W A T L O W
Tubular and
Process Assemblies
Flange Immersion Heaters
Watlow flange heaters are easy to
install and maintain. Designed for
heating liquids and gases in tanks
and pressure vessels, flange
immersion heaters are ideal for
applications requiring higher
kilowatts.
Watlow flange heaters are made
with WATROD or FIREBAR®tubular
elements brazed or welded to a
flange. Stock flange heaters are
equipped with a general purpose
(NEMA 1) terminal enclosure.
Flange heaters, with FIREBAR
elements, also answer the need for
liquid immersion applications
requiring high kilowatts in small
tanks. The FIREBAR element’s
unique flat surface geometry packs
more power in a smaller bundle,
with lower watt density, making it
especially well suited for petroleumbased liquid heating applications.
Performance Capabilities
• Watt densities to 100 W/in
(15.5 W/cm2)
• Wattages to one megawatt
®
•UL
and CSA component
recognition to 480VÅ(ac) and
600VÅ(ac) respectively
• Incoloy®sheath temperatures to
1600°F (870°C)
• Passivated 316 stainless steel
sheath temperatures to 1200°F
(650°C)
• 304 stainless steel sheath
temperatures to 1200°F (650°C)
• Steel sheath temperatures to
750°F (400°C)
• Copper sheath temperatures to
350°F (175°C)
2
Features and Benefits
• ANSI and ANSI compatible 2,
21⁄2
inch flanges provide appropriate
heater size-to-application and fit.
• Flange sizes up to 24 inches
available on made-to-order units.
• Element sheath and flange
materials to meet application
needs.
• Integral thermowells provide
convenient temperature sensor
insertion and replacement without
draining the fluid being heated.
• A standard, general purpose
(NEMA 1) terminal enclosure
offers easy access to wiring.
• Element support(s) provide
proper element spacing to
maximizing heater performance
and life.
Conduit Opening
, 3, 4, 5, 6, 8, 10, 12 and 14
On stock chart units:
• Three to five working days on most heaters
• 10 working days on special voltages and/or
wattages
• 15 working days on special element lengths
Flange
Terminal Enclosure
Thermowell
FIREBAR
Heating Element
WATROD Heating Element
• To facilitate lifting, drilled and
tapped holes come supplied for
eye bolts on 10 inch and larger
flange heaters.
• All units are inspected and/or
tested to ensure element-toflange pressure seals do not leak.
• Four or six inch FIREBAR
flange heaters pack more
kilowatts in smaller bundles—in
liquid immersion applications, a
conventional 10 inch round
tubular element flange can be
replaced with a six inch FIREBAR
flange.
• WATROD hairpins are
repressed (recompacted) to
maintain MgO density, dielectric
strength, heat transfer and life.
• Branch circuits meet NEC with
48 amps per circuit maximum.
®
• UL
and CSA component
recognition under file numbers
E52951 and 31388 respectively.
See pages 268-271 for details.
Flange Heaters
Incoloy®is a registered trademark of
Special Metals Corporation.
UL®is a registered trademark of
Underwriter's Laboratories.
339
Tubular and
Stand-off
Terminal
Enclosure
Ref. 6"
(150 mm)
Stand-off
Height
ANSI
Flange
Conduit
Openings
Process Assemblies
Flange Immersion Heaters
Applications
• Water:
Deionized
Demineralized
Clean
Potable
Process
Options
Terminal Enclosures
General purpose terminal
enclosures, without thermostats, are
standard on all flange immersion
heaters. Optional terminal
enclosures include:
• General purpose (NEMA 1) with a
single or double pole thermostat.
• Moisture resistant (NEMA 4–
steel). Available with or without a
single or double pole thermostat.
• Corrosion resistant (NEMA 4X).
Available with or without a single
or double pole thermostat.
• Explosion resistant (NEMA 7)
class 1 groups C and D.
Available with or without a single
or double pole thermostat.
• Industrial water rinse tanks
• Vapor degreasers
• Hydraulic oil, crude, asphalt
• Lubricating oils at API specified
watt densities
• Air and gas flow
• Caustic solutions
• Explosion/moisture resistant
(NEMA 7/4) combinations.
Available with or without a single
or double pole thermostat.
• For class 1, group B enclosures,
consult your Watlow
representative.
Enclosure Enhancements
• Enclosure heater to solve
condensation and freeze
problems.
• Power distribution blocks to
facilitate power feed line wiring.
Prior to ordering, refer to the
terminal enclosure dimensions on
page 341. Order by adding the
appropriate suffix letter(s) to the
base flange heater code number, as
• Chemical baths
• Process air equipment
• Boiler equipment
• Freeze protection of any fluid
• Anti-freeze (glycol) solutions
• Paraffin
shown on the Build-a-Code chart.
Heater code numbers and suffix
letters are depicted on the Stock
and Options charts, pages 345 to
362. Specify class and group, if
applicable.
Caution
Explosion-resistant terminal
enclosures are intended to provide
explosion containment in the
electrical termination/wiring
enclosure only. No portion of the
assembly outside of this enclosure
is covered under this NEMA rating.
NEMA rating effectiveness may be
compromised by abuse or
misapplication.
Stand-off Terminal Enclosures
Stand-off terminal enclosures
provide an air-insulating barrier
between the flange and terminal
enclosure by mounting the
terminations and wiring away from
the flange. Stand-off terminal
enclosures are recommended
CSA Certified Enclosures
CSA certified moisture and/or
explosion resistant terminal
enclosures protect wiring in
hazardous gas environments.
These terminal enclosures, covered
under CSA file number 61707, are
340
whenever a process operating
temperature exceeds 400°F
(205°C). This helps minimize
terminal enclosure temperatures.
To order, specify stand-off terminal
enclosure.
available on all WATROD and
FIREBAR flange heaters. For
additional information, consult your
Watlow representative.
To order, specify CSA certified
enclosure, process temperature
(°F), maximum working pressure of
application (psig), media being
heated and heater mounting
orientation (horizontal or vertical)
and flange size.
W A T L O W
K
E
K
E
K
E
E
K
Tubular and
Process Assemblies
Flange Immersion Heaters
Options
4-8 inches NEMA 1
and NEMA 4
10-14 inches
NEMA 1
10-14 inches
NEMA 4
Terminal Enclosure Dimensions
Without Thermostat With Thermostat
Enclosure Flange Single Pole Double Pole
Type Size E Dimension K Dimension E Dimension K Dimension E Dimension K Dimension
General 2➀ 1 1⁄2 (38) 3 3⁄8 (86) — — — — — — — —
Purpose 21⁄2➀ 2 1⁄8 (54) 4 (102) — — — — — — — —
(NEMA 1) 3 3 13⁄
Moisture 22
Resistant 2 1⁄2 2 5⁄8 (67) 3 1⁄2 (89) — — — — — — — —
(NEMA 4) 3 2
Explosion 23
Resistant 2
(NEMA 7) 3 7
Class 1, 4 7 1⁄8 (181) 5 3⁄4 (146) 7 1⁄8 (181) 5 3⁄4 (146) 7 1⁄8 (181) 5 3⁄4 (146)
Groups 5 7
C and D 6 7
Consult 8 7 7⁄8 (200) 12 1⁄8 (308) 7 7⁄8 (200) 12 1⁄8 (308) 7 7⁄8 (200) 12 1⁄8 (308)
Factory 10 7
for 12 7
Group B) 14 7 7⁄8 (200) 19 3⁄8 (492) 7 7⁄8 (200) 19 3⁄8 (492) 7 7⁄8 (200) 19 3⁄8 (492)
➀ Terminal enclosure is octagonal, not round.
inch inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) inch (mm)
16 (97) 4
49
57
67
87
3
⁄8 (238) 7 (178) 9 3⁄8 (238) 7 (178) 9 3⁄8 (238) 7 (178)
1
⁄16 (179) 7 (178) 7 1⁄16 (179) 7 (178) 7 1⁄16 (179) 7 (178)
1
16 (179) 8 (203) 7
⁄
1
⁄16 (179) 10 1⁄32 (255) 7 1⁄16 (179) 10 1⁄32 (255) 7 1⁄16 (179) 10 1⁄32 (255)
5
8 (117) 9
⁄
3
8 (238) 7 (178) 9
⁄
1
16 (179) 8 (203) 7
⁄
10 7 1⁄16 (179) 11 5⁄8 (295) 7 1⁄16 (179) 11 5⁄8 (295) 7 1⁄16 (179) 11 5⁄8 (295)
12 7 1⁄
14 7
49
57
67
87
16 (179) 13
1
⁄16 (179) 15 1⁄8 (384) 7 1⁄16 (179) 15 1⁄8 (384) 7 1⁄16 (179) 15 1⁄8 (384)
5
⁄8 (67) 3 1⁄2 (89) — — — — — — — —
1
⁄8
3
⁄8 (238) 7 (178) 9 3⁄8 (238) 7 (178) 9 3⁄8 (238) 7 (178)
1
⁄16 (179) 7 (178) 7 1⁄16 (179) 7 (178) 7 1⁄16 (179) 7 (178)
1
⁄16
1
⁄16 (179) 10 1⁄32 (255) 7 1⁄16 (179) 10 1⁄32 (255) 7 1⁄16 (179) 10 1⁄32 (255)
1
2 (343) 7
⁄
(54) 4 (102) 9
(179) 8 (203) 7
1
16 (179) 13
⁄
3
(238) 7 (178) 9
⁄8
1
(179) 8 (203) 7
⁄16
1
2 (343) 7
⁄
10 7 3⁄4 (197) 13 3⁄4 (349) 7 3⁄4 (197) 13 3⁄4 (349) 7 3⁄4 (197) 13 3⁄4 (349)
12 7
14 7
1
⁄2
3
(197) 15
⁄4
3
⁄4 (197) 17 1⁄4 (438) 7 3⁄4 (197) 17 1⁄4 (438) 7 3⁄4 (197) 17 1⁄4 (438)
1
⁄16 (78) 3 3⁄4 (95) — — — — — — — —
1
3
⁄16
1
⁄8 (181) 5 3⁄4 (146) 7 1⁄8 (181) 5 3⁄4 (146) 7 1⁄8 (181) 5 3⁄4 (146)
7
⁄8
7
⁄8 (200) 9 7⁄8 (251) 7 7⁄8 (200) 9 7⁄8 (251) 7 7⁄8 (200) 9 7⁄8 (251)
7
⁄8 (200) 14 5⁄8 (371) 7 7⁄8 (200) 14 5⁄8 (371) 7 7⁄8 (200) 14 5⁄8 (371)
7
⁄8 (200) 15 7⁄8 (403) 7 7⁄8 (200) 15 7⁄8 (403) 7 7⁄8 (200) 15 7⁄8 (403)
(78) 3
(200) 8
7
⁄8
3
⁄4
7
⁄8
(403) 7
3
⁄4
(197) 15
7
⁄8
(403) 7
(95) — — — — — — — —
(225) 7
7
⁄8
(200) 8
7
⁄8
(225) 7
4-14 inches
NEMA 7
3
8 (238) 7 (178)
⁄
1
16 (179) 8 (203)
⁄
1
16 (179) 13
⁄
3
(238) 7 (178)
⁄8
1
(179) 8 (203)
⁄16
3
(197) 15
⁄4
7
(200) 8
⁄8
1
2 (343)
⁄
7
⁄8
7
⁄8
Flange Heaters
(403)
(225)
341
Tubular and
Process Assemblies
Flange Immersion Heaters
Options
Thermocouples
ASTM Type J or K thermocouples
offer more accurate sensing of
process and/or sheath temperatures. A thermocouple may be
inserted into the thermowell or
attached to the heater’s sheath.
Thermocouples are supplied with
120 inch (3050 mm) leads (longer
lead lengths available). Unless
otherwise specified, thermocouples
are supplied with temperature
ranges detailed on the
Thermocouple Types chart.
