
Optional High Emissivity Coating
Typical Applications
•
•
•
•
•
High temperature furnaces
Metal melting, holding and transfer
Semiconductor processing
Glass, ceramic and wire processing
Analytical instrumentation
433
High-Temperature Heaters
Ceramic Fiber Heaters
Options
Embedded Sinuated Elements
Flat Sinuated
V-Sinuated
• Available in either flat or V-sinuated element
configurations
• Advanced V-sinuated element configuration allows
up to 27 percent additional watt density over
embedded flat sinuated elements
• Performs best at medium to high temperatures at
medium watt density power requirements
• Use in partially enclosed to fully enclosed applications
• Especially well suited for large, flat units;
semi-cylindrical units above 5 in. (125 mm) I.D.;
and full cylinders above 4 in. (100 mm) I.D.
• Offers greater effective insulation thickness than coiled
element designs
• Enhances “heated insulation” concept of operational
use
• Features high emissivity coating on new high watt
density series units. When ordering, refer to charts on
pages 452 to 454.
434
Exposed Sinuated Elements
Flat Sinuated
V-Sinuated
• Available in either flat or V-sinuated element
configurations
• Advanced V-sinuated element configuration allows
up to 20 percent additional watt density compared to
exposed flat sinuated elements
• Offers the lowest possible wire-to-chamber
temperature difference for maximum heater life
• Provides optimum heat-up/cool-down and
recovery times as well as maximum operational
efficiency
• Higher current handling capabilities are possible
• Minimizes the number of circuits and connections in
large furnaces
• Especially well suited for large, flat surface area units
and large I.D. curved units
• Exposed elements are available on special order as a
variation of the embedded sinuated element normally
provided on stock and standard units. When ordering,
refer to charts on pages 452 to 454.
WATLOW®
High-Temperature Heaters
Ceramic Fiber Heaters
Application Hints
Applications
•
•
•
•
High temperature furnaces
Metal melting, holding and transfer
Semiconductor processing
Glass, ceramic
and wire
processing
•Analytical
instrumentation
• Fluidized beds
• Laboratory and R&D
• Other high
Embedded Coil Elements
temperature
process applications
• Optimum performance for high temperature, enclosed
furnace chambers
• Coiled elements readily conform to complex curved
surfaces, especially small custom chamber shapes
• Coiled element design works best in higher voltage,
lower current situations
• Use where lower watt density requirements and low
duty cycle operations are expected
• Available in stock and standard units of medium watt
density, rated up to 2000°F (1093°C). When ordering,
refer to charts on pages 449 to 451.
• Never use ceramic fiber heaters for conduction heating applications. These heaters are designed for radiant heat transfer only.
•Use appropriate mounting methods including pins,
washers, clamping straps, overlapping edge clamps,
interlocking edges, etc. Generally, these methods
work better than cementing ceramic fiber heaters, as
cementing will not accommodate the expansion and
contraction caused by thermal cycling of surrounding
metal structures.
•Keep furnace loads free of oils, lubricants and other
contaminants that can vaporize at high temperatures.
Ceramic fiber heaters have a porosity exceeding
90 percent and cannot be sealed against contamination
infiltration and possible damage to the heating
element wire.
WATLOW®
•Use low mass thermocouples that are responsive to
rapidly changing radiant energy transfer conditions.
Without proper temperature control, ceramic fiber
heaters can generate sufficient heat for self destruction.
•Mount a thermocouple junction directly above an
element and within 1/16 in. (1.6 mm) of the heated
surface. Embedded ceramic mounting tubes are
available as an option to position 0.125 in. (3.2 mm)
diameter thermocouples inside the fiber, directly behind
and between the elements. Heater wire operating
temperatures are critical and wires should be monitored
at the hottest point within the application.
•Electrical connections made in heated portions of the
application must be rated for the appropriate currents
and anticipate ambient temperatures. To ensure
good electrical connections, use compression-type
connection devices located as far away from the
hottest area of the application. This minimizes the
possibility of electrical connection degradation caused
by thermal expansion, contraction and high temperature
oxidation.
•Ceramic fiber products shrink at high temperatures.
During the first 24 hours of operation at temperatures
between 1600 and 2200°F (870 to 1204°C), shrinkage
of up to 4 percent can occur. Fill all gaps between units
created by shrinkage with loose ceramic fiber insulation.
Watlow offers a “pre-firing” process that pre-shrinks
and dimensionally stabilizes units before shipping.
Contact your Watlow representative for further details.
•Use additional back-up insulation for maximum energy
efficiency and appropriate safety considerations. Use
only insulation with inorganic fibers and binders to avoid
corrosive fumes that could damage heater elements.
•Handle all units and leads with care. Ceramic fiber
heaters are very resistant to thermal cycling and thermal
shock, but are easily subject to mechanical damage
from careless handling.
•Repair of minor mechanical damage, made with
unapproved or unknown cements, could damage the
wire elements at high temperatures. If unsure, contact
your Watlow representative before making repairs.
Several accessory items are available from the factory
for repair purposes.
435
High-Temperature Heaters
Ceramic Fiber Heaters
Performance Data
Performance Capabilities
The Performance graph shown below represents
capabilities of the five heater element configurations.
The curves compare upper temperature limits versus
permissible design watt densities to achieve a standard
heater life expectation of 2,000 hours.
As with all Watlow heaters, the major application concern
is the heater’s surface watt density as it relates to
the application temperature, such as with the furnace
chamber temperature or the radiant surface temperature.
When evaluating an application for temperature and
watt density requirements, it should fall to the left of and
below the performance limit lines. If the application falls
into this area, then it is in the safe performance area.
The further into this safe performance area, the higher the
life expectancy of the heater. If an application requires
temperatures or watt densities that fall into the area to the
right of and above the lines, then the application operates
beyond the heater’s typical design or performance
limits. Using a heater required to perform in this area
of the graph may result in a shorter life expectancy.
For information specific to an application, contact
your Watlow representative.
General Guidelines: Upper Limit Lines for Heater Performance
vs. Maximum Application Temperatures
Hot Face Surface Watt Density—W/cm2
3.0
4.0
5.0
6.0
1300
Beyond Design/Performance Limits
2200
1200
2000
1100
S
1800
Em
T
d
se
po
nu
Safe Performance Area
1000
0
2
4
6
8
ed
at
1200
900
800
ed
at
Si
nu
ed
Si
dd
be
1400
1000
Ex
p
dd ose
ed d
V- V-S
i
Si
nu nua
at te
ed d
be
Ex
Em
1600
il
Co
Furnace Chamber or Load Temperature—°F
2.0
"Black Body" Radiant Temperature
700
600
Furnace Chamber or Load Temperature—°C
1.0
2400
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38
Hot Face Surface Watt Density—W/in2
436
WATLOW®
High-Temperature Heaters
Ceramic Fiber Heaters
Performance Data (Continued)
to maintain furnace temperature. This data averages
test results performed for two typical types of furnace
chambers, and should not be used for specification
purposes.
The following graphs provide technical data to help
evaluate performance and select the correct ceramic fiber
heater for an application.
The four graphs shown represent performance data for
heat-up/cool-down rates and power requirements
Small, Full Cylinder, Heated Chambers
insulation. No additional insulation or metal sheath
was added to the outside diameter. Temperature was
measured by a thermocouple located in the geometric
center of the chamber.
Heat-Up and Cool-Down Rates —Small Full Cylinders
2400
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
1200
1000
13/4 in. (44 mm) I.D. Full Cylinder
Average of 6 Sizes
3/4 in. (19 mm) I.D. Full Cylinder
800
600
400
200
2
4
6
8
10
12
14
16
18
20
22
24
26
Chamber Temperature—°C
Chamber Temperature—°F
Test conditions for small, full-cylinder heated chambers
are typical of analytical instrumentation furnaces. Several
stock sizes are represented. Units tested were 6 in.
(150 mm) long, mounted in a vertical orientation. Both
ends were capped with 1 in. (25 mm) of ceramic fiber
0
Elapsed Time—Minutes
Power Requirements
This represents the efficiency of these heaters in this
mounting configuration.
Shown below are percentages of rated power needed
to achieve and hold specific temperatures inside the full
cylinder chambers tested.
Power Requirements to Hold Temperature—
Small Full Cylinders
2400
1200
2000
1000
1800
1600
800
1400
1200
600
1000
3/4
1
in. (44 mm) I.D. Full Cylinder
Average of 6 Sizes
3/4 in. (19 mm) I.D. Full Cylinder
800
600
400
400
200
Chamber Temperature—°C
Chamber Temperature—°F
2200
200
10
20
30
40
50
60
70
80
90
0
100
Percent of Rated Power
WATLOW®
437
High-Temperature Heaters
Ceramic Fiber Heaters
Performance Data (Continued)
Medium Sized, Insulated Closed Chambers
Temperature heat-up rates were measured by
thermocouples in three places: at the element, on
the heater surface and at the center-of-chamber. Data
for various additional wall thicknesses is also shown. This
is typical of how large, flat and semi-cylindrical units are
used. The chamber was oriented vertically with top and
bottom disks of ceramic fiber insulation equal to
wall thickness.
Test conditions for medium-sized, insulated chambers are
typical of pit and box furnaces, large tube furnaces and
pipe and reactor heating. Standard embedded coil units
(Watlow part number VS412A12S) were used and rated
for 2000°F (1093°C). The test chamber size was
12 in. long and 12 in. I.D. (305 X 305 mm). The volume
was approximately 0.75 ft3 (0.02 m3).
Heat-Up and Cool-Down Rates—
Medium Sized, Insulated, Closed Chamber
2400
Controlling Begins
2200
1200
2000
Temperature—°F
1600
800
1400
1200
}
}
Element
Heater Hot Face
Chamber
6 in. (152 mm) Wall
4 in. (102 mm) Wall
2 in. (51 mm) Wall
1000
800
600
400
600
Heat Up
400
Cool Down
Temperature—°C
1000
1800
200
200
2
4
6
8
10
12
14
16
18
20
22
24
26
0
Elapsed Time—Minutes
Power Requirements
medium-sized, insulated chambers. This represents the
efficiency of these heaters in this mounting configuration.
Shown below are the percentages of rated power needed
to achieve and hold specific temperatures inside of
Power Requirements to Hold Temperature—
Medium Sized Insulated, Closed Chamber
m)
Equilibrium Temperature—°F
2200
n.