Using a thermocouple requires an
appropriate temperature and power
control. These must be purchased
separately. Watlow offers a wide
variety of temperature and power
controls to meet virtually all
applications. Temperature controls
can be configured to accept
process variable inputs, too.
Thermostats
To provide process temperature
control, Watlow offers optional
single pole, single throw (SPST) and
double pole, single throw (DPST)
thermostats.
Unless otherwise specified,
Consult your Watlow representative
for details.
To order, specify Type J or K
thermocouple and lead length.
Indicate if the thermocouple is for
process temperature sensing or
heater sheath high-limit protection.
Please specify if the flange heater
will be mounted vertical or horizon-
tal in the tank. If vertical, specify if
the housing is on top or bottom.
thermostats are mounted inside the
terminal enclosure. For details
and ordering information, refer to
Thermostats on pages 423 to 425.
Please verify that the thermostat’s
sensing bulb O.D. is compatible with
the flange heater’s thermowell I.D.
If the flange heater is part of an
in-line circulation heating
application, indicate flow direction
relative to the heater’s enclosure.
RTDs
If your process requires greater
temperature sensing accuracy than
is possible with thermocouples,
Watlow can also supply RTDs in DIN
or JIS calibrations. Consult Watlow
for details.
Thermocouple Types
Recommended
ASTM Conductor Characteristics Temperature Range
Type Positive Negative °F (°C)
J Iron Constantan 0 to 1000 (-20 to 540)
(Magnetic) (Non-magnetic)
K Chromel
(Non-magnetic) (Magnetic)
➀
Type J and Type K thermocouples are rated 32 to 1382°F and 32 to 2282°F (0-750°C and
0-1250°C), respectively. Watlow does not recommend exceeding temperature ranges
shown on this chart for the tubular product line.
®
Alumel
®
0 to 2000 (-20 to 1100)
➀
Wattages and Voltages
Watlow routinely supplies flange
immersion heaters with 240 to
480VÅ(ac) as well as wattages from
150 watts to one megawatt. If
®
and Chromel®are registered trademarks
Alumel
of the Hoskins Manufacturing Company.
342
required, Watlow will make heaters
with voltage up to 600VÅ(ac) and
wattage beyond one megawatt. For
more information on special voltage
Branch Circuits
Branch circuits are subdivided by
National Electrical Code (NEC)
requirements to a maximum of
and wattage configurations, consult
your Watlow representative.
48 amps per circuit. Consult factory
for circuit requirements other than
those listed in the stock charts.
W A T L O W
Direction of Flow
Tubular and
Process Assemblies
Flange Immersion Heaters
Options
Sheath Materials
The following sheath materials are
available on WATROD and FIREBAR
flange heaters:
External Finishing
Passivation
During the manufacturing process,
particles of iron or tool steel may
become embedded in the stainless
steel or alloy sheath. If not removed,
these particles may
Standard Sheath Materials
WATROD Incoloy
FIREBAR Incoloy
corrode, produce rust spots and/or
contaminate the process. For
critical sheath applications,
passivation will remove free iron
from the sheath. To order, specify
passivation.
®
316 stainless steel
Steel
Copper
®
Made-to-Order Sheath Materials
WATROD 304 stainless steel
FIREBAR 304 stainless steel
Monel
®
Exotic Sheath Materials
Consult your Watlow representative
for details and availability.
Other Finishes
Simple belt polishing and glass
beading are available to meet
cosmetic demands. Consult factory
for details.
Flange Heaters
Flanges
Flange Sizes and Styles
Standard: 2➀, 21⁄2➀, 3, 4, 5, 6, 8, 10,
12 and 14 inch ANSI raised
face/blind flanges.
Made-to-Order: 16, 18, 20 and 24
inch in any recognized
configuration, as well as customer
specified. Over 24 inch, consult
Watlow Process Systems.
Gaskets
Rubber, asbestos-free and spiral
wound gaskets are available for all
flange sizes. Order by specifying
gasket type, flange size/rating,
process operating temperature and
pressure.
To make the correct selection, see
the Gasket Selection chart.
Baffles
For forced circulation applications,
baffles can be arranged on the
heating element bundle to enhance
and/or modify fluid or gas flow for
better heat transfer.
Flange Materials
Standard Carbon steel
316 stainless steel
304 stainless steel
Made-to-Order Exotic materials to
meet specific
application needs➁
It provides a recommended gasket
type and effective temperature
rating.
To use this chart, multiply operating
temperature by the operating
pressure to arrive at “Maximum
PSIG X °F.” This is listed in the
chart’s first column.
For open tank or convection heating
applications, standard element
supports will be supplied.
To order, specify baffles.
Pressure Classes
Standard 150 lb
Made-to-Order 300 lb
600 lb
Over 600 lb
➁
Gasket Selection
Maximum Temperature
PSIG X °F °F Gasket Type
Up to 15,000 300 Rubber
Over 250,000 700 Asbestos-Free
Over 250,000 ➂ Spiral Wound
➂ Depends on metal gasket material.
Gasket
➀ ANSI compatible only.
➁ Consult Watlow Process Systems in
Troy, Missouri.
®
is a registered trademark of
Monel
Special Metals Corporation.
343
Tubular and
C
D
E
F
A
No-Heat Section
K
B
Immersed Length ± 1%
H
Bundle
150 lb Flange
Conduit Opening
WATROD Element
Thermowell for 0.375"
(10 mm) Diameter Bulb
No-Heat
Section
Process Assemblies
Flange Immersion Heaters
Application Hints
• Select the recommended heating
element sheath material and watt
density for the substance being
heated. Use the Supplemental
Applications Chart on pages
263 to 266. If unable to
determine the correct heating
element sheath material and type,
consult your Watlow
representative.
• Extend the element no-heat
section completely into the fluid
being heated to help prevent
premature heater failure. See
accompanying illustration for
proper no-heat section
placement.
• Locate flange heater low in the
tank, but above the sludge level.
• Choose a FIREBAR element when
your application requires a
smaller system package or lower
watt density.
• Ensure wiring integrity by keeping
terminal enclosure temperature
below 400°F (205°C).
• Keep electrical connections
clean, dry and tight.
• Minimize problems associated
with low liquid level conditions by
using low liquid level sensor or
sheath temperature high-limit
control.
• Periodically remove the flange
assembly to inspect and clean
the heating element(s). This
preventive maintenance will
reduce premature failure and
optimize heater performance.
• Refer to the Installation and
Maintenance Instructions for
correct orientation of FIREBAR
elements. This is important in air
applications with customer
supplied circulation tanks.
Correct element orientation to
flow minimizes pressure drop,
increases buoyancy force and
heater performance.
Flange Immersion Heater
➁
➀
For terminal enclosure
dimensions (K and E) see
page 341.
Flange Immersion Heater Dimensions
Flange
Element Flange
Type Size Siz e Number Length A Dimension C Dimension D Dimension F Dimension H Dimension Elements
WATROD 2➀
WATROD 2
WATROD 3
WATROD 4
WATROD 5
WATROD 6
WATROD 8
WATROD 10 1 (25) 12 18 (457) 6 (152) 14
WATROD 12 1 (25) 12 18 (457) 6 (152) 17 (432) 19 (483) 11⁄4 (32) 113⁄4 (298) 36 54
WATROD 14 1
➀ Thermowells are not provided on two and 21⁄2 inch units. 150 lb rating is not available on two and 21⁄2 inch stock units.
Note: The number and size of conduit openings will comply with the National Electrical Code standards.
344
Mounting Hole
in in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) Std Max
3
(19) 4 — — 2 (51) 4
⁄4
1
⁄2➀3⁄4 (19) 4 — — 3 (76) 51⁄2 (140) 7 (178)
3
⁄4 (19) 4 12 (305) 4 (102) 6 (152) 71⁄2 (191)
3
(19) 8 12 (305) 4 (102) 7
⁄4
7
⁄8 (22) 8 12 (305) 4 (102) 81⁄2 (216) 10 (254)
7
⁄8 (22) 8 12 (305) 4 (102) 91⁄2 (241) 11 (279) 1 (25) 6 (152) 12 15
7
(22) 8 18 (457) 6 (152) 11
⁄8
1
(29) 12 18 (457) 6 (152) 18
⁄8
Thermowell Number of
3
(121) 6 (152)
⁄4
1
(191) 9 (229)
⁄2
3
(298) 13
⁄4
1
⁄4 (362) 16 (406) 13⁄16 (30) 93⁄4 (248) 27 36
3
(476) 21 (533) 1
⁄4
1
(343) 1
⁄2
9
(14) 2 (51) 3 3
⁄16
3
⁄8 (10) 21⁄4 (57) 3 3
15
⁄16 (24) 23⁄4 (70) 3 6
15
(24) 3
⁄16
15
⁄16 (24) 5 (127) 6 9
1
(29) 7
⁄8
3
(35) 12
⁄8
7
(98) 6 6
⁄8
13
(198) 18 24
⁄16
3
(324) 45 72
⁄4
W A T L O W
C
D
E
F
A
No-Heat Section
K
H
Bundle
1" (25 mm)
FIREBAR Element
B
Immersed Length ± 1%
150 lb Flange
1" (25 mm)
Conduit Openings
Thermowell for 0.375"
(10 mm) Diameter Bulb
Tubular and
Process Assemblies
Flange Immersion Heaters
Flange Immersion Heater Dimensions
Flange
Element Flang e Mounting Hole Thermowell
Type Size Size Number Length
in in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) Standard
3
FIREBAR 4
FIREBAR 6
⁄4 (19) 8 12 (305) 4 (102) 71⁄2 (191) 9 (229)15⁄16 (24) 37⁄8 (98) 6
7
⁄8 (22) 8 12 (305) 4 (102) 91⁄2 (241) 11 (279) 1 (25) 6 (152) 15
6" O.D. Plate Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW
B Dimension
inch (mm) 1-Phase 3-Phase 1-Phase 3-Phase lbs (kg)
Applications: Process Water, Ethylene Glycol (50%)
2
45 W/in
Steel Flange 9 29 (737) FKC29A10➁ FKC29A3 FKC29A11➁ FKC29A5 27 (13)
3-Copper
(7 W/cm2)
4.5 16 (406) FKC16A10➁ FKC16A3➁ FKC16A11➁ FKC16A5 22 (10)
Application: Process Water
2
45 W/in
Steel Flange
3-Incoloy
(7 W/cm2)
9 28 (711) FKN28A10➁ FKN28A3➁ FKN28A11➁ FKN28A5 27 (13)
®
Applications: Cooking Oils, Ethylene Glycol (100%)
2
30 W/in
Steel Flange
3-Steel
(4.7 W/cm2)
6 29 (737) FKS29A10➁ FKS29A3➁ FKS29A11➁ FKS29A5 27 (13)
Applications: Medium Weight Oils, Heat Transfer Oils, Liquid Paraffin
2
15 W/in
Steel Flange
3-Incoloy
(2.3 W/cm2)
➂
3 28 (711) FKN28A12➁ FKN28A13➁ 27 (13)
®
Applications: Medium Weight Oils, Heat Transfer Oils, Lube Oils, Liquid Paraffin
2
10 W/in
Steel Flange
3-Steel
(1.6 W/cm2)
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
➂
2 29 (737) FKS29A12➁ FKS29A13➁ 27 (13)
240VÅ(ac) 240VÅ(ac) 480VÅ(ac) 480VÅ(ac) Weight
➁ Standard
➂ Must be operated 3-phase wye
A Dimension C Dimension D Dimension F Dimension H Dimension
Flange Heaters
For terminal enclosure
dimensions (K and E)
see page 341.
Elements
345
Tubular and
Process Assemblies
Flange Immersion Heaters
7" O.D. Plate Flange— WA TR OD Element
WATROD Immersed Code No. Est. Ship.