6i
2000
m
52
(1
m)
2m
. (10
4 in
. (51
2 in
1200
)
mm
1000
1800
1600
800
1400
1200
600
1000
800
400
Element Temperature
Heater Surface Temperature
(3 Wall Thicknesses Shown)
600
400
200
Equilibrium Temperature—°C
2400
200
5
10
15
20
25
30
35
0
40
Percent of Rated Power—100% = 5000 W
438
WATLOW®
High-Temperature Heaters
Ceramic Fiber Heaters
Performance Data (Continued)
Insulation Effectiveness
Heat Loss and Energy Transfer
The graphs below illustrate the effectiveness of adding
6 lb/ft3 (96 kg/m3) blanket insulation to the backside of
standard 2 in. (50 mm) thick ceramic fiber heaters. Total
wall thickness of up to 6 in. (152 mm) is shown. Data is
for vertical sides without metal sheathing. Top and bottom
surfaces and surfaces with metal sheaths covering ceramic
fiber insulation will vary.
For general calculations of heat loss and energy transfer,
the Insulation K-Factors and Emissivity graphs are helpful.
The K-Factors graph is for ceramic fiber heaters and
the ceramic fiber insulation blanket typically used with
the heaters. This blanket is offered as an accessory by
Watlow.
400
350
300
250
200
150
Thermal Conductivity
BTU-in
hr-ft2-°F
External Temperature—°F
450
External Surface Temperatures (°F)
2200°F Chamber
2000°F Chamber
1800°F Chamber
1600°F Chamber
1400°F Chamber
1200°F Chamber
1050°F Chamber
0850°F Chamber
100
1
2
3
4
5
1200°C Chamber
1100°C Chamber
1000°C Chamber
150
900°C Chamber
125
800°C Chamber
100
75
50
T
0.5
75
100
125
1000
1200
1400
Mean Temperature—°F
1600
1800
2000
Mean Temp. =TInside + TOutside
2
35
30
3
96
25
g/m
15
k
10
er
d Fib
olde
M
tlow
r Wa
e fo
ang
lR
pica
et
nk
Bla
20
600°C Chamber
50
800
r
ed Fibe
ow Mold
for Watl
Insulation K-Factors
700°C Chamber
25
ange
ypical R
1.0
ket
lan
ft3 B
6 lb/
1.5
40
External Surface Temperatures (°C)
175
2.0
6
Thermal Conductivity
W-cm
m2-C
External Temperature—°C
200
Mean Temp. =TInside + TOutside
2
2.5
600
Total Wall Thickness—inches (Includes Standard 2 in. Heater Thickness)
225
Insulation K-Factors
3.0
Ty
5
250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 1050 1100
Mean Temperature—°C
150
Total Wall Thickness—mm (Includes Standard 50 mm Heater Thickness)
Application Hints
For wall thicknesses (T) in cylindrical situations use the
“equivalent thickness” conversion.
rout
Tcyl. = rout loge
rin
(
)
Whererout is outer radius
rin is inner radius
Emissivity of Heater Surface
WATLOW®
Total Normal Emittance
The Emissivity graph details the normalized emittance
values for the four surfaces most likely to be encountered
when planning Watlow ceramic fiber heater applications.
Emissivity Chart
Surface Temperature—°C
1.0
600
700
0.8
0.6
0.4
0.2
0
1000
1200
800
900
1000
1100
High Emissivity Coating
Oxidized Wire
Ceramic Fi
ber Blanke
t
Std. Hot Face
Coating
Unc
oate
d Un
it Su
rfac
es
1400
1600
1800
2000
Surface Temperature—°F
2200
439
High-Temperature Heaters
Ceramic Fiber Heaters
Termination Options
Watlow offers many variations of electric leads to meet
particular wiring requirements. To understand termination
options available, it is necessary to understand the
various methods for applying electrical leads.
Ceramic fiber heater electrical leads are welded to
stubs – the metal parts that interface between the
heating element wire and the add-on electrical leads.
These stubs exit the heater at the lead pockets. Pockets
are small cavities below the cold face plane (outside
surface) and usually located at or near the corners.
Watlow ceramic fiber heaters are equipped with either
strip leads or double twisted wire leads. Strip leads are
most commonly used, unless otherwise specified.
The various lead styles refer to the lead’s exit orientation
relative to the pocket used on a given type of heater. See
illustrations for specific details.
Flat Units
Strip Lead
(add-on)
Stub
Wi
Important
Inspect the carton and its contents for damage prior to
discarding packaging material. If there is any damage,
contact your Watlow representative immediately for a
Returned Material Authorization (RMA) number.
All damaged goods are to be returned in the original
packaging to reduce the possibility of further damage
to the product.
440
thLead
Strip
ngLead
Strip
Le(add-on)
(add-on)
dth
Style A Lead (Type 5)
Pocket
Pocket
Style A (Type 6)
Style A (Type 8)
Cold
Cold
Face
Face
Stub
Stub
W
th
ng
Wi idth
Lgeth
dth
en
Style
B
L
Style A Lead (Type 5)
Style A Lead (Type 5)
Style B (Type 5)
Strip Leads
Flat and semi-cylindrical ceramic fiber heaters are
available with the termination options shown here.
When ordering termination options for catalog units,
the specific strip lead Style must be specified. To
determine the desired style, refer to the following
illustrations. If a style is not specified, Style A leads, 12 in.
(305 mm) in length will be provided. Additional lengths
are available using add-on leads which are priced per
pair, per inch, for the three different widths. See ordering
charts for which lead width is used on a specific heater.
Strip leads are shipped with a 13/64 in. (5 mm) hole at the
end of the lead. Use #10-24 screws, nuts and washers,
or other wiring connections. Caution should be exercised
when making connections. Leads are susceptible to
loosening due to thermal expansion and contraction as
the heater cycles.
Cold
Face
Pocket
Style B (Type 5)
Style B (Type 5)
Style A (Type 8)
Style A (Type 8)
Style B (Type 8)
Style B (Type 6)
Style B (Type 6)
Style C (Type 6)
Style C (Type 5)
Cold
Face
Style A (Type 6)
Style A (Type 6)
(Type 6)
Style B (Type 8)
Style B (Type 8)
Style C (Type 8)
Pocket
Semi-Cylindrical
Units
Style C (Type 5)
Stub
Style
C (Type 5)
Cold
Cold
Face
Pocket
Face
Pocket
Style C (Type 6)
Style C (Type 6)
Style C (Type 8)
Style C (Type 8)
Stub
Stub
Vestibule
Strip Lead
(add-on)
Style A Lead
(Type 1 or 2 Unit)
Style A
(Type 3 or 4)
Style A
Strip Lead
Style 3
A or 4)
Vestibule Strip Lead
(Type
(add-on) (Type
Vestibule
3 or 4)
(add-on)
Style A Lead
Style A
(Type
1 Lead
or 2 Unit)
(Type 1 or 2 Unit)
Style B Lead
(Type 1 or 2)
Style B Lead
Style
B Lead
(Type
1 or
2)
Style
(Type 1 or 2)
Style B
Style 3
B or 4)
(Type
B(Type
3 or 4)
(Type 3 or 4)
WATLOW®
High-Temperature Heaters
Ceramic Fiber Heaters
Termination Options (Continued)
Special Lead Orientation
If the various standard strip lead orientations and pocket
configurations are not suitable, special designs are
available. When ordering, please include drawings that
show proposed locations.
Stub on
Heater
in Pocket
(Typ.)
Leads Bent 90 Degrees
The double twisted leads of full cylinder heaters can bend
90 degrees to lay into slots and exit to the sides of the
unit.
Special Add-On Lead Configurations
The two options illustrated can be welded onto the stub
at the heater pocket, or for a better installation, welded
to the end of a specified length of the regular strip lead.
The strip lead length can vary from zero to the value
necessary to distance it from the hot zone. The length of
the add-on lead option eliminates the need for a custom
product and satisfies a greater range of wiring
requirements. Contact your Watlow representative
for technical details and price.
Flexible
Stranded
MGT Insulated
Nickel Lead Wire
(450°C Rated)
Solid NiCr
Wire
LTotal = LS + LL
Accessories
Ceramic fiber heater orders can include the accessory
items described in this section. Please specify the Watlow
part number when ordering.
Rigidizer
Rigidizer is primarily used to recoat soft, cut edges of
ceramic fiber heaters and ceramic fiber insulation panels.
Various degrees of hardening can be achieved with
additional applications. Rigidizer can be ordered by
the pint (0.47 l) by specifying part number CFRGDPT
or gallon (3.78 l), part number CFRGDGAL.
B.T.E. Closed-End Thermocouple Tubes
A horizontal thermocouple tube between the elements is
available in two sizes: 0.140 in. (3.6 mm) and 0.265 in.
(6.7 mm), both 6 in. (152 mm) long with closed end.
Ceramic Tubes
Ceramic tubes are available in four nominal sizes: 1/8, 1/4,
3/8 and 1/2 in. (3.2, 6, 9.5 and 13 mm) I.D. and lengths
including 0.9 in. (22 mm) and 1.9 in. (48 mm) long.
Ceramic tubes have several uses, including thermocouple
mounting holes, mounting pin sleeves and lead coverings.
The table below lists part numbers and exact sizes.
Inside Diameter in.
(mm)
in.
Length (mm)
Part
Number
0.140 (3.6)
0.265 (6.7)
0.390 (9.9)
0.515(13.1)
0.90
0.90
0.74
0.90
(22)
(22)
(19)
(22)
CC405-1
CC405-2
CC405-3
CC405-9
0.140 (3.6)
0.265 (6.7)
0.390 (9.9)
0.515(13.1)
1.90
1.90
1.60
1.90
(48)
(48)
(41)
(48)
CC405-4
CC405-5
CC405-6
CC405-8
Black Surface Coat
Black high emissivity coating is used to raise emissivity closer
to 1.0. The container size is 4 ounces. Order CFBSC.
WATLOW®
441
High-Temperature Heaters
Ceramic Fiber Heaters
Accessories (Continued)
Dry Heating Surface Mix
Dry heating surface mix is used to make the hot face of all
heaters, including those with the high emissivity coating.
It can also be used with rigidizer to make a very high
temperature paste for touch ups of the hot face area.
Order by the pint (0.47 l), part number CFHTGSURMX,
or gallon (3.78 l), part number CFHTGMXGAL.
High Temperature Coating and Electrical
Potting Cement
To easily repair small breaks or cracks, the patch kit contains
one pint (0.47 L) of powdered ceramic fiber and four ounces
(0.118 L) of black surface coat. Order CFPATCHKIT.
Two different high purity, high temperature cements can be
used to mount thermocouple tubes, provide extra surface
hardening, bond ceramic fiber gaskets and affix lightweight
ceramic fiber insulation blanket to panels, as well as
attach edge-spacer blocks and custom vestibules. Potting
cement is packaged in a 1/4 pint (116 mL) jar, and may be
ordered by specifying part number CFPTGCMT. The high
temperature coating cement is available in pints or
gallons, and can be ordered by using part numbers
CFCTGCMTPT and CFCTGCMTGAL.
Ceramic Fiber Insulation Blanket
Strip Lead Porcelain Bushings
Additional insulation value for ceramic fiber heaters is
available with ceramic fiber insulation blanket. This 6 lb/ft3
(96 kg/m3) ceramic fiber blanket contains no organic binders.
It is suitable for applications up to 2300°F (1260°C) and
sold in full rolls or cut by the square foot. These blankets are
available in the following sizes:
Strip lead porcelain bushings are primarily used to protect
heater power leads when passing through metal walls
and furnace structures. Bushings are available with inside
diameters listed below for use with double twisted leads
and the three standard strip lead widths. To select the
appropriate inside diameter lead bushing, reference the
heater selection tables on pages 449 through 454.
The strip lead width for each heater is listed therein.
Patch Kit
Size (U.S.)
1/4
24 in. X 25 ft X
in.
24 in. X 25 ft X 1/2 in.
24 in. X 25 ft X 1 in.
①
Size (metric)
Part No.
610 mm X 7.6 m X 6 mm
610 mm X 7.6 m X 13 mm
610 mm X 7.6 m X 25 mm
CFBLKT1/4①
CFBLKT1/2①
CFBLKT-1①
Overall O.D. Head
Add ...R to end of part number for full roll.
Overall
Length
Powdered Ceramic Fiber
Shank
Powdered ceramic fiber is used primarily to improve surface
finish in critical areas. It can also be used to fill voids, cracks
and broken corners in damaged units. Use powdered
ceramic fiber with rigidizer to make an easy to apply paste.
A standard container size is one pint (0.47 l).
Order part number CFPDRFPT.
Int.
Ext.
Wire Dia. = (See Table)
Strip Leads Double Twisted
and Flexible Leads
Inside
Outside
Metal Wall
or Shroud
Porcelain Bushings Specifications
Conduit
K.O. Size
in. (mm)
Shank Dia. without Wire Nut
Int.
Ext.
in. (mm)
in. (mm)
Wire Nut
Dia.
in. (mm)
Shank
Length
in. (mm)
Overall
Length
in. (mm)
Overall Head
O.D. (Ref.)
in. (mm)
Use With:
Part
Number
3/8(9.5)3/8(9.5) 21/32(16.7) 0.080(2.032) 9/16(14.3) 7/8(22.2) 7/8
(22.2) All double twist
1/2(13.0) 7/16(11.1) 13/16(20.6) 0.080(2.032) 3/4(19.0)11/8 (28.6) 11/8(28.6)3/8 (9.5 mm) Strip
3/4(19.0) 9/16(14.3)
1 (25.0) 0.106(2.692) 7/8 (22.2)15/16(33.3) 15/16(33.3)1/2 (13.0 mm) Strip
442
CS45-11
CS45-20
CS45-30
WATLOW®
High-Temperature Heaters
Ceramic Fiber Heaters
Mounting Methods
The Watlow ceramic fiber heater is available in a wide
range of heater shapes and configurations to solve high
temperature process applications. The modularity and
range of sizes and wattages provide the greatest possible
flexibility. Watlow has developed and can recommend
many appropriate specific and generalized mounting
systems for mounting heaters. Ceramic fiber heaters have
been organized into seven major mounting categories or
heater system configurations as shown in the following
illustrations.
1. Full Cylinder Heaters
4. Flat Panels, with One Panel on Each Side
5.Flat Wall Array with Minimum
Two-by-Two Units per Wall
2. Semi-Cylindrical (180° section) Heaters
6.Made-to-Order Molded Shapes with up to
Five Sides of a Box Molded as One Piece, Including Complex Curves
3. Arc-Section Arrays of Heaters (3 or more units of 120° or less each)
WATLOW®
443
High-Temperature Heaters
Ceramic Fiber Heaters
Molded Ceramic Fiber Insulation Modules
For heating applications requiring insulation panels,
Watlow offers many shapes and sizes of molded ceramic
fiber insulation modules. These insulation modules
are constructed using the same high quality, high
temperature, low mass ceramic fiber material used
in our heaters.
As a complement to the overall product line, these
modules offer additional solutions for high temperature
industrial insulation problems. Without heating elements,
molded ceramic fiber insulation modules are available in
complex shapes to conform to application requirements.
Molded-to-shape insulation modules also make handling
and installation easier compared to other insulation
methods. Since they are molded to shape, sanding,
cutting and grinding of blocks to achieve the desired
configuration is not required.
Highly resistant to thermal shock and chemical attack,
except for hydrofluoric and phosphoric acids and strong
alkalies, insulation modules are unaffected by oil and
water. If the insulation becomes wet, physical and thermal
properties can be fully restored when dried.
Note: If using molded ceramic fiber insulation modules
along with other Watlow ceramic fiber heaters, oil, water
and other contaminants will negatively affect the heating
element portion of the ceramic fiber heater.
Molded insulation modules are rated for up to 2300°F
(1260°C) continuous duty. The inorganic binder eliminates
smoke or combustion during initial heating to 300°F
(150°C) and higher. Vacuum molded density is
10 to 15 lbs/ft3 (160 to 240 kg/m3), the same as the
ceramic fiber heaters.
Size Limits: Maximum flat size is 34 x 52 in.
(860 x 1320 mm) with a molded thickness of more
than 4 in. (102 mm). Maximum inside diameter for
semi-cylindrical modules is 24 in. (610 mm). For
applications requiring curved insulation pieces in excess
of 180 degrees, consider using multiple arc-section
modules or an array system of multiple flat units.
444
Application and Technical Data
The same insulation performance and technical data for
ceramic fiber heaters applies to molded ceramic fiber
insulation modules. For specific information on insulation
performance properties, see the Heat Loss and Energy
Transfer portion of the ceramic fiber heaters section on
page 439.
Accessories
Where appropriate, many of the same accessories
available for ceramic fiber heaters are available for
use with molded ceramic fiber insulation modules.
Accessories can be used to modify, provide mounting
options and for minor repairs and maintenance.
Ordering Information
Molded ceramic fiber insulation modules are available in
exactly the same sizes and shapes as the ceramic fiber
heaters listed in the ordering tables. In general, the
ordering part numbers are derived by replacing the
second alpha character in the heater part number
(i.e., F, S, C, R, etc.) with N to designate no-element.
Extended Capabilities: Watlow representatives can
work with your customers to design and manufacture
modules to meet specific insulation needs.
WATLOW®
High-Temperature Heaters
Ceramic Fiber Heaters
Molded Ceramic Fiber Insulation Modules
Ordering Information
VN - No-Heat Panels
Part Number
①
②
③
④
⑤
⑧
Base
Code
Nbr.
Base
Code
Nbr.
Base
Code
Nbr.
Base
Code
Nbr.
⑥
Base
Code
Nbr.
⑦
Base
Code
Nbr.
Base
Code
Nbr.
Base
Code
Nbr.
⑨
Base
Code
Nbr.
V
N
5
1
2
A
1
2
A
⑩
⑪
⑫
⑬
⑭
0
0
0
0
Modification
Options
① ② ③ ④ ⑤ ⑥ ⑦⑧ ⑨ Base Code Number
Modification Options
⑩
0=
None
A=
0.430 thermocouple tube I.D. center on unit
B=
0.265 thermocouple tube I.D. center on unit
E=
Black surface coat one side
F=
Black surface coat 0.140 thermocouple tube I.D. center on unit
G=
Black surface coat 0.265 thermocouple tube I.D. center on unit
WATLOW®
445
High-Temperature Heaters
Ceramic Fiber Heaters
Modifications
It is possible to order certain special modifications for
catalog units prior to shipment. Some of these are listed
below, with a brief description.
Beveled and trimmed edges: The unheated edges of
Type 6, 7 and 8 units can be factory modified to provide
in-between overall sizes, and can be angle cut to form
regular polygon shapes around objects. Angles between
zero degrees and 45 degrees can be accommodated.
Black surface coating: Improves the emissivity of
the heater’s hotface. See the graph on page 439 for
emissivity values, contact the factory for pricing adders.
Leads: See page 441 for other “Special Add-On Lead”
configurations.
Thermocouple holes: Ceramic tubes on page 441 are
used to make electrically isolated holes through heaters.
To order, the inside diameter and location must be
specified. A special “behind-the-element” horizontal
thermocouple tube is available to very closely track
element temperature for over-temperature protection and
improved heater life.
Notches or long slots in no-heat areas of
units: Rectangular and semi-circular notches can be cut
into no-heat areas and vestibules on most units. Usually,
a sketch or drawing that specifies exact location must be
included with your order. Fax numbers to send drawings
to are available.
Shortened vestibule lengths: Modified vestibule
lengths require retention of at least 1/2 in. (13 mm) of
insulation for adequate strength or complete removal
(“0” length) to make Type 1 units into left vestibule
(i.e., Type 2) or right vestibule (i.e., Type 3) units.
Lead Times
RAPID SHIP: Same or next working day shipment
is subject to current inventory (contact your Watlow
representative for latest status). No set up charges.
Orders must be placed before 11:00 a.m. CST/CDT,
USA.
RAPID SHIP with modifications: Two-to-three working
days shipment. Nominal set up charges only for specific
modifications, not for the basic heater.
Standard delivery: Shipment is usually within three
weeks. Check with the factory for the latest lead time
status. No set up charges.
Warning
This product contains refractory ceramic
fibers (RCF) which have been identified by the
International Agency for Research on Cancer
(IRAC) as a possible human carcinogen (class 2B). Before
using these products, read the material data safety
sheet (MSDS) which includes the detailed precautionary
measures and handling instructions.