Description kW
B Dimension
inch (mm) 1-Phase Circuits 3-Phase Circuits 1-Phase Circuits 3-Phase Circuits lbs (kg)
Applications: Clean and Potable Water
100 W/in
Steel Flange
3-304 SS
(15.5 W/cm2)
2
12 18 (457) FLN18A10➁ 2 FLN18A3➁ 1 FLN18A11
Applications: Clean and Potable Water
2
80 W/in
Steel Flange 18 30 (762) FLN30A10➁ 2 FLN30A3 1 FLN30A11➁ 1 FLN30A5➁ 1 27 (13)
3-304 SS
(12.4 W/cm
2
)
4 (451) FLN17N10➁ 1 FLN17N3 1 FLN17N11➁ 1 FLN17N5➁ 1 22 (10)
9173⁄
Application: Process Water
2
60 W/in
Steel Flange
3-Incoloy
(9.3 W/cm2)
4.5 121⁄2 (318) FLN12J10➁ 1 FLN12J3 1 FLN12J11➁ 1 FLN12J5➁ 1 21 (10)
®
Applications: Cooking Oils, Ethylene Glycol (100%)
30 W/in2➂ 3173⁄4 (451) FLN17N12➁ 1 FLN17N13➁ 1 22 (10)
Steel Flange 4 18 (457) FLN18A12➁ 1 FLN18A13 1 22 (10)
3-Incoloy
(4.7 W/cm2)
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
®
6 30 (762) FLN30A12 1 FLN30A13 1 27 (13)
240VÅ(ac) No. of 240VÅ(ac) No. of 480VÅ(ac) No. of 480VÅ(ac) No. of Weight
➁
1 FLN18A5 1 22 (10)
➁
Standard
➂ Must be operated 3-phase wye
346
W A T L O W
Tubular and
Process Assemblies
Flange Immersion Heaters
3" 150 lb ANSI Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW
Application: Clean Water
2
60 W/in
Steel Flange 9211⁄
3-Copper 12 27 (686) FMC727A3 1 FMC727A11 1 FMC727A5 1 27 (13)
(9.3 W/cm
2
)15321⁄
Application: Process Water
48 W/in2 ➄➅ 4.5 131⁄
Steel Flange 6 18 (457) FMN718A10 1 FMN718A3 1 FMN718A11 1 FMN718A5 1 23 (11)
3-Incoloy
(7.5 W/cm
®
2
)925
Applications: Forced Air and Gases, Caustic Solutions, Degreasing Solutions
23 W/in2 ➄➅ 3 18 (457) FMNA18A10 1 FMNA18A3 1 FMNA18A11 1 FMNA18A5 1 23 (11)
Steel Flange 4.5 251⁄2 (648) FMNA25J10 1 FMNA25J3 1 FMNA25J11 1 FMNA25J5 1 27 (13)
3-Incoloy
®
(3.6 W/cm2) 7.5 401⁄2 (1029) FMNA40J10 1 FMNA40J3 1 FMNA40J11 1 FMNA40J5 1 30 (14)
Applications: Lightweight Oils, Degreasing Solutions, Heat Transfer Oils
2
23 W/in
Steel Flange 4.5 25
3-Steel 6 33 (838) FMS733A10 1 FMS733A3 1 FMS733A11 1 FMS733A5 1 28 (13)
(3.6 W/cm
2
) 7.5 401⁄2 (1029) FMS740J10 1 FMS740J3 1 FMS740J11 1 FMS740J5 1 30 (14)
B Dimension
240VÅ(ac) No. of 240VÅ(ac) No. of 480VÅ(ac) No. of 480VÅ(ac) No. of Weight
inch (mm) 1-Phase Circuits 3-Phase Circuits 1-Phase Circuits 3-Phase Circuits lbs (kg)
6151⁄2 (394) FMC715J10 1 FMC715J3 1 FMC715J11 1 FMC715J5 1 22 (10)
2 (546) FMC721J10 1 FMC721J3 1 FMC721J11 1 FMC721J5 1 25 (12)
2 (826) FMC732J3 1 FMC732J11 1 FMC732J5 1 28 (13)
18 38 (965) FMC738A3 1 FMC738A11 1 FMC738A5 1 30 (14)
25 51 (1295) FMC751A11 1 FMC751A5 1 34 (16)
1
30 60
2 (1537) FMC760J11➁ 1 FMC760J5➁ 1 36 (17)
⁄
2 (343) FMN713J10 1 FMN713J3 1 FMN713J11 1 FMN713J5 1 22 (10)
2 (521) FMN720J10 1 FMN720J3 1 FMN720J11 1 FMN720J5 1 25 (12)
7.5 201⁄
1
2 (648) FMN725J10 1 FMN725J3 1 FMN725J11 1 FMN725J5 1 27 (13)
⁄
12 33 (838) FMN733A3 1 FMN733A11 1 FMN733A5 1 28 (13)
1
15 40
2 (1029) FMN740J3 1 FMN740J11 1 FMN740J5 1 30 (14)
⁄
18 48 (1219) FMN748A3 1 FMN748A11 1 FMN748A5 1 32 (15)
6 33 (838) FMNA33A10 1 FMNA33A3 1 FMNA33A11 1 FMNA33A5 1 28 (13)
9 48 (1219) FMNA48A10 1 FMNA48A3 1 FMNA48A11 1 FMNA48A5 1 32 (15)
12.5 641⁄2 (1638) FMNA64J3 1 FMNA64J11 1 FMNA64J5 1 37 (17)
15 77 (1956) FMNA77A3 1 FMNA77A11 1 FMNA77A5 1 42 (19)
3 18 (457) FMS718A10 1 FMS718A3 1 FMS718A11 1 FMS718A5 1 23 (11)
1
(648) FMS725J10 1 FMS725J3 1 FMS725J11 1 FMS725J5 1 27 (13)
⁄2
9 48 (1219) FMS748A10 1 FMS748A3 1 FMS748A11 1 FMS748A5 1 32 (15)
12.5 641⁄2 (1638) FMS764J3 1 FMS764J11 1 FMS764J5 1 37 (17)
15 77 (1956) FMS777A3 1 FMS777A11 1 FMS777A5 1 42 (19)
CONTINUED
Flange Heaters
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
➁ Standard
➄ 240VÅ(ac) 3-phase can be rewired wye to
produce 1⁄3 more kW and watt density when
operated at 480VÅ(ac) 3-phase.
➅ Can be rewired wye to produce 1⁄3 of the
original kW and watt density (3-phase only).
347
Tubular and
Process Assemblies
Flange Immersion Heaters
3" 150 lb ANSI Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW
Applications: Medium Weight Oils, Heat Transfer Oils, Liquid Paraffin
16 W/in2➂ 1.5 131⁄2 (343) FMN713J12 1 FMN713J13 1 22 (10)
Steel Flange 2 18 (457) FMN718A12 1 FMN718A13 1 23 (11)
3-Incoloy
(2.5 W/cm
®
2
)325
Applications: Bunker C and #6 Fuel Oils
8 W/in2➂ 2 33 (838) FMS733A12 1 FMS733A13 1 28 (13)
Steel Flange 3 48 (1219) FMS748A12 1 FMS748A13 1 32 (15)
3-Steel 4641⁄2 (1638) FMS764J12 1 FMS764J13 1 37 (17)
(1.3 W/cm2) 5 77 (1956) FMS777A12 1 FMS777A13 1 42 (19)
B Dimension
240VÅ(ac) No. of 240VÅ(ac) No. of 480VÅ(ac) No. of 480VÅ(ac) No. of Weight
inch (mm) 1-Phase Circuits 3-Phase Circuits 1-Phase Circuits 3-Phase Circuits lbs (kg)
2 (521) FMN720J12 1 FMN720J13 1 25 (12)
2.5 201⁄
1
⁄2 (648) FMN725J12 1 FMN725J13 1 27 (13)
4 33 (838) FMN733A12 1 FMN733A13 1 30 (14)
2 (1029) FMN740J12 1 FMN740J13 1 30 (14)
5401⁄
6 48 (1219) FMN748A12 1 FMN748A13 1 33 (15)
4" 150 Lb ANSI Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW
B Dimension
inch (mm) 1-Phase Circuits 3-Phase Circuits 1-Phase Circuits 3-Phase Circuits lbs (kg)
Application: Clean Water
2
60 W/in
Steel Flange 18 21
12 151⁄2(394) FOC715J10 2 FOC715J3 1 FOC715J11 1 FOC715J5 1 31 (14)
1
⁄2(546) FOC721J10 2 FOC721J3 1 FOC721J11 1 FOC721J5 1 34 (16)
6-Copper 24 27 (686) FOC727A10 2 FOC727A3 2 FOC727A11 1 FOC727A5 1 36 (17)
(9.3 W/cm
2
)3032
1
(826) FOC732J3 2 FOC732J11 2 FOC732J5 1 39 (18)
⁄
2
36 38 (965) FOC738A3 2 FOC738A11 2 FOC738A5 1 43 (20)
50 51 (1295) FOC751A5 2 48 (22)
1
(1537) FOC760J5
⁄
60 60
2
Application: Deionized Water , Demineralized Water
2
60 W/in
316 SS Flange 18 22 (559) FOR722A10 2 FOR722A3 1 FOR722A11 1 FOR722A5 1 34 (16)
6-316 SS 24 27
(9.3 W/cm
Passivated 36 38
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
12 16 (406) FOR716A10 1 FOR716A3 1 FOR716A11 1 FOR716A5 1 31 (14)
1
2
) 30 33 (838) FOR733A3 2 FOR733A11 2 FOR733A5 1 39 (18)
⁄2(699) FOR727J10 2 FOR727J3 2 FOR727J11 1 FOR727J5 1 36 (17)
1
⁄2(978) FOR738J3 2 FOR738J11 2 FOR738J5 1 43 (20)
1
⁄2(1308) FOR751J5 2 53 (25)
50 51
60 61 (1549) FOR761A5 2 56 (26)
240VÅ(ac) No. of 240VÅ(ac) No. of 480VÅ(ac) No. of 480VÅ(ac) No. of Weight
➁
2 52 (24)
CONTINUED
➁ Standard
➂ Must be operated 3-phase wye
348
W A T L O W
Tubular and
Process Assemblies
Flange Immersion Heaters
4" 150 lb ANSI Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW
Application: Process Water
2
48 W/in
➄
Steel Flange 12 18 (457) FON718A10 2 FON718A3 1 FON718A11 1 FON718A5 1 32 (15)
6-Incoloy
(7.5 W/cm
®
2
)1825
Applications: Forced Air and Gases, Caustic Solutions, Degreasing Solutions
2
23 W/in
➄➅
Steel Flange 925
6-Incoloy
(3.6 W/cm
®
2
)1540
Applications: Lightweight Oils, Degreasing Solutions, Heat Transfer Oils
2
23 W/in
Steel Flange 925
6-Steel 12 33 (838) FOS733A10 2 FOS733A3 1 FOS733A11 1 FOS733A5 1 39 (18)
2
(3.6 W/cm
)1540
Applications: Medium Weight Oils, Heat Transfer Oils, Liquid Paraffin
2
16 W/in
➂
Steel Flange 4 18 (457) FON718A12 1 FON718A13 1 32 (15)
6-Incoloy
(2.5 W/cm
®
2
)625
Applications: Bunker C and #6 Fuel Oils
2
8 W/in
➂
Steel Flange 6 48 (1219) FOS748A12 1 FOS748A13 1 48 (22)
6-Steel 864
(1.3 W/cm
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
2
) 10 77 (1956) FOS777A12 1 FOS777A13 1 61 (28)
B Dimension
240VÅ(ac) No. of 240VÅ(ac) No. of 480VÅ(ac) No. of 480VÅ(ac) No. of Weight
inch (mm) 1-Phase Circuits 3-Phase Circuits 1-Phase Circuits 3-Phase Circuits lbs (kg)
9131⁄2(343) FON713J10 1 FON713J3 1 FON713J11 1 FON713J5 1 29 (14)
2
15 201⁄
(521) FON720J10 2 FON720J3 1 FON720J11 1 FON720J5 1 34 (16)
1
⁄2(648) FON725J10 2 FON725J3 1 FON725J11 1 FON725J5 1 36 (17)
24 33 (838) FON733A10 2 FON733A3 2 FON733A11 1 FON733A5 1 39 (18)
1
30 40
2
(1029) FON740J3 2 FON740J11 2 FON740J5 1 43 (20)
⁄
36 48 (1219) FON748A3 2 FON748A11 2 FON748A5 1 48 (22)
6 18 (457) FONA18A10 1 FONA18A3 1 FONA18A11 1 FONA18A5 1 32 (15)
1
2
(648) FONA25J10 1 FONA25J3 1 FONA25J11 1 FONA25J5 1 36 (17)
⁄
12 33 (838) FONA33A10 2 FONA33A3 1 FONA33A11 1 FONA33A5 1 39 (18)
1
2
(1029) FONA40J10 2 FONA40J3 1 FONA40J11 1 FONA40J5 1 43 (20)
⁄
18 48 (1219) FONA48A10 2 FONA48A3 1 FONA48A11 1 FONA48A5 1 48 (22)
1
25 64
⁄2(1638) FONA64J3 2 FONA64J11 2 FONA64J5 1 53 (24)
30 77 (1956) FONA77A3 2 FONA77A11 2 FONA77A5 1 61 (28)
6 18 (457) FOS718A10 1 FOS718A3 1 FOS718A11 1 FOS718A5 1 32 (15)
1
⁄2(648) FOS725J10 1 FOS725J3 1 FOS725J11 1 FOS725J5 1 36 (17)
1
2
(1029) FOS740J10 2 FOS740J3 1 FOS740J11 1 FOS740J5 1 43 (20)
⁄
18 48 (1219) FOS748A10 2 FOS748A3 1 FOS748A11 1 FOS748A5 1 48 (22)
1
25 64
⁄2(1638) FOS764J3 2 FOS764J11 2 FOS764J5 1 53 (24)
30 77 (1956) FOS777A3 2 FOS777A11 2 FOS777A5 1 61 (28)
3131⁄2(343) FON713J12 1 FON713J13 1 29 (14)
5201⁄
(521) FON720J12 1 FON720J13 1 34 (16)
2
1
⁄2(648) FON725J12 1 FON725J13 1 36 (17)
8 33 (838) FON733A12 1 FON733A13 1 39 (18)
1
10 40
(1029) FON740J12 1 FON740J13 1 43 (20)
⁄
2
12 48 (1219) FON748A12 1 FON748A13 1 48 (22)
5401⁄2(1029) FOS740J12 1 FOS740J13 1 43 (20)
1
⁄2(1638) FOS764J12 1 FOS764J13 1 53 (24)
➂
Must be operated 3-phase wye
➄ 240VÅ(ac) 3-phase can be rewired wye to
produce
1
⁄3 more kW and watt density when
➅ Can be rewired wye to produce
original kW and watt density
(3-phase only).