446
WATLOW®
High-Temperature Heaters
Ceramic Fiber Heaters
B
C
A
Full Cylinder
Double-Twisted Leads
Full Cylinder Units
Dimensions, in. (mm)
Heated Area
Overall
Electrical Ratings
I.D. (A) Length (B)
O.D. (C)
Power
Surface in. (mm) in. (mm)
in. (mm)
(Watts)
Loading 1
±1/16 (±1.6) ±1/16 (±1.6)
±1/8 (±3.2)
Volts
±5%
W/in2 (W/cm2) Lead Width
1/2
Approx. Net Wt.
oz
(kg)
Delivery
Part
Number 2
3
/4 3
/4 1
1
11/4 11/4 (13)
6
(13)12
(19)
6
(19)12
(25)
6
(25)12
(32)
6
(32) 12
(152)
(305)
(152)
(305)
(152)
(305)
(152)
(305)
2 (51)
60
2(51) 120
3 (76)
60
3(76) 120
3 (76) C 60
3(76) 120
31/2 (89) 60 31/2(89) 120
175
18.6 (2.9)
350 18.6(2.9)
200
14.2
(2.2)
B
400 14.2(2.2)
220
11.7 (1.8)
440
A 11.7(1.8)
Cylinder(1.8)
275 Full11.7
Double
Double-Twisted Leads
550 11.7 (1.8)
Twisted
5 (0.14)
10(0.28)
8 (0.23)
13(0.37)
9 (0.26)
13(0.37)
11C (0.31)
18(0.51)
RS
VC400J06A
RS
VC400J12A
RS
VC400N06A
RS
VC400N12A
RS
VC401A06A
RS B VC401A12A
Full Cylinders
RS
VC401E06A
(“Round
Radiants”)
A Leads Illustrated
RS Style VC401E12A
11/2 11/2 13/4 13/4 (38)
6
(38) 12
(45)
6
(45)12
(152)
(305)
(152)
(305)
31/2(89) 60
31/2(89) 120
4 (102)
120
4(102) 120
300
600
350
700
12(0.34)
20(0.57)
12 (0.34)
23(0.65)
RS
RS
RS
RS
13 (0.37)
25(0.71)
RS
RS
1/2
2
(51)
6
(152)
4 (102)
120
2 (51)12 (305) 4(102) 120
10.6 (1.6)
Leads
10.6 (1.6)
10.6 (1.6)
10.6(1.6)
425
11.3 (1.8)
850 11.3(1.8)
A
B
C
(Default Lead Style)
VC401J06A
VC401J12A
VC401N06A
VC401N12A
VC402A06A
VC402A12A
B
Full Cylinders
(“Round Radiants”)
Style A Leads Illustrated
(Default Lead Style)
A
C
A
Full Cylinders
(“Round Radiants”)
Style B Leads Illustrated
Full Cylinder Units
Dimensions, in. (mm)
Heated Area
Overall
Electrical Ratings
I.D. (A) Length (B)
O.D. (C)
Power
Surface Approx. in. (mm) in. (mm)
in. (mm)
(Watts)
Loading 1
Lead Width
Net Wt.
1
1
±
±1/8 (±3.2)
Volts
±5%
W/in2 (W/cm2) in. (mm)
lbs
(kg)
Delivery
/16 (±1.6) ± /16 (±1.6)
3/8 3
(76)
6
(152)
7 (178)
120
650
11.5 (1.8)
(10)
2.5 (1.1)
RS
1/2 (13)
4
(102)
6
(152)
8 (203)
120
900
11.9 (1.8)
3.1(1.4)
RS
3/8 (10)
4
(102)
6
(152)
8 (203)
120
1100
14.6 (2.3)
3.1(1.4)
RS
1/2 (13)
5
(127)
6
(152)
9 (229)
120
1250
13.7 (2.1)
3.5(1.6)
RS
3/8 (10)
5
(127)
6
(152)
9 (229)
120
1400
14.9 (2.3)
3.6(1.6)
RS
61/2
(165)
6
(152)
101/2(267) 120
1500 12.2 (1.9) 3/4 (19) 4.9(2.2)
RS
61/2
(165)
6
(152)
101/2(267) 120
2000 16.3 (2.5) 1/2 (13) 4.9(2.2)
RS
3/4 (19)
8
(203)
6
(152)
12 (305)
120
1800
11.9 (1.8)
5.7(2.6)
RS
3/4 (19)
8
(203)
6
(152)
12 (305)
120
2600
17.2 (2.7)
5.8(2.6)
RS
RAPID SHIP
•RS - Next day shipment up to 2 pieces for orders with part number
configuration -0000R or 0001R.
Part
Number 2
VC403A06A
VC404A06A
VC404A06T
VC405A06A
VC405A06T
VC406J06A
VC406J06T
VC408A06A
VC408A06T
•All modifications to RAPID SHIP are manufacturing lead times.
1 Units with part numbers ending in ...0A, watt densities between 10.6 to 14.2 W/in2 (1.6 to 2.2 W/cm2), are coil designs suitable for use up to
2000°F (1093°C) maximum surface temperature. Units with part numbers ending in ...T, watt densities between 14.6 to 17.2 W/in2
(2.3 to 2.7 W/cm2 ) are “round radiants” with sinuated element designs and high emissivity coating that are suitable for use up to 1800°F (982°C)
maximum surface temperature.
2
For unheated insulation tubes, substitute “VN” for “VC” in the part number of the appropriate size unit. No heats are manufacturing lead times.
WATLOW®
447
C
High-Temperature Heaters
Ceramic Fiber Heaters
Ordering Information
VC - Full Cylindrical
Part Number
①
Base
Code
Nbr.
②
Base
Code
Nbr.
③
Base
Code
Nbr.
④
Base
Code
Nbr.
⑤
Base
Code
Nbr.
⑥
Base
Code
Nbr.
⑦
Base
Code
Nbr.
⑧
Base
Code
Nbr.
⑨
Base
Code
Nbr.
V
C
4
0
5
A
0
6
A
① ② ③ ④ ⑤ ⑥ ⑦⑧ ⑨ Base Code Number
⑩
Modification Options
⑩
⑪
⑫
⑭
Lead
Lead
Options Length
Modification
Options
0
⑭
⑬
0
Lead Length
A=
0 in.
T=
14 in.
B=
1 in.
U=
15 in.
E=
2 in.
V=
16 in.
0=
None
A=
0.140 thermocouple tube I.D. opposite leads, centered on
height
F=
3 in.
W=
17 in.
B=
0.140 thermocouple tube I.D. lead side, centered on height
G=
4 in.
X=
18 in.
E=
Black surface coat
H=
5 in.
Y=
19 in.
J=
6 in.
1=
20 in.
F=
Black surface coat 0.140 thermocouple tube I.D. opposite leads,
centered on height
K=
7 in.
2=
21 in.
L=
8 in.
3=
22 in.
Black surface coat 0.140 thermocouple tube I.D. lead side,
centered on height
M=
9 in.
4=
23 in.
N=
10 in.
6=
24 in.
Lead Options
P=
11 in.
7=
30 in.
R=
12 in.
8=
36 in.
S=
13 in.
9=
42 in.
G=
⑬
0=
Fixed (built-in) standard double-twisted
1=
601 Alloy 600 strip A style
2=
601 Alloy 600 strip B style
9=
Flex NI, MGT A style
A=
Flex NI, MGT B style
E=
Chromel® A / NI, A style
F=
Chromel® A / NI, B style
Notes:
•If the order is placed before 11:00 AM CST, heaters with standard leads (...0R) ship the same day. Heaters with non-standard leads
ship the next day.
•The BTE (between-the-element) is NOT covered in this system yet. Please contact your Watlow representative for availability.
448
WATLOW®
High-Temperature Heaters
Ceramic Fiber Heaters
A
All units: T =
2 ±1⁄4 inches
(51 ±6 mm)
T
A
C
A
L
B
B
B
T
T
Type 5
Fully Heated
(Style A Leads Illustrated)
(Default Lead Style)
A
Type 6
Insulated Sides
(Style B Leads Illustrated)
C
B
L
T
Type 7
Insulated Ends
(Style C Leads Illustrated)
Type 8
Insulated All Edges
(Style C Leads Illustrated)
(Style A, B or C leads available on any type unit. Please specify.)
Flat Units — Embedded Coiled Elements (see page 435)
Dimensions, in. (mm)
Heated Size
Type 6 & 8 Type 7 & 8
Electrical Rating
Strip
Approximate Net Wt.
Width (A)
Length (B)
Width (C) Length (L)
Power Surface
Lead
Type
Type
Type
in. (mm)
in. (mm)
in. (mm)
in. (mm)
(Watts) Loading
Width
5
6 & 7
8
+1/16 -1/8 (1.6-3.2) +1/16 -1/8 (1.6-3.2) +1/16 -1/8 (1.6-3.2)+1/16 - 1/8 (1.6-3.2)Volts ±5%W/in2 (W/cm2) in. (mm) lbs (kg) lbs (kg) lbs (kg) Delivery
4(102)
6(152)
8(203)
10(254)
12(305)
14(356)
16(406)
6(152)
12(305)
18(457)
24(610)
6(152)
12(305)
18(457)
24(610)
30(762)
36(914)
12(305)
18(457)
24(610)
30(762)
36(914)
12(305)
18(457)
24(610)
30(762)
36(914)
12(305)
18(457)
24(610)
30(762)
36(914)
12(305)
18(457)
24(610)
30(762)
36(914)
12(305)
18(457)
24(610)
30(762)
36(914)
8(203)
8(203)
8(203)
8(203)
10(254)
10(254)
10(254)
10(254)
10(254)
10(254)
12(305)
12(305)
12(305)
12(305)
12(305)
14(356)
14(356)
14(356)
14(356)
14(356)
16(406)
16(406)
16(406)
16(406)
16(406)
18(457)
18(457)
18(457)
18(457)
18(457)
20(508)
20(508)
20(508)
20(508)
20(508)
RAPID
SHIP
•RS - Next day shipment up to 2 pieces 10 (254) 60 27511.5
16 (406) 60 55011.5
22 (559) 120 75010.4
28 (711) 120110011.5
10 (254) 60 37510.4
16 (406) 120 75010.4
22 (559) 120125011.6
28 (711) 240150010.4
34 (864) 240200011.2
40(1016) 240250011.6
16 (406) 120110011.5
22 (559) 240150010.4
28 (711) 240220011.5
34 (864) 240250010.4
40(1016) 240300010.4
16 (406) 240125010.4
22 (559) 240180010.0
28 (711) 240250010.4
34 (864) 240300010.0
40(1016) 240360010.0
16 (406) 240150010.4
22 (559) 240220010.2
28 (711) 240300010.4
34 (864) 240360010.0
40(1016) 240440010.2
16 (406) 240175010.4
22 (559) 240255010.6
28 (711) 240350010.4
34 (864) 240430010.2
40(1016)
240/240
520010.3
16 (406) 240210010.9
22 (559) 240300010.4
28 (711) 240420010.9
34 (864)
240/240
500010.4
40(1016)
240/240
600010.4
RS
RS
M
RS
RS
RS
RS
RS
M
M
RS
M
RS
M
M
RS
RS
M
M
M
RS
M
RS
M
M
M
M
M
M
M
M
M
M
M
M
VFa04A06S
VFa04A12S
VFa04A18S
VFa04A24S
VFa06A06S
VFa06A12S
VFa06A18S
VFa06A24S
VFa06A30S
VFa06A36S
VFa08A12S
VFa08A18S
VFa08A24S
VFa08A30S
VFa08A36S
VFa10A12S
VFa10A18S
VFa10A24S
VFa10A30S
VFa10A36S
VFa12A12S
VFa12A18S
VFa12A24S
VFa12A30S
VFa12A36S
VFa14A12S
VFa14A18S
VFa14A24S
VFa14A30S
VFa14A36Sb
VFa16A12S
VFa16A18S
VFa16A24S
VFa16A30Sb
VFa16A36Sb
All units in this table are suitable for use up to 2000°F (1093°C) maximum surface temperature.
1Add Type number (Type 5 - 8) in the blank position in the part number. Example: VS704A06S.
For unheated units, see catalog page 444.