1
⁄3 of the
operated at 480VÅ(ac) 3-phase.
Flange Heaters
349
Tubular and
Process Assemblies
Flange Immersion Heaters
4" 150 lb ANSI Flange—FIREBAR Element
FIREBAR Immersed Code No. Est. Ship.
Description kW B Dimension 240V
Å(ac)
No. of 480V
inch (mm) 3-Phase Circuits 3-Phase Circuits lbs (kg)
Applications: Process Water, Ethylene Glycol (50%)
2
45 W/in
304 SS Flange 15 16 (406) FONF16A27 1 35 (20)
6-Incoloy
2
(7 W/cm
)2422
12 133⁄8 (340) FONF13G27 1 32 (20)
®
18 183⁄
30 277⁄
36 32
48 42
60 51
8 (467) FONF18G27 1 38 (21)
7
⁄8 (581) FONF22R27 2 FONF22R28 1 41 (21)
8 (708) FONF27R27 2 FONF27R28 1 44 (20)
7
⁄8 (835) FONF32R27 2 FONF32R28 1 46 (21)
3
⁄8 (1076) FONF42G28 2 50 (23)
7
8 (1318) FONF51R28 2 54 (25)
⁄
Applications: Cooking Oils, Ethylene Glycol (100%)
30 W/in2➂ 10 161⁄
304 SS Flange 13 19
6-Incoloy
®
17 241⁄2 (622) FONF24J12 1 FONF24J13 1 41 (19)
(4.7 W/cm2) 21 30 (762) FONF30A12 2 FONF30A13 1 44 (20)
25.5 35 (889) FONF35A12 2 FONF35A13 1 46 (21)
34 451⁄2 (1156) FONF45J12 2 FONF45J13 1 50 (23)
43 56 (1422) FONF56A13 2 54 (25)
2 (420) FONF16J12 1 FONF16J13 1 35 (16)
1
2 (495) FONF19J12 1 FONF19J13 1 38 (17)
⁄
Applications: Heat Transfer Oils, Mineral Oils, Degreasing Solutions
23 W/in2➇
304 SS Flange 10 191⁄2 (495) FONF19J20 1 38 (18)
6-Incoloy
(3.6 W/cm
®
2
7.5 161⁄2 (419) FONF16J20 1 35 (16)
12.8 241⁄
2 (622) FONF24J20 1 FONF24J19 1 41 (19)
) 15.8 30 (762) FONF30A20 1 FONF30A19 1 44 (20)
19 35 (889) FONF35A20 1 FONF35A19 1 46 (21)
25 451⁄2 (1156) FONF45J20 2 FONF45J19 1 50 (23)
32.3 56 (1422) FONF56A20 2 FONF56A19 1 54 (25)
Applications: Medium Weight Oils, Heat Transfer Oils, Lube Oils, Liquid Paraffin
15 W/in2➂ 4133⁄8 (340) FONF13G29 1 32 (15)
304 SS Flange 5 16 (406) FONF16A29 1 35 (16)
6-Incoloy
(2.3 W/cm
®
2
6183⁄8
)822
7
⁄8 (581) FONF22R29 1 FONF22R30 1 41 (19)
(467) FONF18G29 1 38 (18)
10 277⁄8 (708) FONF27R29 1 FONF27R30 1 44 (20)
12 327⁄8 (835) FONF32R29 1 FONF32R30 1 46 (21)
16 42
20 51
3
(1076) FONF42G29 1 FONF42G30 1 50 (23)
⁄8
7
(1318) FONF51R29 1 FONF51R30 1 54 (25)
⁄8
Applications: Bunker C and #6 Fuel Oils, Asphalt
8 W/in2➂ 2.5 161⁄2 (419) FONF16J22 1 35 (16)
(495) FONF19J22 1 38 (17)
304 SS Flange 3.25 191⁄
6-Incoloy
®
(1.3 W/cm2) 5.25 30 (762) FONF30A22 1 FONF30A21 1 44 (20)
10.75 56 (1422) FONF56A22 1 FONF56A21 1 54 (25)
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
2
4.25 241⁄2 (622) FONF24J22 1 FONF24J21 1 41 (19)
6.38 35 (889) FONF35A22 1 FONF35A21 1 46 (21)
8.5 451⁄2 (1156) FONF45J22 1 FONF45J21 1 50 (23)
➂ Must be operated 3-phase wye
➇ Can be rewired for 1-phase
Å(ac)
No. of Weight
350
W A T L O W
Tubular and
Process Assemblies
Flange Immersion Heaters
5" 150 lb ANSI Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW
B Dimension
inch (mm) 1-Phase Circuits 3-Phase Circuits 1-Phase Circuits 3-Phase Circuits lbs (kg)
Application: Clean Water
2
60 W/in
12 151⁄
Steel Flange 18 21
6-Copper 24 27 (686) FNC727A10 3 FNC727A3 2 FNC727A11 3 FNC727A5 1 40 (19)
(9.3 W/cm2)30321⁄
36 38 (965) FNC738A3 2 FNC738A11 2 FNC738A5 1 47 (22)
50 51 (1295) FNC751A5 2 52 (24)
60 60
2
60 W/in
18 151⁄2 (394) FNC715J10X 3 FNC715J3X 1 FNC715J11X 1 FNC715J5X 1 38 (18)
Steel Flange 27 211⁄
9-Copper 36 27 (686) FNC727A3X 3 FNC727A11X 3 FNC727A5X 1 45 (21)
(9.3 W/cm
2
)45321⁄2 (826) FNC732J3X 3 FNC732J11X 3 FNC732J5X 3 48 (22)
54 38 (965) FNC738A3X 3 FNC738A11X 3 FNC738A5X 3 53 (24)
75 51 (1295) FNC751A5X 3 60 (28)
90 601⁄
2 (394) FNC715J10 2 FNC715J3 1 FNC715J11 1 FNC715J5 1 35 (16)
1
⁄2 (546) FNC721J10 2 FNC721J3 1 FNC721J11 1 FNC721J5 1 38 (18)
2 (826) FNC732J3 2 FNC732J11 2 FNC732J5 1 43 (20)
1
2 (1537) FNC760J5➁ 2 56 (26)
⁄
2 (546) FNC721J10X 3 FNC721J3X 3 FNC721J11X 3 FNC721J5X 1 42 (19)
2 (1537) FNC760J5X
Application: Process Water
48 W/in2➄ 9131⁄
Steel Flange 12 18 (457) FNN718A10 2 FNN718A3 1 FNN718A11 1 FNN718A5 1 36 (17)
6-Incoloy
®
15 201⁄2 (521) FNN720J10 2 FNN720J3 1 FNN720J11 1 FNN720J5 1 38 (18)
(7.5 W/cm2)18251⁄
24 33 (838) FNN733A10 3 FNN733A3 2 FNN733A11 3 FNN733A5 1 43 (20)
30 40
36 48 (1219) FNN748A3 2 FNN748A11 2 FNN748A5 1 52 (24)
2
48 W/in
14 131⁄
Steel Flange 18 18 (457) FNN718A10X 3 FNN718A3X 1 FNN718A11X 1 FNN718A5X 1 39 (18)
9-Incoloy
®
23 201⁄2 (521) FNN720J10X 3 FNN720J3X 3 FNN720J11X 1 FNN720J5X 1 42 (19)
(7.5 W/cm2)27251⁄2 (648) FNN725J10X 3 FNN725J3X 3 FNN725J11X 3 FNN725J5X 1 45 (21)
36 33 (838) FNN733A3X 3 FNN733A11X 3 FNN733A5X 1 48 (22)
45 401⁄2 (1029) FNN740J3X 3 FNN740J11X 3 FNN740J5X 3 53 (24)
54 48 (1219) FNN748A3X 3 FNN748A11X 3 FNN748A5X 3 60 (28)
2 (343) FNN713J10 1 FNN713J3 1 FNN713J11 1 FNN713J5 1 33 (15)
2 (648) FNN725J10 2 FNN725J3 1 FNN725J11 1 FNN725J5 1 40 (19)
1
⁄2 (1029) FNN740J3 2 FNN740J11 2 FNN740J5 1 47 (22)
2 (343) FNN713J10X 3 FNN713J3X 1 FNN713J11X 1 FNN713J5X 1 35 (16)
Applications: Forced Air and Gases, Caustic Solutions, Degreasing Solutions
23 W/in2➄➅ 6 18 (457) FNNA18A10 1 FNNA18A3 1 FNNA18A11 1 FNNA18A5 1 36 (17)
Steel Flange 925
6-Incoloy
®
12 33 (838) FNNA33A10 2 FNNA33A3 1 FNNA33A11 1 FNNA33A5 1 43 (20)
(3.6 W/cm2)15401⁄2 (1029) FNNA40J10 2 FNNA40J3 1 FNNA40J11 1 FNNA40J5 1 47 (22)
18 48 (1219) FNNA48A10 2 FNNA48A3 1 FNNA48A11 1 FNNA48A5 1 52 (24)
25 641⁄2 (1638) FNNA64J3 2 FNNA64J11 2 FNNA64J5 1 57 (26)
30 77 (1956) FNNA77A3 2 FNNA77A11 2 FNNA77A5 1 65 (28)
1
(648) FNNA25J10 1 FNNA25J3 1 FNNA25J11 1 FNNA25J5 1 40 (19)
⁄2
240VÅ(ac) No. of 240VÅ(ac) No. of 480VÅ(ac) No. of 480VÅ(ac) No. of Weight
➁
3 66 (30)
CONTINUED
Flange Heaters
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on size
➁ Standard
➄ 240VÅ(ac) 3-phase can be rewired wye to
1
3 more kW and watt density when
produce
⁄
operated at 480VÅ(ac) 3-phase.
➅
Can be rewired wye to produce 1⁄3 of the
original kW and watt density
(3-phase only).
351
Tubular and
Process Assemblies
Flange Immersion Heaters
5" 150 lb ANSI Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW
B Dimension
inch (mm) 1-Phase Circuits 3-Phase Circuits 1-Phase Circuits 3-Phase Circuits lbs (kg)
Applications: Forced Air and Gases, Caustic Solutions, Degreasing Solutions
2
23 W/in
Steel Flange 14 251⁄
9-Incoloy
9 18 (457) FNNA18A10X 1 FNNA18A3X 1 FNNA18A11X 1 FNNA18A5X 1 39 (18)
®
18 33 (838) FNNA33A10X 3 FNNA33A3X 1 FNNA33A11X 1 FNNA33A5X 1 48 (22)
2 (648) FNNA25J10X 3 FNNA25J3X 1 FNNA25J11X 1 FNNA25J5X 1 45 (21)
(3.6 W/cm2)23401⁄2 (1029) FNNA40J10X 3 FNNA40J3X 3 FNNA40J11X 1 FNNA40J5X 1 53 (24)
27 48 (1219) FNNA48A10X 3 FNNA48A3X 3 FNNA48A11X 3 FNNA48A5X 1 60 (28)
38 641⁄
2 (1638) FNNA64J3X 3 FNNA64J11X 3 FNNA64J5X 1 68 (31)
45 77 (1956) FNNA77A3X 3 FNNA77A11X 3 FNNA77A5X 3 78 (36)
Applications: Lightweight Oils, Degreasing Solutions, Heat Transfer Oils
2
23 W/in
Steel Flange 9251⁄
6 18 (457) FNS718A10 1 FNS718A3 1 FNS718A11 1 FNS718A5 1 36 (17)
2 (648) FNS725J10 1 FNS725J3 1 FNS725J11 1 FNS725J5 1 40 (18)
6-Steel 12 33 (838) FNS733A10 2 FNS733A3 1 FNS733A11 1 FNS733A5 1 43 (20)
(3.6 W/cm
2
)15401⁄
2 (1029) FNS740J10 2 FNS740J3 1 FNS740J11 1 FNS740J5 1 47 (22)
18 48 (1219) FNS748A10 2 FNS748A3 3 FNS748A11 1 FNS748A5➀ 1 52 (24)
25 64
1
⁄2 (1638) FNS764J3 2 FNS764J11 2 FNS764J5 1 57 (26)
30 77 (1956) FNS777A3 2 FNS777A11 2 FNS777A5 1 65 (30)
2
23 W/in
9 18 (457) FNS718A10X 1 FNS718A3X 1 FNS718A11X 1 FNS718A5X 1 39 (18)
Steel Flange 14 251⁄2 (648) FNS725J10X 3 FNS725J3X 1 FNS725J11X 1 FNS725J5X 1 45 (21)
9-Steel 18 33 (838) FNS733A10X 3 FNS733A3X 1 FNS733A11X 1 FNS733A5X 1 48 (22)
(3.6 W/cm2)23401⁄2 (1029) FNS740J10X 3 FNS740J3X 3 FNS740J11X 1 FNS740J5X 1 53 (24)
27 48 (1219) FNS748A10X 3 FNS748A3X 1 FNS748A11X 3 FNS748A5X 1 60 (28)
38 641⁄
2 (1638) FNS764J3X 3 FNS764J11X 3 FNS764J5X 1 68 (31)
45 77 (1956) FNS777A3X 3 FNS777A11X 3 FNS777A5X 3 78 (36)
Applications: Medium Weight Oils, Heat Transfer Oils, Liquid Paraffin
16 W/in2➂ 3131⁄2 (343) FNN713J12 1 FNN713J13 1 36 (17)
Steel Flange 4 18 (457) FNN718A12 1 FNN718A13 1 40 (18)
6-Incoloy
(2.5 W/cm2)625
16 W/in
Steel Flange 6 18 (457) FNN718A12X 1 FNN718A13X 1 45 (21)
9-Incoloy
(2.5 W/cm
®
5201⁄2 (521) FNN720J12 1 FNN720J13 1 43 (20)
1
⁄2 (648) FNN725J12 1 FNN725J13 1 47 (22)
8 33 (838) FNN733A12 1 FNN733A13 1 52 (24)
10 401⁄2 (1029) FNN740J12 1 FNN740J13 1 57 (26)
12 48 (1219) FNN748A12 1 FNN748A13 1 65 (30)
2
➂ 4.5 131⁄2 (343) FNN713J12X 1 FNN713J13X 1 39 (18)
®
7.5 201⁄2 (521) FNN720J12X 1 FNN720J13X 1 48 (22)
2
)925
1
⁄2 (648) FNN725J12X 1 FNN725J13X 1 53 (24)
12 33 (838) FNN733A12X 1 FNN733A13X 1 60 (28)
15 40
1
⁄2 (1029) FNN740J12X 1 FNN740J13X 1 68 (31)
18 48 (1219) FNN748A12X 1 FNN748A13X 1 78 (36)
240VÅ(ac) No. of 240VÅ(ac) No. of 480VÅ(ac) No. of 480VÅ(ac) No. of Weight
CONTINUED
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
352
a Stock
c Must be operated 3-phase wye
W A T L O W
Tubular and
Process Assemblies
Flange Immersion Heaters
5" 150 lb ANSI Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW
B Dimension
inch (mm) 1-Phase Circuits 3-Phase Circuits 1-Phase Circuits 3-Phase Circuits lbs (kg)
Applications: Bunker C and #6 Fuel Oils
8 W/in2➂ 5401⁄2 (1029) FNS740J12 1 FNS740J13 1 47 (22)
Steel Flange 6 48 (1219) FNS748A12 1 FNS748A13 1 52 (24)
6-Steel 8641⁄2 (1638) FNS764J12 1 FNS764J13 1 57 (26)
(1.3 W/cm2) 10 77 (1956) FNS777A12 1 FNS777A13 1 65 (30)
8 W/in2➂ 7.5 401⁄
2 (1029) FNS740J12X 1 FNS740J13X 1 53 (24)
Steel Flange 9 48 (1219) FNS748A12X 1 FNS748A13X 1 60 (28)
9-Steel 12 64
(1.3 W/cm
2
) 15 77 (1956) FNS777A12X 1 FNS777A13X 1 78 (36)
1
2 (1638) FNS764J12X 1 FNS764J13X 1 68 (31)
⁄
6" 150 lb ANSI Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW
B Dimension
inch (mm) 1-Phase Circuits 3-Phase Circuits 1-Phase Circuits 3-Phase Circuits lbs (kg)
240VÅ(ac) No. of 240VÅ(ac) No. of 480VÅ(ac) No. of 480VÅ(ac) No. of Weight
240VÅ(ac) No. of 240VÅ(ac) No. of 480VÅ(ac) No. of 480VÅ(ac) No. of Weight
Flange Heaters
Application: Clean Water
2
60 W/in
24 153⁄
Steel Flange 36 21
12-Copper 48 267⁄8 (683) FPC726R3 4 FPC726R11 3 FPC726R5 2 81 (37)
(9.3 W/cm2)6032
72 37
100 507⁄8 (1292) FPC750R5 4 100 (45)
120 603⁄8
2
60 W/in
30 153⁄8 (391) FPC715G10X 3 FPC715G3X 5 FPC715G11X 3 FPC715G5X 1 76 (35)
Steel Flange 45 213⁄8 (543) FPC721G10X 5 FPC721G3X 5 FPC721G11X 3 FPC721G5X 5 82 (38)
15-Copper 60 267⁄8 (683) FPC726R3X 5 FPC726R11X 3 FPC726R5X 5 85 (39)
(9.3 W/cm2)7532
90 37
125 50
150 603⁄8 (1534) FPC760G5X➁ 5 120 (55)
8 (391) FPC715G10 3 FPC715G3 2 FPC715G11 2 FPC715G5 1 73 (33)
3
⁄8 (543) FPC721G10 4 FPC721G3 2 FPC721G11 2 FPC721G5 1 78 (36)
3
8 (822) FPC732G3 4 FPC732G11 3 FPC732G5 2 85 (39)
⁄
7
⁄8 (962) FPC737R3 4 FPC737R5 2 92 (42)
(1534) FPC760G5➁ 4 110 (50)
3
⁄8 (822) FPC732G3X 5 FPC732G11X 5 FPC732G5X 5 90 (41)
7
⁄8 (962) FPC737R3X 5 FPC737R5X 5 98 (45)
7
⁄8 (1292) FPC750R5X 5 108 (49)
Application: Deionized Water , Demineralized Water
2
60 W/in
316 SS Flange 36 213⁄4 (552) FPR721N10 4 FPR721N3 2 FPR721N11 3 FPR721N5 1 78 (36)
12-316 SS 48 27
(9.3 W/cm
Passivated 72 381⁄4 (972) FPR738E3 4 FPR738E5 2 92 (42)
24 153⁄4 (400) FPR715N10 3 FPR715N3 2 FPR715N11 2 FPR715N5 1 73 (33)
1
(692) FPR727E3 4 FPR727E11 3 FPR727E5 2 81 (37)
2
)6032
100 51
120 60
⁄4
3
⁄4 (832) FPR732N3 4 FPR732N11 3 FPR732N5 2 85 (39)
1
(1302) FPR751E5 4 100 (46)
⁄4
3
⁄4 (1543) FPR760N5 4 110 (50)
CONTINUED
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
➁ Standard
➂ Must be operated 3-phase wye
353
Tubular and
Process Assemblies
Flange Immersion Heaters
6" 150 Lbs ANSI Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW
B Dimension
inch (mm) 1-Phase Circuits 3-Phase Circuits 1-Phase Circuits 3-Phase Circuits lbs (kg)
Application: Deionized Water , Demineralized Water
2
60 W/in
316 SS Flange 45 213⁄
15-316 SS 60 27
(9.3 W/cm
Passivated 90 381⁄
30 153⁄4 (400) FPR715N10X 3 FPR715N3X 5 FPR715N11X 3 FPR715N5X 1 76 (35)
4 (552) FPR721N10X 5 FPR721N3X 5 FPR721N11X 3 FPR721N5X 5 82 (38)
1
4 (692) FPR727E3X 5 FPR727E11X 3 FPR727E5X 5 85 (39)
2
)7532
125 51
150 60
⁄
3
⁄4 (832) FPR732N3X 5 FPR732N11X 5 FPR732N5X 5 90 (41)
4 (972) FPR738E3X 5 FPR738E5X 5 98 (45)
1
4 (1302) FPR751E5X 5 108 (49)
⁄
3
⁄4 (1543) FPR760N5X 5 120 (55)
Application: Process Water
48 W/in2➄ 18 133⁄8 (340) FPN713G10 2 FPN713G3 1 FPN713G11 1 FPN713G5 1 73 (33)
Steel Flange 24 177⁄
12-Incoloy
®
30 203⁄8 (518) FPN720G10 3 FPN720G3 2 FPN720G11 2 FPN720G5 1 78 (36)
(7.5 W/cm2)3625
48 32
60 40
72 477⁄
2
48 W/in
23 133⁄8 (340) FPN713G10X 3 FPN713G3X 5 FPN713G11X 1 FPN713G5X 1 76 (35)
8 (454) FPN717R10 3 FPN717R3 2 FPN717R11 2 FPN717R5 1 75 (34)
3
8 (645) FPN725G10 4 FPN725G3 2 FPN725G11 2 FPN725G5 1 81 (37)
⁄
7
8 (835) FPN732R3 4 FPN732R11 3 FPN732R5 2 85 (39)
⁄
3
⁄8 (1026) FPN740G3 4 FPN740G11 3 FPN740G5 2 92 (42)
8 (1216) FPN747R3 4 FPN747R5 2 100 (46)
Steel Flange 30 177⁄8 (454) FPN717R10X 3 FPN717R3X 5 FPN717R11X 3 FPN717R5X 1 78 (36)
15-Incoloy
(7.5 W/cm
®
38 203⁄
2
)4525
8 (518) FPN720G10X 5 FPN720G3X 5 FPN720G11X 3 FPN720G5X 1 82 (38)
3
⁄8 (645) FPN725G10X 5 FPN725G3X 5 FPN725G11X 3 FPN725G5X 5 85 (39)