2
These units have dual elements to use in “parallel” for 240V usage. Alternate designs are available
for 480V, 277V and three-phase (internally wired). Contact your Watlow representative.
for orders with part number
configuration -0001R.
•All modifications to RAPID SHIP are manufacturing lead times. •M - Manufacturing lead times
WATLOW®
(1.8)3/8 (10) 0.6
(0.5) 1.7(0.8)
(0.3) 1.1
(1.8)1/2 (13) 1.2
(1.0) 2.8(1.3)
(0.5) 2.2
(1.6)3/8 (10) 1.9(0.9) 3.4
(1.5) 4.5 (2.0)
(1.8)1/2 (13) 2.4
(2.0) 5.6(2.5)
(1.1) 4.4
(1.6)3/8 (10) 0.9
(0.7) 2.4(1.1)
(0.4) 1.5
(1.6)3/8 (10) 1.8
(1.3) 3.7(1.7)
(0.8) 2.8
(1.8)1/2 (13) 3.0
(1.9) 5.0(2.3)
(1.4) 4.1
(1.6)3/8 (10) 3.5
(2.4) 6.2(2.8)
(1.6) 5.3
(1.7)1/2 (13) 4.5
(3.0) 8.4(3.8)
(2.0) 6.6
(1.8)1/2 (13) 6.18.3
(3.8) 10.2 (4.6)
(2.8)
(1.8)1/2(13)2.5
(1.5) 4.1 (1.9)
(1.1) 3.2
(1.6)3/8(10)3.6
(2.1) 5.6 (2.5)
(1.6) 4.7
(1.8)1/2(13)4.8
(2.9) 7.4 (3.4)
(2.2) 6.5
(1.6)1/2(13)6.2
(3.6) 9.7 (4.4)
(2.8) 8.0
(1.6)3/4(19)7.8
(4.5) 11.8 (5.4)
(3.5) 10.0
(1.6)3/8(10)2.6
(1.8) 5.0 (2.3)
(1.2) 3.9
(1.6)1/2(13)4.2
(2.4) 6.5 (2.9)
(1.9) 5.4
(1.6)1/2(13)5.2
(3.5) 8.8 (4.0)
(2.4) 7.7
(1.6)3/4(19)7.0
(4.3) 11.7 (5.3)
(3.2) 9.5
(1.6)3/4(19)9.1
(5.2) 13.7 (6.2)
(4.1) 11.5
(1.6)3/8(10)3.2
(2.1) 5.8 (2.6)
(1.5) 4.6
(1.6)1/2(13)4.9
(2.9) 7.7 (3.5)
(2.2) 6.5
(1.6)3/4(19)7.5
(4.3) 10.7 (4.9)
(3.4) 9.5
(1.6)3/4(19)9.1
(5.3) 12.9 (5.9)
(4.1) 11.7
(1.6)3/4 (19)12.4
(7.0) 16.7 (7.6)
(5.6) 15.5
(1.6)1/2(13)4.7
(2.8) 7.6 (3.4)
(2.1) 6.1
(1.6)1/2(13)6.8
(3.9) 10.0 (4.5)
(3.1) 8.5
(1.6)3/4 (19)10.0
(5.4) 13.4 (6.1)
(4.5) 11.9
(1.6)3/4 (19)12.5
(6.8) 16.5 (7.5)
(5.7) 15.0
(1.6)1/2 (13)14.2
(7.8) 18.7(8.5)
(6.4) 17.2
(1.7)1/2(13)5.2
(3.0) 8.4 (3.8)
(2.4) 6.7
(1.6)3/4(19)8.2
(4.5) 11.6 (5.3)
(3.7) 9.9
(1.7)3/4 (19)11.9
(6.3) 15.5 (7.0)
(5.4) 13.8
(1.6)1/2 (13)15.2
(8.0) 19.4 (8.8)
(6.9) 17.7
(1.6)3/4 (19)17.9
(9.5) 22.6(10.3)
(8.1) 20.9
Part
Number
449
High-Temperature Heaters
Ceramic Fiber Heaters
C
C
C
D
C
E
E
B
L B
B
A
A
D
B
A
D
A
E
E
Type 1
Full Vestibule
(Style A Leads Illustrated)
(Default Lead Style)
Type 2
Left Vestibule
(Style B Leads Illustrated)
Type 3
Right Vestibule
(Style A Leads Illustrated)
Type 4
No Vestibule
(Style B Leads Illustrated)
(Style A or B leads available on any type unit. Please specify.)
Semi-Cylindrical Units — Embedded Coiled Elements (see page 435)
Dimensions, in. (mm)
Heated Size
Type 1, 2, & 3 Sizes
Electrical Ratings
Approx. Net Wt.
Vestibule Sizes
I.D. (A) Length (B) O.D. (C) Length (L) Dia. (D) Length (E)
Power Surface
Strip
Type 1 Type 4
in. (mm) in. (mm) in. (mm) in. (mm)
in. (mm) in. (mm)
(Watts) Loading
Lead
Full
No
2
2
1
1
1
1
1
1
1
1
± /8 (+3.2)+ /16 - /8
(Ref) + /16 - /8 ± /8 (+3.2) + /16 - /8
±5%
W/in (W/cm ) Width
Vest.
Vest.
(+1.6 - 3.2)
(+1.6 - 3.2)
(+1.6 - 3.2) Volts
in. (mm) lbs (kg) lbs (kg) Delivery
(10)
(0.5)
2
(51) 6 (152) 6 (152) 8 (203) 1
(25) 1 (25)
60
275 14.6 (2.3) 3/81.1
(0.5) 1.1
(10)
(0.8)
12 (305) 6 (152) 14 (356) 1
(25) 1 (25) 120
550 14.6 (2.3) 3/81.8
(0.8) 1.8
(10)
(1.0)
18 (457) 6 (152) 20 (508) 1
(25) 1 (25) 120
750 13.3 (2.1) 3/82.3
(1.0) 2.3
24 (610) 6 (152) 26 (660) 1
(25) 1 (25) 240 1100 14.6 (2.3) 3/8 (10) 3.5 (1.6) 3.5(1.6)
(13)
(0.7)
31/2 (89) 6 (152) 71/2 (191) 91/2 (241)2 (51) 13/4 (45)
60
450 13.6 (2.1) 1/22.0
(0.9) 1.5
1
1
3
(13)
(1.2)
12 (305) 7 /2 (191) 15 /2 (394) 2 (51)1 /4 (45) 120
900 13.6 (2.1) 1/23.1
(1.4) 2.6
(13)
(1.8)
18 (457) 71/2(191) 211/2(546)2 (51) 13/4 (45) 120 1250 12.6 (2.0) 1/24.5
(2.0) 4.0
(13)
(2.2)
24 (610) 71/2(191) 271/2 (699)2 (51) 13/4 (45) 240 1800 13.6 (2.1) 1/25.4
(2.4) 4.9
(13)
(1.1)
5 (127) 6 (152) 9 (229) 11 (279) 31/2(89) 21/2(64) 60 625 13.3 (2.1) 1/23.4
(1.5) 2.5
(13)
(1.8)
12 (305) 9 (229) 17 (432) 31/2(89) 21/2(64) 120 1250 13.3 (2.1) 1/24.9
(2.2) 4.0
(13)
(2.2)
18 (457) 9 (229) 23 (584) 31/2(89) 21/2 (64) 2401775 12.6(2.0)1/25.7
(2.6) 4.8
(13)
(3.1)
24 (610) 9 (229) 29 (737) 31/2(89) 21/2 (64) 2402500 13.3(2.1)1/27.9
(3.6) 6.9
30 (762) 9 (229) 35 (889) 31/2(89) 21/2(64) 240 3100 13.2 (2.0) 3/4 (19) 10.9 (4.9) 9.2(4.2)
36 (914) 9 (229) 41 (1041) 31/2(89) 21/2(64) 240 3550 12.6 (2.0) 3/4 (19) 13.2 (6.0) 11.5(5.2)
(10)
(1.2)
61/2(165) 6 (152) 101/2(267) 12 (305) 5 (127) 3 (76) 120
750 12.2 (1.9) 3/83.8
(1.7) 2.6
(10)
(1.9)
12 (305) 101/2(267) 18 (457) 5 (127) 3 (76) 240 1500 12.2 (1.9) 3/85.4
(2.4) 4.2
18 (457)101/2(267)24 (610)5 (127)3 (76) 2402100 11.4(1.8) 1/2 (13) 7.5 (3.4) 6.2(2.8)
24 (610)101/2(267)30 (762)5 (127)3 (76) 2403000 12.2 (1.9) 3/4 (19) 10.9 (4.9) 8.9(4.0)
30 (762)101/2(267)36 (914)5 (127)3 (76) 2403750 12.2 (1.9) 3/413.5
(19)
(5.2)
(6.1) 11.4
36 (914)101/2(267)42 (1067)5 (127)3 (76) 2404200 11.4(1.8) 3/416.4
(19)
(6.5)
(7.4) 14.3
8 (203) 6 (152)12 (305)12 (305)61/2 (165)3 (76)120 90011.6(1.8) 1/25.0
(13)
(1.3)
(2.3) 2.8
12 (305)12 (305)18 (457)61/2 (165)3 (76) 2401800 11.6 (1.8) 1/27.6
(13)
(2.3)
(3.4) 5.0
18 (457)12 (305)24 (610)61/2 (165)3 (76) 2402500 11.1 (1.7) 1/210.5
(13)
(3.7)
(4.8) 8.1
24 (610)12 (305)30 (762)61/2 (165)3 (76) 2403500 11.6 (1.8) 3/413.9
(19)
(5.6)
(6.3) 12.4
30 (762)12 (305)36 (914)61/2 (165)3 (76) 2404200 11.1 (1.7) 3/416.6
(19)
(6.4)
(7.5) 14.1
36 (914)12 (305)42 (1067)61/2 (165)3 (76) 240/2405000 11.1 (1.7) 1/218.0
(13)
(7.1)
(8.2) 15.6
Part
Number
RS
VSa02A06S
RS
VSa02A12S
RS
VSa02A18S
RS VSa02A24S
RS
VSa03J06S
RS
VSa03J12S
RS
VSa03J18S
RS
VSa03J24S
RS
VSa05A06S
RS
VSa05A12S
RS
VSa05A18S
RS
VSa05A24S
RS VSa05A30S
M
VSa05A36S
RS
VSa06J06S
RS
VSa06J12S
RS VSa06J18S
RS VSa06J24S
M
VSa06J30S
M
VSa06J36S
M
VSa08A06S
RS VSa08A12S
RS VSa08A18S
M
VSa08A24S
M
VSa08A30S
M
VSa08A36Sb
CONTINUED
RAPID
SHIP
•RS - Next day shipment up to
2 pieces for orders with
part number configuration -0001R.
•All modifications to RAPID SHIP are manufacturing lead times.
•M - Manufacturing lead times
450
All units have 2 ±1/4 inch thick walls.
All units in this table are suitable for use up to 2000°F (1093°C) maximum surface temperature.
1 Add Type number (Type 1 - 4) in the blank position in the part number. Example: VS102A06S.
For unheated units, see catalog page 444.
Overall length applies only to the full vestibule (Type 1) units. Types 2 and 3 are shorter by
one vestibule length. Type 4 length equals (B).
Type 2 (left vestibule) and Type 3 (right vestibule) style units are not stocked. They are,
however, still standard units and designs are kept on file.
2
These units have dual elements to use in “parallel” for 240V usage. Alternate designs are available
for 480V, 277V and three-phase (internally wired). Contact your Watlow representative.
WATLOW®
High-Temperature Heaters
Ceramic Fiber Heaters
C
C
C
D
C
E
E
B
L B
B
A
A
D
B
A
D
A
E
E
Type 1
Full Vestibule
(Style A Leads Illustrated)
(Default Lead Style)
Type 2
Left Vestibule
(Style B Leads Illustrated)
Type 3
Right Vestibule
(Style A Leads Illustrated)
Type 4
No Vestibule
(Style B Leads Illustrated)
(Style A or B leads available on any type unit. Please specify.)
Semi-Cylindrical Units — Embedded Coiled Elements (see page 435)
Dimensions, in. (mm)
Heated Size
Type 1, 2, & 3 Sizes
Electrical Ratings
Approx. Net Wt.
Vestibule Sizes
I.D. (A) Length (B) O.D. (C) Length (L) Dia. (D) Length (E)
Power Surface
Strip
Type 1 Type 4
in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in. (mm)
(Watts) Loading
Lead
Full
No
±1/8 (+3.2)+1/16 -1/8
(Ref)+1/16 -1/8 ±1/8 (+3.2) +1/16 -1/8 ±5% W/in2 (W/cm2) Width Vest.
Vest.
(+1.6 - 3.2)
(+1.6 - 3.2)
(+1.6 - 3.2) Volts
in. (mm) lbs (kg) lbs (kg) Delivery
10 (254)12 (305)14 (356)18
18 (457)14 (356)24
24 (610)14 (356)30
30 (762)14 (356)36
36 (914)14 (356)42
12 (305)12 (305)16(406)18
18 (457)16 (406)24
24 (610)16 (406)30
30 (762)16 (406)36
36 (914)16 (406)42
14 (356)12 (305)18 (457)18
18 (457)18 (457)24
24 (610)18 (457)30
30 (762)18 (457)36
36 (914)18 (457)42
16 (406)12 (305)20 (508)18
18 (457)20 (508)24
24 (610)20 (508)30
30 (762)20 (508)36
36 (914)20 (508)42
RAPID
SHIP
•RS - Next day shipment up to
2 pieces for orders with
part number configuration -0001R.
•All modifications to RAPID SHIP are manufacturing lead times.
•M - Manufacturing lead times
WATLOW®
(457) 18 (203)3
(610) 18 (203)3
(762) 18 (203)3
(914) 18 (203)3
(1067) 18 (203)3
(457)10 (254)3
(610)10 (254)3
(762)10 (254)3
(914)10 (254)3
(1067)10 (254)3
(457)12 (305)3
(610)12 (305)3
(762)12 (305)3
(914)12 (305)3
(1067)12 (305)3
(457)14 (356)3
(610)14 (356)3
(762)14 (356)3
(914)14 (356)3
(1067)14 (356)3
(4.2)
(2.9)
(13)
(76) 240 210011.1(1.7) 1/29.26.5
(6.0)
(4.8)
(19)
(76) 240 300010.6(1.6) 3/413.310.6
(7.0)
(5.8)
(19)
(76) 240 420011.1(1.7) 3/415.512.8
(8.5)
(7.0)
(13)
(76)240/2405000 10.6 (1.6) 1/218.715.4
(10.3)
(8.8)
(19)
(76)240/2406000 10.6 (1.6) 3/422.619.3
(3.1)
(76) 240 250011.1(1.7) 1/2 (13) 9.9(4.5) 6.8
(5.9) 9.9
(4.5)
(19)
(76) 240 350010.3(1.6) 3/413.0
(8.4)
(7.0)
(19)
(76) 240 42009.3
(1.4) 3/418.515.4
(10.2)
(8.4)
(19)
(76)240/2406000 10.6(1.6) 3/422.518.6
(12.2)
(10.5)
(19)
(76)240/2407000 10.3 (1.6) 3/426.923.1
(5.7) 9.0
(4.1)
(19)
(76) 240 300011.4(1.8) 3/412.6
(6.9)
(5.3)
(19)
(76) 240 420010.6(1.6) 3/415.311.7
(8.5)
(6.9)
(19)
(76)240/2406000 11.4 (1.8) 3/418.815.2
(12.1)
(10.1)
(19)
(76)240/2407000 10.6 (1.6) 3/426.722.2
(14.4)
(12.4)
(19)
(76)240/2408400 10.6 (1.6) 3/431.827.3
(6.4)
(4.6)
(19)
(76) 240 350011.6(1.8) 3/414.010.2
(7.7)
(5.9)
(19)
(76) 240 42009.3
(1.4) 3/416.913.1
(9.4)
(7.7)
(19)
(76)240/2407000 11.6 (1.8) 3/420.817.0
(13.7)
(11.0)
(19)
(76)240/2407600 10.1 (1.6) 3/430.124.2
(15.6)
(12.9)
(19)
(76)240/2409000 9.9 (1.5) 3/434.428.5
Part
Number
M
VSa10A12S
MVSa10A18S
MVSa10A24S
MVSa10A30Sb
MVSa10A36Sb
VSa12A12S
RS
VSa12A18S
RS
VSa12A24S
RS
MVSa12A30Sb
MVSa12A36Sb
MVSa14A12S
MVSa14A18S
MVSa14A24Sb
MVSa14A30Sb
MVSa14A36Sb
MVSa16A12S
MVSa16A18S
MVSa16A24Sb
MVSa16A30Sb
MVSa16A36Sb
All units in this table have 2 ±1/4 inch thick walls.
All units in this table are suitable for use up to 2000°F (1093°C) maximum surface temperature.
1 Add Type number (Type 1 - 4) in the blank position in the part number. Example: VS102A06S.
For unheated units, see catalog page 444.
Overall length applies only to the full vestibule (Type 1) Units. Types 2 and 3 are shorter by
one vestibule length. Type 4 length equals (B).
Type 2 (left vestibule) and Type 3 (right vestibule) style units are not stocked. They are, however,
still standard units and designs are kept on file.
2
These units have dual elements to use in “parallel” for 240V usage. Alternate designs are
available for 480V, 277V and three-phase (internally wired). Contact your Watlow representative.
451
High-Temperature Heaters
Ceramic Fiber Heaters
A
All units: T =
2 ±1⁄4 inches
(51 ±6 mm)
T
A
C
A
T
Type 6
Insulated Sides
(Style B Leads Illustrated)
Type 5
Fully Heated
(Style A Leads Illustrated)
(Default Lead Style)
B
L
B
B
A
T
C
B
L
T
Type 7
Insulated Ends
(Style C Leads Illustrated)
Type 8
Insulated All Edges
(Style C Leads Illustrated)
(Style A, B or C leads available on any type unit. Please specify.)
Flat Units—High Watt Density Sinuated Elements (see page 434)
Dimensions, in. (mm)
Heated Size
Type 6 & 8
Type 7 & 8
Electrical Rating
Strip
Approximate Net Wt.
Width (A)
Length (B)
Width (C)
Length (L) Power Surface
Lead
Type
Type
Type
in. (mm)
in. (mm)
in. (mm)
in. (mm) (Watts) Loading Width
5
6 & 7
8
2
2
1
1
1
1
1
1
1
1
+ /16 - /8 (1.6-3.2) + /16 - /8 (1.6-3.2) + /16 - /8 (1.6-3.2) + /16 - /8 (1.6-3.2)Volts±5%W/in (W/cm )in. (mm) lbs (kg) lbs (kg) lbs (kg) Delivery
6 (152) 12
18
24
24
30
36
8 (203)12
18
24
30
36
10
(254) 12
18
24
30
36
12
(305) 12
12
18
24
30
36
14
(356) 12
18
24
30
36
16
(406) 12
18
24
30
36
(305)
(457)
(610)
(610)
(762)
(914)
(305)
(457)
(610)
(762)
(914)
(305)
(457)
(610)
(762)
(914)
(305)
(305)
(457)
(610)
(762)
(914)
(305)
(457)
(610)
(762)
(914)
(305)
(457)
(610)
(762)
(914)
10
10
10
10
10
10
12
12
12
12
12
14
14
14
14
14
16
16
16
16
16
16
18
18
18
18
18
20
20
20
20
20
•M - Manufacturing lead times
452
(254)
(254)
(254)
(254)
(254)
(254)
(305)
(305)
(305)
(305)
(305)
(356)
(356)
(356)
(356)
(356)
(406)
(406)
(406)
(406)
(406)
(406)
(457)
(457)
(457)
(457)
(457)
(508)
(508)
(508)
(508)
(508)
16
22
28
28
34
40
16
22
28
34
40
16
22
28
34
40
16
16
22
28
34
40
16
22
28
34
40
16
22
28
34
40
(406) 60
1250 17.4 (2.7)
(559) 120 200018.5(2.9)
(711) 120 250017.4(2.7)
(711) 240 250017.4(2.7)
(864) 240 340018.9(2.9)
(1016) 240 400018.5(2.9)
(406) 60 180018.7(2.9)
(559) 120 300020.8(3.2)
(711) 120 360018.7(2.9)
(864) 240 500020.8(3.2)
(1016) 240 600020.8(3.2)
(406) 120
2000 16.7 (2.6)
(559) 120 360020.0(3.1)
(711) 240 450017.9(2.8)
(864) 240 600020.0(3.1)
(1016) 240 720020.0(3.1)
(406) 120
2500 17.4 (2.7)
(406) 240 250017.4(2.7)
(559) 240 400018.5(2.9)
(711) 240 600020.8(3.2)
(864) 240 720020.0(3.1)
(1016)240/240 840019.4(3.0)
(406) 120
3500 20.8 (3.2)
(559) 240 490019.4(3.0)
(711) 240 700020.8(3.2)
(864)240/240 840020.0(3.1)
(1016)240/240 980019.4(3.0)
(406) 120
3550 18.5 (2.9)
(559) 240 575020.0(3.1)
(711) 240 710018.5(2.9)
(864)240/240 960020.0(3.1)
(1016) 240/24011,500 20.0 (3.1)
1/2
(13) 1.7 (0.8) 2.7 (1.6)
1/2 (13) 2.6 (1.2) 3.7 (2.1)
1/2 (13) 3.2(1.5) 5.0(2.7)
1/2 (13) 3.2(1.5) 5.0(2.7)
1/2 (13) 4.5(2.0) 7.1(3.6)
1/2 (13) 5.5(2.5) 8.5(4.2)
3/4 (19) 2.3 (1.0) 3.0(1.8)
3/4 (19) 3.5(1.6) 4.6(2.5)
3/4 (19) 4.4(2.0) 6.1(3.2)
1/2 (13) 6.1(2.8) 8.7(4.4)
3/4 (19) 7.0 (3.2)10.0(5.0)
1/2 (13) 2.4(1.1) 3.7(2.2)
3/4 (19) 4.0(1.8) 5.2(2.9)
3/4 (19) 4.7(2.1) 7.2(3.8)
3/4 (19) 6.7(3.0) 9.3(4.8)
3/4 (19) 8.5 (3.9)11.5(5.8)
1/2 (13) 2.9(1.3) 4.3(2.5)
3/8 (10) 2.9(1.3) 4.3(2.5)
1/2 (13) 4.5(2.0) 6.1(3.3)
3/4 (19) 6.6(3.0) 8.6(4.4)
3/4 (19) 8.6 (3.9)11.2(5.7)
3/4 (19) 10.2 (4.6)13.2(6.6)
3/4 (19) 4.2(1.9) 5.3(3.0)
1/2 (13) 6.1 (2.8) 7.6(4.1)
3/4 (19) 8.5 (3.9)10.5(5.4)
3/4 (19) 10.7 (4.9)13.2(6.6)
1/2 (13) 12.2 (5.5)15.2(7.5)
3/4 (19) 4.7(2.1) 5.7(3.4)
3/4 (19) 7.1(3.2) 8.6(4.7)
3/4 (19) 9.5 (4.3)11.5(6.0)
1/2 (13) 11.7 (5.3)14.2(7.2)
3/4 (19) 14.2 (6.4)17.2(8.6)
3.6 (1.2)
4.6 (1.7)
5.9 (2.3)
5.9 (2.3)
7.9 (3.2)
9.3 (3.9)
3.9 (1.4)
5.5 (2.1)
7.0 (2.8)
9.7 (4.0)
11.0 (4.5)
4.8 (1.7)
6.3 (2.4)
8.3 (3.3)
10.5 (4.2)
12.7 (5.2)
5.5 (2.0)
5.5 (2.0)
7.3 (2.8)
9.8 (3.9)
12.6 (5.1)
14.6 (6.0)
6.7 (2.4)
9.1 (3.4)
11.9 (4.8)
14.6 (6.0)
16.6 (6.9)
7.4 (2.6)
10.3 (3.9)
13.2 (5.2)
15.9 (6.4)
18.9 (7.8)
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
Part No.