60 327⁄8 (835) FPN732R3X 5 FPN732R11X 3 FPN732R5X 5 90 (41)
75 403⁄
90 47
8 (1026) FPN740G3X 5 FPN740G11X 5 FPN740G5X 5 98 (45)
7
(1216) FPN747R3X 5 FPN747R5X 5 108 (49)
⁄8
Applications: Forced Air and Gases, Caustic Solutions, Degreasing Solutions
23 W/in2➄➅ 12 177⁄8 (454) FPNA17R10 2 FPNA17R3 1 FPNA17R11 1 FPNA17R5 1 75 (34)
(645) FPNA25G10 2 FPNA25G3 1 FPNA25G11 1 FPNA25G5 1 81 (37)
Steel Flange 18 253⁄
12-Incoloy
®
24 327⁄8 (835) FPNA32R10 3 FPNA32R3 2 FPNA32R11 2 FPNA32R5 1 85 (39)
(3.6 W/cm2)3040
36 477⁄
50 64
60 767⁄8 (1953) FPNA76R3 4 FPNA76R11 3 FPNA76R5 2 118 (54)
2
23 W/in
15 177⁄
Steel Flange 23 25
15-Incoloy
®
30 327⁄8 (835) FPNA32R10X 3 FPNA32R3X 5 FPNA32R11X 3 FPNA32R5X 1 90 (41)
(3.6 W/cm2)3840
45 47
63 643⁄8 (1635) FPNA64G3X 5 FPNA64G11X 3 FPNA64G5X 5 120 (55)
75 767⁄
8
3
⁄8 (1026) FPNA40G10 3 FPNA40G3 2 FPNA40G11 1 FPNA40G5 1 92 (42)
(1216) FPNA47R10 4 FPNA47R3 2 FPNA47R11 2 FPNA47R5 1 100 (46)
8
3
⁄8 (1635) FPNA64G3 4 FPNA64G11 3 FPNA64G5 2 110 (50)
(454) FPNA17R10X 3 FPNA17R3X 1 FPNA17R11X 1 FPNA17R5X 1 78 (36)
8
3
⁄8 (645) FPNA25G10X 3 FPNA25G3X 5 FPNA25G11X 1 FPNA25G5X 1 85 (39)
3
8 (1026) FPNA40G10X 5 FPNA40G3X 5 FPNA40G11X 3 FPNA40G5X 1 98 (45)
⁄
7
⁄8 (1216) FPNA47R10X 5 FPNA47R3X 5 FPNA47R11X 3 FPNA47R5X 5 108 (49)
8 (1953) FPNA76R3X 5 FPNA76R11X 5 FPNA76R5X 5 131 (60)
240VÅ(ac) No. of 240VÅ(ac) No. of 480VÅ(ac) No. of 480VÅ(ac) No. of Weight
CONTINUED
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
354
➄ 240VÅ(ac) 3-phase can be rewired wye to
produce
1
⁄3 more kW and watt density
when operated at 480VÅ(ac) 3-phase.
➅ Can be rewired wye to produce 1⁄3 of the
original kW and watt density
(3-phase only).
W A T L O W
Tubular and
Process Assemblies
Flange Immersion Heaters
6" 150 lb ANSI Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW
Applications: Lightweight Oils, Degreasing Solutions, Heat Transfer Oils
2
23 W/in
Steel Flange 18 25
12-Steel 24 327⁄
(3.6 W/cm
23 W/in
2
)30403⁄
2
Steel Flange 23 253⁄
15-Steel 30 32
(3.6 W/cm
2
)38403⁄
Applications: Medium Weight Oils, Heat Transfer Oils, Liquid Paraffin
16 W/in2➂ 6133⁄
Steel Flange 817
12-Incoloy
®
(2.5 W/cm2)12253⁄
2
16 W/in
➂ 7.5 133⁄8 (340) FPN713G12X 1 FPN713G13X 1 76 (35)
Steel Flange 10 17
15-Incoloy
®
(2.5 W/cm2)15253⁄8 (645) FPN725G12X 1 FPN725G13X 1 85 (39)
Applications: Bunker C and #6 Fuel Oils
8 W/in2➂ 8327⁄8 (835) FPS732R12 1 FPS732R13 1 85 (39)
Steel Flange 10 40
12-Steel 12 47
(1.3 W/cm2)16.5643⁄8 (1635) FPS764G12 1 FPS764G13 1 110 (50)
2
8 W/in
➂ 10 327⁄8 (835) FPS732R12X 1 FPS732R13X 1 90 (41)
Steel Flange 12.5 403⁄8 (1026) FPS740G12X 1 FPS740G13X 1 98 (45)
15-Steel 15 47
(1.3 W/cm
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
2
)21643⁄8 (1635) FPS764G12X 5 FPS764G13X 1 120 (55)
B Dimension
240VÅ(ac) No. of 240VÅ(ac) No. of 480VÅ(ac) No. of 480VÅ(ac) No. of Weight
inch (mm) 1-Phase Circuits 3-Phase Circuits 1-Phase Circuits 3-Phase Circuits lbs (kg)
12 177⁄
36 47
50 643⁄
60 76
8 (454) FPS717R10 2 FPS717R3 1 FPS717R11 1 FPS717R5 1 75 (34)
3
⁄8 (645) FPS725G10 2 FPS725G3 1 FPS725G11 1 FPS725G5 1 81 (37)
8 (835) FPS732R10 3 FPS732R3 2 FPS732R11 2 FPS732R5 1 85 (39)
8 (1026) FPS740G10 3 FPS740G3 2 FPS740G11 2 FPS740G5 1 92 (42)
7
⁄8 (1216) FPS747R10 4 FPS747R3 2 FPS747R11 2 FPS747R5 1 100 (46)
8 (1635) FPS764G3 4 FPS764G11 3 FPS764G5 2 110 (50)
7
8 (1953) FPS776R3 4 FPS776R11 3 FPS776R5 2 118 (54)
⁄
15 177⁄8 (454) FPS717R10X 3 FPS717R3X 1 FPS717R11X 1 FPS717R5X 1 78 (36)
8 (645) FPS725G10X 3 FPS725G3X 5 FPS725G11X 1 FPS725G5X 1 85 (39)
7
8 (835) FPS732R10X 3 FPS732R3X 5 FPS732R11X 3 FPS732R5X 1 90 (41)
⁄
8 (1026) FPS740G10X 5 FPS740G3X 5 FPS740G11X 3 FPS740G5X 1 98 (45)
45 47
63 64
75 767⁄
7
8 (1216) FPS747R10X 5 FPS747R3X 5 FPS747R11X 3 FPS747R5X 5 108 (49)
⁄
3
⁄8 (1635) FPS764G3X 5 FPS764G11X 3 FPS764G5X 5 120 (55)
8 (1953) FPS776R3X 5 FPS776R11X 5 FPS776R5X 5 131 (60)
8 (340) FPN713G12 1 FPN713G13 1 73 (33)
7
⁄8 (454) FPN717R12 1 FPN717R13 1 75 (34)
10 203⁄8 (518) FPN720G12 1 FPN720G13 1 78 (36)
8 (645) FPN725G12 1 FPN725G13 1 81 (37)
16 32
7
⁄8 (835) FPN732R12 1 FPN732R13 1 85 (39)
20 403⁄8 (1026) FPN740G12 2 FPN740G13 1 92 (42)
24 477⁄
8 (1216) FPN747R12 2 FPN747R13 1 100 (46)
7
(454) FPN717R12X 1 FPN717R13X 1 78 (36)
⁄8
12.5 203⁄8 (518) FPN720G12X 1 FPN720G13X 1 82 (38)
7
(835) FPN732R12X 5 FPN732R13X 1 90 (41)
20 32
25 40
⁄8
3
⁄8 (1026) FPN740G12X 5 FPN740G13X 1 98 (45)
30 477⁄8 (1216) FPN747R12X 5 FPN747R13X 1 108 (49)
3
⁄8 (1026) FPS740G12 1 FPS740G13 1 92 (42)
7
⁄8 (1216) FPS747R12 1 FPS747R13 1 100 (46)
7
20 76
⁄8 (1953) FPS776R12 2 FPS776R13 1 118 (54)
7
⁄8 (1216) FPS747R12X 1 FPS747R13X 1 108 (49)
25 767⁄8 (1953) FPS776R12X 5 FPS776R13X 1 131 (60)
➂ Must be operated 3-phase wye
Flange Heaters
355
Tubular and
Process Assemblies
Flange Immersion Heaters
6" 150 lb ANSI Flange—FIREBAR Element
FIREBAR Immersed Code No. Est. Ship.
Description kW B Dimension 240V
inch (mm) 3-Phase Circuits 3-Phase Circuits lbs (kg)
Å(ac)
No. of 480V
Applications: Process Water, Ethylene Glycol (50%)
2
45 W/in
304 SS Flange 37.5 16 (406) FPNF16A27 5 81 (37)
15-Incoloy
(7 W/cm2)6022
30 133⁄8 (340) FPNF13G27 78 (36)
®
45 183⁄8 (467) FPNF18G27 5 84 (38)
7
⁄8 (581) FPNF22R27 5 FPNF22R28 5 87 (40)
75 277⁄8 (708) FPNF27R27 5 FPNF27R28 5 91 (42)
90 327⁄8 (835) FPNF32R27 5 FPNF32R28 5 95 (43)
120 423⁄8 (1076) FPNF42G28 5 106 (48)
150 517⁄8 (1318) FPNF51R28 5 116 (53)
Applications: Cooking Oils, Ethylene Glycol (100%)
30 W/in2➂ 25 161⁄2 (419) FPNF16J12 5 FPNF16J13 5 81 (37)
304 SS Flange 32 191⁄2 (495) FPNF19J12 5 FPNF19J13 5 84 (38)
15-Incoloy
(4.7 W/cm2) 52 30 (762) FPNF30A12 5 FPNF30A13 5 91 (42)
®
42 241⁄2 (622) FPNF24J12 5 FPNF24J13 5 87 (40)
64 35 (889) FPNF35A12 5 FPNF35A13 5 95 (43)
85 451⁄2 (1156) FPNF45J12 5 FPNF45J13 5 106 (48)
110 56 (1422) 5 FPNF56A13 5 116 (53)
Applications: Heat Transfer Oils, Mineral Oils, Degreasing Solutions
23 W/in2➃
304 SS Flange 24 191⁄2 (495) FPNF19J20 5 84 (38)
15-Incoloy
(3.6 W/cm2) 40 30 (762) FPNF30A20 5 FPNF30A19 5 91 (42)
19 161⁄2 (419) FPNF16J20 5 81 (37)
®
32 241⁄2 (622) FPNF24J20 5 FPNF24J19 5 87 (40)
48 35 (889) FPNF35A20 5 FPNF35A19 5 95 (43)
64 451⁄2 (1156) FPNF45J20 5 FPNF45J19 5 106 (48)
80 56 (1422) FPNF56A20 5 FPNF56A19 5 116 (53)
Applications: Medium Weight Oils, Heat Transfer Oils, Liquid Paraffin
15 W/in2➂ 10 133⁄8 (340) FPNF13G29 5 78 (36)
304 SS Flange 12.5 16 (406) FPNF16A29 5 81 (37)
15-Incoloy
(2.3 W/cm2)2022
®
15 183⁄8 (467) FPNF18G29 5 84 (38)
7
⁄8 (581) FPNF22R29 5 FPNF22R30 5 87 (40)
25 277⁄8 (708) FPNF27R29 5 FPNF27R30 5 91 (42)
30 327⁄8 (835) FPNF32R29 5 FPNF32R30 5 95 (43)
40 423⁄8 (1076) FPNF42G29 5 FPNF42G30 5 106 (48)
50 517⁄8 (1318) FPNF51R29 5 FPNF51R30 5 116 (53)
Applications: Bunker C and #6 Fuel Oils, Asphalt
8 W/in2➂ 6.3 161⁄2 (419) FPNF16J22 5 81 (37)
304 SS Flange 8.1 191⁄2 (495) FPNF19J22 5 84 (38)
15-Incoloy
(1.3 W/cm2) 13.1 30 (762) FPNF30A22 5 FPNF30A21 5 91 (42)
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
®
10.6 241⁄2 (622) FPNF24J22 5 FPNF24J21 5 87 (40)
16 35 (889) FPNF35A22 5 FPNF35A21 5 95 (43)
21.3 451⁄2 (1156) FPNF45J22 5 FPNF45J21 5 106 (48)
26 56 (1422) FPNF56A22 5 FPNF56A21 5 116 (53)
➂ Must be operated 3-phase wye.