VFa06A12T
VFa06A18T
VFa06A24T
VFa06A24U
VFa06A30T
VFa06A36T
VFa08A12T
VFa08A18T
VFa08A24T
VFa08A30T
VFa08A36T
VFa10A12T
VFa10A18T
VFa10A24T
VFa10A30T
VFa10A36T
VFa12A12T
VFa12A12U
VFa12A18T
VFa12A24T
VFa12A30T
VFa12A36Tb
VFa14A12T
VFa14A18T
VFa14A24T
VFa14A30Tb
VFa14A36Tb
VFa16A12T
VFa16A18T
VFa16A24T
VFa16A30Tb
VFa16A36Tb
All units in this table are suitable for use up to 1800°F (982°C) maximum surface temperature.
1 Add Type number (Type 5 - 8) in the blank position in the part number. Example: VF806A12T. For unheated
units, see catalog page 444.
Sinuated wire, high watt density units are provided with embedded sinuated elements and high emissivity
coating unless exposed sinuated is specified when manufactured. (These are not stocked.) Contact your Watlow representative.
2
These units have dual elements to use in “parallel” for 240V usage. Alternate designs are available for 480V,
277V and three-phase (internally wired). Contact your Watlow representative.
WATLOW®
High-Temperature Heaters
Ceramic Fiber Heaters
C
C
E
E
A
L
C
C
D
A
A
B
B
B
A
B
D
D
E
Type 1
Full Vestibule
(Style A Leads Illustrated)
(Default Lead Style)
E
Type 2
Left Vestibule
(Style A Leads Illustrated)
Type 3
Right Vestibule
(Style A Leads Illustrated)
Type 4
No Vestibule
(Style A Leads Illustrated)
Semi-Cylindrical Units—High Watt Density Sinuated Elements (see page 434)
Dimensions, in. (mm)
Heated Size
Type 1, 2, & 3 Sizes
Electrical Ratings
Approx. Net Wt.
Vestibule Sizes
I.D. (A) Length (B) O.D. (C) Length (L) Dia. (D) Length (E)
Power
Surface
Strip
Type 1 Type 4
in. (mm) in. (mm) in. (mm) in. (mm)
in. (mm) in. (mm)
(Watts) Loading
Lead
Full
No
±1/8 (±3.2)+1/16 -1/8
(Ref) +1/16 -1/8 ±1/8 (±3.2) +1/16 -1/8
±5%
W/in2 (W/cm2) Width Vest. Vest.
(+1.6 - 3.2)
(+1.6 - 3.2)
(+1.6 - 3.2) Volts
in. (mm) lbs (kg) lbs (kg) Delivery
5(127)6 (152)19 (229)11 (279) 31/2(89)
12 (305) 19 (229)17 (432) 31/2(89)
18 (457) 19 (229)23 (584) 31/2(89)
24 (610) 19 (229)29 (737) 31/2(89)
30 (762) 19 (229)35 (889) 31/2(89)
36 (914) 19 (229)41 (102) 31/2(89)
61/2 (165) 6 (152) 101/2(267) 12 (305) 5 (127)
12 (305) 101/2(267) 18 (457) 5 (127)
18 (457) 101/2(267) 24 (610) 5 (127)
24 (610) 101/2(267) 30 (762) 5 (127)
30 (762) 101/2(267) 36 (914) 5 (127)
36 (914) 101/2(267) 42 (1067) 5 (127)
8 (203) 6 (152)12 (305)12 (305) 61/2(165)
12 (305) 12 (305) 18 (457) 61/2(165)
18 (457) 12 (305) 24 (610) 61/2 (165)
24 (610) 12 (305) 30 (762) 61/2 (165)
30 (762) 12 (305) 36 (914) 61/2 (165)
36 (914)12 (305)42(1067)61/2 (165)
21/2(64) 60
750 15.9 (2.5) 3/8 (10) 3.1 (1.4) 2.3(1.0)
1
2 /2(64) 60 1400 14.9 (2.3) 3/4 (19) 4.5 (2.0) 3.6(1.6)
21/2(64) 120 2100 14.9 (2.3) 1/2 (13) 5.2 (2.4) 4.3(2.0)
(19)
(2.7)
21/2(64) 120 2800 14.9 (2.3) 3/46.9
(3.1) 6.0
21/2(64) 240 3500 14.9 (2.3) 1/2 (13) 8.3 (3.8) 7.4(3.4)
21/2(64) 240 4200 14.9 (2.3) 1/2 (13) 9.6 (4.4) 8.7(3.9)
3
(76) 60
1000 16.3 (2.5) 1/2 (13) 3.6 (1.6) 2.4(1.1)
3
(76) 120 2000 16.3 (2.5) 1/2 (13) 5.1 (2.3) 3.9(1.8)
(19)
(2.5)
3
(76) 120 3000 16.3 (2.5) 3/46.8
(3.1) 5.6
3
(76) 240 4000 16.3 (2.5) 1/2 (13) 9.5 (4.3) 7.4(3.4)
3
(76) 240 5000 16.3 (2.5) 1/2 (13) 11.0 (5.0) 9.3(4.2)
(19)
(5.1)
3
(76) 240 6000 16.3 (2.5) 3/412.4
(5.6) 11.2
3 (76) 60
1300 17.2 (2.7) 1/2 (13) 4.1 (1.9) 2.6(1.2)
3 (76) 120 2600 17.2 (2.7) 1/2 (13) 6.9 (3.1) 5.4(2.4)
3 (76)240 3900 17.2(2.7) 1/2 (13) 8.5 (3.9) 7.0(3.2)
3
(76) 240
5200 17.2 (2.7) 1/2 (13) 12.0 (5.4) 10.5(4.8)
3
(76) 240 6250 16.7 (2.6) 3/4 (19)
13.8 (6.3) 12.3(5.6)
(19)
(6.4)
3
(76) 240/2407800 17.2 (2.7) 3/415.6
(7.1) 14.1
Part
Number
M
VSa05A06T
M
VSa05A12T
M
VSa05A18T
M
VSa05A24T
M
VSa05A30T
M
VSa05A36T
M
VSa06J06T
M
VSa06J12T
M
VSa06J18T
M
VSa06J24T
M
VSa06J30T
MVSa06J36T
M
VSa08A06T
M
VSa08A12T
M
VSa08A18T
M
VSa08A24T
M
VSa08A30T
MVSa08A36Tb
CONTINUED
•M - Manufacturing lead times
WATLOW®
All units in this table have 2 ±1/4 inch thick walls.
All units in this table are suitable for use up to 1800°F (982°C) maximum surface temperature.
1 Add Type number (Type 1 - 4) in the blank position in the part number. Example: VS106J06T. For unheated
units, see catalog page 444.
Sinuated wire, high watt density units are provided with embedded sinuated elements and high emissivity
coating unless exposed sinuated is specified when manufactured. (These are not stocked.) Contact your
Watlow representative.
Overall length applies only to the full vestibule (Type 1) units. Types 2 and 3 are shorter by one vestibule
length. Type 4 length equals (B).
Type 2 (left vestibule) and Type 3 (right vestibule) style units are not stocked. They are, however, still standard
units and designs are kept on file.
2
These units have dual elements to use in “parallel” for 240V usage. Alternate designs are available for 480V,
277V and three-phase (internally wired). Contact your Watlow representative.
453
High-Temperature Heaters
Ceramic Fiber Heaters
C
C
E
A
A
B
A
B
B
24
0V
E
A
B
D
E
Leads on dual
circuit units
only. See
ratings below.
0V
D
24
L
C
C
D
E
Type 1
Full Vestibule
(Style A Leads Illustrated)
(Default Lead Style)
Type 2
Left Vestibule
(Style A Leads Illustrated)
Type 3
Right Vestibule
(Style A Leads Illustrated)
Type 4
No Vestibule
(Style A Leads Illustrated)
Semi-Cylindrical Units—High Watt Density Sinuated Elements (see page 434)
Dimensions, in. (mm)
Heated Size
Type 1, 2, & 3 Sizes
Electrical Ratings
Approx. Net Wt.