➃ Can be rewired for 1-phase.
Å(ac)
No. of Weight
356
W A T L O W
Tubular and
Process Assemblies
Flange Immersion Heaters
8" 150 lb ANSI Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW
B Dimension
inch (mm) 1-Phase Circuits 3-Phase Circuits 1-Phase Circuits 3-Phase Circuits lbs (kg)
Application: Clean Water
2
60 W/in
50 213⁄4 (553) FRC721N3➁ 3 FRC721N11 3 FRC721N5 2 118 (54)
Steel Flange 75 293⁄4 (756) FRC729N3➁ 6 FRC729N5➁ 2 126 (58)
18-Copper 100 371⁄
(9.3 W/cm
2
) 125 451⁄4 (1149) FRC745E3➁ 6 FRC745E5➁ 6 132 (60)
150 523⁄
175 60
200 68
4 (946) FRC737E3➁ 6 FRC737E5 3 130 (59)
4 (1340) FRC752N5➁ 6 137 (63)
3
4 (1543) FRC760N5➁ 6 144 (66)
⁄
1
⁄4 (1734) FRC768E5➁ 6 149 (68)
Application: Process Water
48 W/in2➄ 50 253⁄4 (654) FRN725N3➁ 3 FRN725N11
Steel Flange 75 353⁄
18-Incoloy
®
100 441⁄4 (1124) FRN744E3 6 FRN744E5 3 132 (60)
(7.5 W/cm2) 125 5411⁄
150 63
175 73
200 8211⁄
2
48 W/in
4 (908) FRN735N3➁ 6 FRN735N5➁ 2 130 (59)
16 (1389) FRN754M3➁ 6 FRN754M5➁ 6 140 (64)
11
16 (1617) FRN763M5➁ 6 145 (66)
⁄
3
⁄16 (1859) FRN773D5 6 151 (69)
16 (2100) FRN782M5➁ 6 157 (72)
67 263⁄16 (665) FRN726D3X➁ 4 FRN726D11X➁ 3 FRN726D5X➁ 2 129 (59)
Steel Flange 100 363⁄16 (919) FRN736D3X➁ 8 FRN736D5X➁ 4 142 (65)
24-Incoloy®133 4411⁄
(7.5 W/cm
2
) 167 5411⁄16 (1389) FRN754M3X➁ 8 FRN754M5X➁ 8 158 (72)
16 (1135) FRN744M3X➁ 8 FRN744M5X➁ 4 147 (67)
200 6311⁄16 (1618) FRN763M5X➁ 8 166 (76)
233 733⁄
267 82
16 (1859) FRN773D5X 8 175 (80)
11
(2100) FRN782M5X➁ 8 184 (84)
⁄16
Application: Forced Air and Gases, Caustic Solutions, Degreasing Solutions
(832) FRNA32N10➁ 3 FRNA32N3➁ 2 FRNA32N11➁ 2 FRNA32N5➁ 1 130 (59)
23 W/in2➄➅ 30 323⁄
Steel Flange 40 43
18-Incoloy
®
(3.6 W/cm2)
2
23 W/in
Steel Flange 53 4311⁄16 (1110) FRNA43M3X➁ 4 FRNA43M11X➁ 3 FRNA43M5X➁ 2 147 (67)
24-Incoloy
(3.6 W/cm
®
2
)
4
1
⁄4 (1099) FRNA43E3➁ 3 FRNA43E11➁ 2 FRNA43E5➁ 2 132 (60)
50 5111⁄16 (1313) FRNA51M3 3 FRNA51M11 3 FRNA51M5 2 137 (63)
40 333⁄16 (843) FRNA33D10X➁ 4 FRNA33D3X➁ 4 FRNA33D11X➁ 2 FRNA33D5X➁ 2 142 (65)
(1313) FRNA51M3X➁ 4 FRNA51M11X➁ 3 FRNA51M5X➁ 2 154 (70)
16
67 5111⁄
240VÅ(ac) No. of 240VÅ(ac) No. of 480VÅ(ac) No. of 480VÅ(ac) No. of Weight
➁
3 FRN725N5➁ 2 121 (55)
CONTINUED
Flange Heaters
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
Truck Shipment only
b Standard
e 240VÅ(ac) 3-phase can be rewired wye to
1
more kW and watt density when
produce
⁄3
operated at 480VÅ(ac) 3-phase.
➅ Can be rewired wye to produce 1⁄3 of the
original kW and watt density
(3-phase only).
357
Tubular and
Process Assemblies
Flange Immersion Heaters
8" 150 lb ANSI Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW
Applications: Lightweight Oils, Degreasing Solutions, Heat Transfer Oils
2
23 W/in
Steel Flange 40 43
18-Steel 50 5111⁄
(3.6 W/cm
23 W/in
2
)60623⁄
2
Steel Flange 53 43
24-Steel 67 5111⁄
(3.6 W/cm
2
)80623⁄
107 79
Applications: Medium Weight Oils, Heat Transfer Oils, Liquid Paraffin
16 W/in2➂ 17 253⁄
Steel Flange 25 35
18-Incoloy®33 441⁄
(2.5 W/cm
2
)425411⁄16 (1389) FRN754M12➁ 3 FRN754M13➁ 2 140 (64)
16 W/in2➂ 23 263⁄16 (665) FRN726D12X➁ 2 FRN726D13X➁ 1 129 (59)
Steel Flange 33 363⁄
24-Incoloy
(2.5 W/cm
®
2
)565411⁄16 (1389) FRN754M12X➁ 4 FRN754M13X➁ 2 158 (72)
Applications: Bunker C and #6 Fuel Oils
8 W/in2➂ 12.5 431⁄4
Steel Flange 16.5 51
18-Steel 20 623⁄16 (1580) FRS762D12➁ 2 FRS762D13➁ 1 145 (66)
(1.3 W/cm
8 W/in2➂ 17 4311⁄16 (1110) FRS743M12X➁ 1 FRS743M13X➁ 1 147 (67)
Steel Flange 22 51
24-Steel 27 62
(1.3 W/cm2)327011⁄16 (1796) FRS770M12X➁ 2 FRS770M13X
2
)247011⁄16 (1795) FRS770M12 2 FRS770M13 1 151 (69)
B Dimension
240VÅ(ac) No. of 240VÅ(ac) No. of 480VÅ(ac) No. of 480VÅ(ac) No. of Weight
inch (mm) 1-Phase Circuits 3-Phase Circuits 1-Phase Circuits 3-Phase Circuits lbs (kg)
30 323⁄
70 70
80 7911⁄
40 333⁄
93 70
4 (832) FRS732N10➁ 3 FRS732N3➁ 2 FRS732N11➁ 2 FRS732N5➁ 1 130 (59)
1
⁄4 (1099) FRS743E3➁ 3 FRS743E11➁ 2 FRS743E5 2 132 (60)
16 (1313) FRS751M3 3 FRS751M11 3 FRS751M5 2 137 (63)
16 (1580) FRS762D3➁ 6 FRS762D11➁ 3 FRS762D5➁ 2 154 (70)
11
⁄16 (1795) FRS770M3➁ 6 FRS770M11 6 FRS770M5 2 160 (73)
16 (2024) FRS779M3➁ 6 FRS779M5➁ 3 172 (78)
16 (843) FRS733D10X➁ 4 FRS733D3X➁ 4 FRS733D11X➁ 2 FRS733D5X➁ 2 142 (65)
11
⁄16 (1110) FRS743M3X➁ 4 FRS743M11X➁ 3 FRS743M5X➁ 2 147 (67)
16 (1313) FRS751M3X➁ 4 FRS751M11X➁ 3 FRS751M5X➁ 2 154 (70)
16 (1580) FRS762D3X➁ 8 FRS762D11X➁ 4 FRS762D5X➁ 4 166 (76)
11
16 (1796) FRS770M3X➁ 8 FRS770M11X➁ 6 FRS770M5X➁ 4 175 (80)
⁄
11
16 (2024) FRS779M3X➁ 8 FRS779M5X➁ 4 181 (82)
⁄
4 (654) FRN725N12➁ 1 FRN725N13➁ 1 121 (55)
3
⁄4 (908) FRN735N12➁ 2 FRN735N13➁ 1 130 (59)
4 (1124) FRN744E12➁ 2 FRN744E13 1 132 (60)
50 6311⁄16 (1618) FRN763M13➁ 2 145 (66)
58 733⁄
67 82
44 4411⁄
16 (1859) FRN773D13 2 151 (69)
11
⁄16 (2100) FRN782M13➁ 2 157 (72)
16 (919) FRN736D12X➁ 2 FRN736D13X➁ 1 142 (65)
16 (1135) FRN744M12X➁ 4 FRN744M13X➁ 2 147 (67)
67 6311⁄16 (1618) FRN763M13X➁ 2 166 (76)
77 733⁄16 (1859) FRN773D13X➁ 2 175 (80)
11
89 82
⁄16 (2100) FRN782M13X➁ 4 184 (84)
(1099) FRS743E12➁ 1 FRS743E13➁ 1 132 (60)
11
⁄16 (1313) FRS751M12 1 FRS751M13 1 137 (62)
27 79
36 79
11
⁄16 (2024) FRS779M12➁ 2 FRS779M13➁ 1 155 (71)
11
⁄16 (1313) FRS751M12X➁ 2 FRS751M13X➁ 1 154 (70)
3
⁄16 (1580) FRS762D12X➁ 2 FRS762D13X➁ 1 166 (76)
11
⁄16 (2024) FRS779M12X➁ 2 FRS779M13X
➁
➁
1 175 (80)
1 181 (82)
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
Truck Shipment only
358
➁ Standard
➂ Must be operated 3-phase wye
W A T L O W
Tubular and
Process Assemblies
Flange Immersion Heaters
10" 150 lb ANSI Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW B Dimension 240VÅ(ac) No. of 480VÅ(ac) No. of Weight
Application: Process Water
48 W/in2➄ 190 543⁄
Steel Flange 262 73
27-Incoloy
®
(7.5 W/cm2)
Applications: Forced Air and Gases, Caustic Solutions, Degreasing Solutions
23 W/in2➄➅ 45 331⁄
Steel Flange 60 43
27-Incoloy
(3.6 W/cm
®
2
)
Applications: Lightweight Oils, Degreasing Solutions, Heat Transfer Oils
2
23 W/in
Steel Flange 60 433⁄4 (1111) FSS743N3➁ 3 FSS743N5➁ 3 195 (89)
27-Steel 75 513⁄
(3.6 W/cm
2
)9062
Applications: Medium Weight Oils, Heat Transfer Oils, Liquid Paraffin
16 W/in2➂ 63 543⁄
Steel Flange 75 63
27-Incoloy
(2.5 W/cm
®
2
)
Applications: Bunker C and #6 Fuel Oils
8 W/in2➂ 25 513⁄
Steel Flange 30 621⁄4
27-Steel 35 70
(1.3 W/cm2)4078
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
Truck Shipment only
inch (mm) 3-Phase Circuits 3-Phase Circuits lbs (kg)
4 (1391) FSN754N5➁ 9 240 (109)
1
⁄4 (1861) FSN773E5 9 260 (118)
4 (845) FSNA33E3➁ 3 FSNA33E5➁ 3 165 (75)
3
⁄4 (1111) FSNA43N3➁ 3 FSNA43N5➁ 3 195 (89)
4 (1314) FSNA51N3 9 FSNA51N5 3 230 (105)
75 513⁄
45 331⁄4 (845) FSS733E3➁ 3 FSS733E5➁ 3 165 (75)
4 (1314) FSS751N3 9 FSS751N5 3 230 (105)
1
⁄4 (1581) FSS762E5➁ 3 250 (114)
105 703⁄
120 78
4 (1797) FSS770N5 3 258 (117)
3
4 (2000) FSS778N5➁ 3 265 (121)
⁄
4 (1391) FSN754N13➁ 3 240 (109)
3
⁄4 (1619) FSN763N13➁ 3 250 (114)
4 (1861) FSN773E13 3 258 (117)
87 731⁄
4 (1314) FSS751N12 3 FSS751N13 1 230 (105)
(1581) FSS762E12➁ 3 FSS762E13➁ 1 250 (114)
3
⁄4 (1797) FSS770N12 3 FSS770N13 1 258 (117)
3
⁄4 (2000) FSS778N12➁ 3 FSS778N13➁ 1 265 (121)
➁ Standard
➂ Must be operated 3-phase wye.
➄ 240VÅ(ac) 3-phase can be rewired wye
to produce 1⁄3 more kW and watt density
when operated at 480VÅ(ac) 3-phase.
➅
Can be rewired wye to produce 1⁄3 of the
original kW and watt density
(3-phase only).
Flange Heaters
359
Tubular and
Process Assemblies
Flange Immersion Heaters
12" 150 lb ANSI Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW B Dimension 240VÅ(ac) No. of 480VÅ(ac) No. of Weight
Application: Process Water
2
48 W/in
Steel Flange 350 73
36-Incoloy
®
(7.5 W/cm2)
Applications: Forced Air and Gases, Caustic Solutions, Degreasing Solutions
2
23 W/in
Steel Flange 80 43
36-Incoloy
(3.6 W/cm
®
2
)
Applications: Lightweight Oils, Degreasing Solutions, Heat Transfer Oils
2
23 W/in
Steel Flange 80 435⁄8 (1108) FTS743L5➁ 3 240 (109)
36-Steel 100 515⁄
(3.6 W/cm
2
) 120 621⁄8 (1578) FTS762C5➁ 3 285 (130)
Applications: Medium Weight Oils, Heat Transfer Oils, Liquid Paraffin
16 W/in2➂ 83 545⁄
Steel Flange 117 73
36-Incoloy
®
(2.5 W/cm2)
Applications: Bunker C and #6 Fuel Oils
8 W/in2➂ 34 515⁄8 (1311) FTS751L12➁ 2 FTS751L13 1 280 (127)
Steel Flange 40 62
36-Steel 47 70
(1.3 W/cm2)5478
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
Truck Shipment only
inch (mm) 3-Phase Circuits 3-Phase Circuits lbs (kg)
250 545⁄
100 515⁄
8 (1387) FTN754L5➁ 6 280 (127)
1
⁄8 (1857) FTN773C5 12 291 (132)
8 (841) FTNA33C5➁ 3 205 (93)
60 331⁄
5
⁄8 (1108) FTNA43L5➁ 3 240 (109)
8 (1311) FTNA51L5 3 280 (127)
60 331⁄8 (841) FTS733C5➁ 3 205 (93)
8 (1311) FTS751L5 3 280 (127)
140 705⁄
160 78
8 (1794) FTS770L5 4 290 (132)
5
8 (1997) FTS778L5➁ 4 300 (136)
⁄
8 (1387) FTN754L13➁ 3 280 (127)
1
⁄8 (1857) FTN773C13➁ 3 291 (132)
1
(1578) FTS762C12➁ 2 FTS762C13➁ 1 285 (130)
⁄8
5
⁄8 (1794) FTS770L12➁ 3 FTS770L13 2 290 (132)
5
⁄8 (1997) FTS778L12➁ 3 FTS778L13➁ 2 300 (136)
➁ Standard
➂ Must be operated 3-phase wye.
360
W A T L O W
Tubular and
Process Assemblies
Flange Immersion Heaters
14" 150 lb ANSI Flange—WATROD Element
WATROD Immersed Code No. Est. Ship.
Description kW B Dimension 240VÅ(ac) No. of 480VÅ(ac) No. of Weight
Application: Process Water
2
48 W/in
Steel Flange 375 63
45-Incoloy
®
(7.5 W/cm2)
Applications: Forced Air and Gases, Caustic Solutions, Degreasing Solutions
2
23 W/in
Steel Flange 100 431⁄2 (1105) FWNA43J5➁ 3 255 (116)
45-Incoloy
(3.6 W/cm
®
2
)
Applications: Lightweight Oils, Degreasing Solutions, Heat Transfer Oils
2
23 W/in
Steel Flange 100 431⁄2 (1105) FWS743J5➁ 3 255 (116)
45-Steel 125 511⁄
(3.6 W/cm
2
) 150 62 (1575) FWS762A5➁ 5 310 (141)
Applications: Medium Weight Oils, Heat Transfer Oils, Liquid Paraffin
16 W/in2➂ 105 541⁄
Steel Flange 125 63
45-Incoloy
®
(2.5 W/cm2)
Applications: Bunker C and #6 Fuel Oils
8 W/in2➂ 42 511⁄2 (1308) FWS751J12 3 FWS751J13 3 300 (136)
Steel Flange 50 62 (1575) FWS762A12➁ 3 FWS762A13➁ 3 310 (141)
45-Steel 60 70
(1.3 W/cm
All flange immersion heaters are Assembly
Stock unless otherwise noted.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven working days
Standard: 10 working days, depending on
size
2
)6778
Truck Shipment only
inch (mm) 3-Phase Circuits 3-Phase Circuits lbs (kg)
315 541⁄
2 (1384) FWN754J5➁ 15 300 (136)
1
2 (1613) FWN763J5➁ 15 310 (141)
⁄
75 33 (838) FWNA33A5➁ 3 225 (102)
125 511⁄
2 (1308) FWNA51J5 5 300 (136)
75 33 (838) FWS733A5➁ 3 225 (102)
2 (1308) FWS751J5 5 300 (136)
175 701⁄2 (1791) FWS770J5 5 318 (145)
200 781⁄
2 (1994) FWS778J5➁ 5 330 (150)
2 (1384) FWN754J13➁ 3 300 (136)
1
⁄2 (1613) FWN763J13➁ 5 310 (141)
1
⁄2 (1791) FWS770J12 3 FWS770J13 3 318 (144)
1
⁄2 (1994) FWS778J12➁ 5 FWS778J13➁ 3 330 (150)
➁
Standard
➂
Must be operated 3-phase wye.
Flange Heaters
361
Tubular and
Process Assemblies
Flange Immersion Heaters
Build-a-Code
Flange Immersion
Heater Base Code Number➀
(Includes general purpose enclosure without thermostat)
Terminal Enclosure Type
S = General purpose (NEMA 1)
W = Moisture resistant (NEMA 4)
E = Explosion resistant (NEMA 7)
E/W = Explosion/moisture resistant (NEMA 7/4)
Thermostatb
Thermocouplec
J = Type J
K = Type K
F.O.B.: Hannibal, Missouri
-
-
-
a Flange immersion heaters are supplied with a standard, general purpose (NEMA 1) terminal enclosure. A
thermostat will not fit the standard general purpose terminal enclosure on 2, 2
b Code numbers are shown on the Thermostat stock chart on page 425. Check the temperature sensing bulb
O.D. to be certain it will fit into the thermowell’s I.D.
c Specify Type J or K thermocouple. If overtemp thermocouple specify orientation horizontal, vertical up or
vertical down.
How to Order
To order a stock flange heater,
please specify:
• Watlow code number
• Flange size and material
• Volts/watts
• Phase
• Options
• Quantity
If the flange immersion heater is to
be configured with options, add the
suffix letter(s) to the base flange
heater code number, as indicated
on the Build-a-Code chart.
If our stock units do not meet your
application needs, Watlow will
make-to-order.
For made-to-order units please
specify:
• Application, including media
heated, flow rate, pressure, and
process operating temperatures
• Volts/watts
• Watt density
• Phase
• Number of circuits
• Number of heating elements
• Element diameter (WATROD only)
• Immersed (‘B’ dimension) length
• Flange size, rating and material
• No-heat section below the flange
• Ter minal enclosure type
• Options
• Quantity
1
⁄2 and 3 inch flange sizes.
Availability
Stock: Same day shipment
Assembly Stock: Five to seven
working days
Modified Stock
➂: Five to seven
working days
Standard: 10 working days
Made-to-Order: Five to seven weeks
Options, complexity and quantity
may affect availability and lead
times. Consult factory.
➂ Stock or Assembly Stock units with
catalog options.
362
W A T L O W
Tubular and
Tubular and
Process Assemblies
Process Assemblies
Square Flange
Immersion Heaters
Designed for use in boilers and
industrial storage tanks, square
flange immersion heaters offer an
energy efficient solution to heating
water, oils and degreasing solutions.
Consisting of WATROD or
FIREBAR®elements brazed, staked,
or welded to a four- or six-bolt
flange, these heaters mount directly
to a mating flange that is welded to
a tank wall or nozzle.
Installation and maintenance is
easy. Heater change-out is also
simple … unbolt the flange and
replace it with another ... without
extensive equipment downtime.
Performance Capabilities
• Watt densities to 100 W/in
(15.5 W/cm2)
• Wattages to 24kW
• Voltages to 480VÅ(ac)
• Incoloy®sheath temperatures to
1600°F (870°C)
Features and Benefits
• 21⁄2,31⁄8 and 41⁄2 inch square
flanges easily adapt to
application needs.
Flange materials:
WATROD Steel
304 stainless steel
FIREBAR Steel
Brass
2
Mating
Flange
Threaded Terminals
Pressure Tight
Construction
WATROD
Heating Element
• Asbestos-free gaskets come
wire-tied to each flange. Spare
gaskets also available.
• Epoxy or silicone resin seals,
rated to 250°F (120°C) or 390°F
(200°C) respectively, protect
elements against moisture and
other contaminants.
• WATROD hairpins are
repressed (recompacted) to
maintain MgO density, dielectric
strength, heat transfer and life.
On stock chart units:
• Same day on most heaters
• 10 working days on special voltages and/or
wattages
• 15 working days on special element lengths
®
• UL
and CSA component
recognition under file numbers
E52951 and 31388 respectively.
See pages 268 to 271 for details.
Applications
• Water
• Boiler equipment
• Vapor degreasers
• Fuel oils
• Heat transfer fluids
• Caustic solutions
Flange Heaters
Available on request:
• Sheath materials in copper,
steel, 304 and 316 stainless steel
and titanium
• Flange materials in titanium and
316 stainless steel
• Flange sizes to meet specific
application needs
• External finishes such as
passivation, belt polishing and
glass beading
• Other voltage and wattage
ratings
Consult your Watlow
representative for details.
363
Loading...