Vestibule Sizes
I.D. (A) Length (B) O.D. (C) Length (L) Dia. (D) Length (E)
Power
Surface
Strip
Type 1 Type 4
in. (mm) in. (mm) in. (mm) in. (mm)
in. (mm) in. (mm)
(Watts) Loading
Lead
Full
No
2
2
1
1
1
1
1
1
1
1
± /8 (±3.2)+ /16 - /8
(Ref) + /16 - /8 ± /8 (±3.2) + /16 - /8
±5% W/in (W/cm ) Width Vest. Vest.
(+1.6 - 3.2)
(+1.6 - 3.2)
(+1.6 - 3.2) Volts
in. (mm) lbs (kg) lbs (kg) Delivery
10 (254)
12 (305)
14 (356)
16 (406)
12
18
24
30
36
12
18
24
30
36
12
18
24
30
36
12
18
24
30
36
(305)14
(457)14
(610)14
(762)14
(914)14
(305)16
(457)16
(610)16
(762)16
(914)16
(305)18
(457)18
(610)18
(762)18
(914)18
(305)20
(457)20
(610)20
(762)20
(914)20
(356) 18 (457)
(356) 24 (610)
(356) 30 (762)
(356) 36 (914)
(356) 42 (1067)
(406) 18 (457)
(406) 24 (610)
(406) 30 (762)
(406) 36 (914)
(406) 42 (1067)
(457) 18 (457)
(457) 24 (610)
(457) 30 (762)
(457) 36 (914)
(457) 42 (1067)
(508) 18 (457)
(508) 24 (610)
(508) 30 (762)
(508) 36 (914)
(508) 42 (1067)
•M - Manufacturing lead times
454
18(203)
18(203)
18(203)
18 (203)
18 (203)
10 (254)
10 (254)
10 (254)
10 (254)
10 (254)
12 (305)
12 (305)
12 (305)
12 (305)
12 (305)
14 (356)
14 (356)
14 (356)
14 (356)
14 (356)
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
(76) 240 320017.0 (2.6)
(76) 240 480017.0 (2.6)
(76) 240 640017.0 (2.6)
(76)240/240 8000 17.0 (2.6)
(76)240/240 9600 17.0 (2.6)
(76) 240
3800 16.8 (2.6)
(76) 240
5700 16.8 (2.6)
(76) 240
7600 16.8 (2.6)
(76)240/240 9600 17.0 (2.6)
(76)240/240 1140016.8 (2.6)
(76) 240
4400 16.7 (2.6)
(76) 240
6600 16.7 (2.6)
(76)240/240 8800 16.7 (2.6)
(76)240/240 1140017.3 (2.7)
(76)240/240 13200 16.7 (2.6)
(76) 240
5000 16.6 (2.6)
(76)240/240 7500 16.6 (2.6)
(76)240/240 10,00016.6 (2.6)
(76)240/240 12,80016.8 (2.6)
(76)240/240 15,00016.6 (2.6)
1/2
(13) 8.5(3.9) 5.8(2.6)
(13) 12.0(5.4) 9.3(4.2)
3/4
(6.3)
(19) 13.811.1
(5.0)
3/4
(8.0)
(19) 17.614.9
(6.8)
1/2 (13) 21.3(9.7) 18.6(8.4)
1/2 (13)
8.9(4.0) 5.9(2.7)
3/411.2
(5.1) 8.1
(19)
(3.7)
3/4
(7.6)
(19) 16.713.6
(6.2)
1/2 (13) 18.0(8.2) 14.9(6.8)
3/4
(8.7)
(19) 19.216.1
(7.3)
1/2 (13) 11.4(5.2) 7.7(3.5)
3/412.9
(5.9) 9.4
(19)
(4.3)
1/2 (13) 16.3(7.4) 12.7(5.8)
3/4
(8.8)
(19) 19.415.8
(7.2)
3/4
(10.2)
(19) 22.418.8
(8.5)
1/2 (13) 11.8(5.4) 8.0(3.6)
3/4
(6.8)
(19) 15.111.3
(5.1)
1/2 (13) 18.1(8.2) 14.3(6.5)
3/4 (19) 22.318.5
(10.1)
(8.4)
3/4 (19) 26.422.6
(12.0)
(10.3)
1/2
Part
Number
M
VSa10A12T
M
VSa10A18T
M
VSa10A24T
M
VSa10A30Tb
M
VSa10A36Tb
M
VSa12A12T
M
VSa12A18T
M
VSa12A24T
M
VSa12A30Tb
M
VSa12A36Tb
M
VSa14A12T
M
VSa14A18T
M
VSa14A24Tb
M
VSa14A30Tb
M
VSa14A36Tb
M
VSa16A12T
M
VSa16A18T
M
VSa16A24Tb
M
VSa16A30Tb
M
VSa16A36Tb
All units in this table have 2 ±1/4 inch thick walls.
All units in this table are suitable for use up to 1800°F (982°C) maximum surface temperature.
1 Add Type number (Type 1 through 4) in the blank position in the part number. Example VS106J06T.
For unheated units, see catalog page 444.
Sinuated wire, high watt density units are provided with embedded sinuated elements and high emissivity coating unless exposed sinuated is specified when manufactured. (These are not stocked.) Contact your Watlow representative.
Overall length applies only to the full vestibule (Type 1) units. Types 2 and 3 are shorter by one Vestibule length. Type 4 length equals (B).
Type 2 (left vestibule) and Type 3 (right vestibule) style units are not stocked. They are, however, still
standard units and designs are kept on file.
2
These units have dual elements to use in “parallel” for 240V usage. Alternate designs are available for 480V, 277V and three-phase (internally wired). Contact your Watlow representative.
WATLOW®
High-Temperature Heaters
Ceramic Fiber Heaters
Ordering Information
VF - Flat
VS - Semi-Cylindrical
Part Number
①
②
Base
Code
Nbr.
⑤
Base
Code
Nbr.
⑦
Base
Code
Nbr.
④
Base
Code
Nbr.
⑥
Base
Code
Nbr.
Base
Code
Nbr.
Base
Code
Nbr.
⑧
Base
Code
Nbr.
⑨
Base
Code
Nbr.
V
F
5
1
2
A
1
2
S
③
① ② ③ ④ ⑤ ⑥ ⑦⑧ ⑨ Base Code Number
⑩
Modification Options
⑩
⑪
⑫
⑭
Lead
Lead
Options Length
Modification
Options
0
⑭
⑬
0
Lead Length
A=
0 in.
T=
14 in.
B=
1 in.
U=
15 in.
E=
2 in.
V=
16 in.
F=
3 in.
W=
17 in.
G=
4 in.
X=
18 in.
0=
None
A=
0.140 thermocouple tube I.D. center of heated length of unit
B=
0.265 thermocouple tube I.D. center of heated length of unit
E=
Black surface coat
H=
5 in.
Y=
19 in.
F=
Black surface coat 0.140 thermocouple tube I.D. center of
heated length of unit
J=
6 in.
1=
20 in.
K=
7 in.
2=
21 in.
Black surface coat 0.265 thermocouple tube I.D. center of
heated length of unit
L=
8 in.
3=
22 in.
M=
9 in.
4=
23 in.
Lead Options
N=
10 in.
6=
24 in.
P=
11 in.
7=
30 in.
R=
12 in.
8=
36 in.
S=
13 in.
9=
42 in.
G=
⑬
0=
None
1=
601 Alloy 600 strip A style
2=
601 Alloy 600 strip B style
3=
601 Alloy 600 strip C style
9=
Flex NI, MGT A style
A=
Flex NI, MGT B style
B=
Flex NI, MGT C style
E=
Chromel® -A / NI, A style
F=
Chromel® -A / NI, B style
G=
Chromel® -A / NI, C style
Notes:
•If the order is placed before 11:00 AM CST, heaters with standard leads (...1R or ...2R) ship the same day. Heaters with non-standard leads
ship the next day.
•The BTE (between-the-element) is NOT covered in this system yet. Please contact your Watlow representative for availability.
WATLOW®
455
High-Temperature Heaters
Ceramic Fiber Heaters
How to Order
Made-to-Order Units
Ordering Information
Ordering Hints
Quantity: When ordering, specify quantity of units
desired. Semi-cylindrical units are sold as “each half.”
Two halves to make a pair are usually required. Please
include the number of desired spares or extras in the total
quantity.
Part number: Use the part number if an exact re-order
of a previously designed made-to-order unit is needed.
Please reconfirm volts and watts, lead orientation and
length. Most heaters allow selection of several stock
modifications (see page 446) and termination options
(see pages 440 and 441).
Dimensions for made-to-order units: Include a
drawing if possible. Specify the heated area, width
and length, overall width/length, thickness, electrical
ratings, etc.
Wattage: 6.5 to 25 W/in2 (1.0 - 3.9 W/cm2) on the
heating surface is the recommended watt density range
for operation in the 1500 to 2200°F (815 - 1204°C)
range. (Note: At the higher temperatures, lower watt
densities must be employed.) Please provide operating
temperatures and conditions. Contact your Watlow
representative for higher watt densities at other
temperatures. Generally, for higher operating temperature
limits, lower watt densities must be used.
Voltage: 60, 120 and 240VAC are offered on units.
However, up to 600 volts is possible with extended
capabilities. Internally connected three-lead, three-phase
units are also available on made-to-order units (these are
normally internally wye-connected). Contact your Watlow
representative on special voltage requirements.
Leads: Lead length and orientation (i.e. Style A, B
or C). Lead Style A, 12 in. (305 mm) long.
Shipping weight: The product listing tables show net
weights per unit. To estimate gross shipping weight,
add 30 percent to the total. Additional shipping/
packaging charges may be incurred for certain large
orders. Due to the light weight but large size of these
heaters, dimensional box weighting may occur on
expedited air shipments.
Ordering ceramic fiber heaters is easy. However, it is very
important to pay attention to part numbers and special
modifications details.
•Always fill in the “..._...” (blank) code position with the
correct Type number (see illustrations above the charts).
•Always provide the correct Lead Style letter.
(See suggested illustrations above the charts, but
Style A-12 will be the default lead if not otherwise
specified.)
•Supply a drawing or sketch whenever possible to
eliminate confusion.
•When ordering Type 6, 7, 8 units, be certain of the
heated area and no-heat area orientations desired.
•When planning to order Type 2 and/or Type 3 units
(left or right vestibule), there are three options to
consider—two of which could be used on the Type 1
items:
1.Order the appropriate full vestibule unit. The customer
can carefully remove the unneeded vestibule.
2.Order the full vestibule unit. Prior to shipping Watlow
will remove the unneeded vestibule as a stock
modification. There is a small additional charge for
this.
3.Special order the desired Type 2 or 3 unit. This
requires extended manufacturing of the heater and
increases delivery time, but will minimize costs.
456
WATLOW®