Watlow Circulation Heater Data sheet
W A T L O W
Tubular and
Process Assemblies
Circulation Heaters
Circulation heaters provide a readymade means to install electric
heating with a minimal amount of
time and labor. This is
accomplished by combining
heating elements, vessel, insulation,
terminal enclosure, mounting
brackets and inlet and outlet
connections into a complete
assembly.
Made from NPT screw plug or ANSI
flange heater assemblies mated
with a pressure vessel (tank),
circulation heaters are designed to
heat forced-circulation air, gases or
liquids. Ideal for either in-line or
side-arm operations, these
assemblies direct fluids past
FIREBAR
elements, to deliver fast response
and even heat distribution.
Watlow can meet virtually all your
circulation heater assembly needs
with made-to-order units. Made-toorder units can be made from a
wide range of heating element
sheath materials, wattages, vessel
sizes and materials, pressure
ratings, terminal enclosures and
controls.
Performance Capabilities
• Watt densities to 120 W/in
(18.6 W/cm2)
• Wattages to one megawatt
•UL
recognition to 480VÅ(ac) and
600VÅ(ac) respectively
• Ratings to 600 lb pressure class
• Incoloy®sheath temperatures to
1600°F (870°C)
• Passivated 316 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)
®
or WATROD heating
®
and CSA component
2
Features and Benefits
• Standard screw plugs and
flanges feature a wide selection
of WATROD and FIREBAR
elements to meet specific
application requirements.
Type Sizes (inch)
NPT 1
Screw Plugs
ANSI flanges 3, 4, 5, 6, 8, 10, 12, 14
1
⁄4, 21⁄2
• Flange ratings meet recognized
agency standards. ANSI B16.5
Class 150 on:
Four or six inch FIREBAR
element flanges
Three to 14 inch WATROD
element flanges
• FIREBAR assemblies pack
more wattage in a smaller heater
bundle—replaces larger flanges
with round tubular elements, with
a smaller package.
• Compacted MgO insulation
filled elements maximize
dielectric strength, heat transfer
and life.
• One inch (25 mm) thermal
insulation, rated to 750°F
(400°C), reduces heat loss from
the vessel.
On stock chart units:
• Five to seven working days on all Assembly Stock
heaters
• 10 working days on special voltages and/or
wattages
• 15 working days on special element lengths
Flange
Assembly
Threaded
Pipe Outlet
Jacket
1" (25 mm)
Insulation
Threaded
Pipe Inlet
Gasket
Mounting
Lugs
Pressure
Vessel
• Heavy-gauge steel jacket
(shroud) protects thermal
insulation and heating vessel.
Comes with protective primer
coating.
• All catalog units rated to ANSI
pressure Class 150. Pressure
vessels (tanks) are either carbon
or 316 stainless steel.
• NPT or ANSI Class 150 nozzle
connections make installation
easy. Inlet and outlet nozzle
connections are:
Threaded MNPT on eight inch
and smaller tanks
Class 150 flanged connections
on 10 inch and larger tanks
Circulation Heaters
UL®is a registered trademark of
Underwriter's Laboratories, Inc.
Incoloy®is a registered trademark of
Special Metals Corporation.
367
Tubular and
Ref
T
Process Assemblies
Circulation Heaters
Features and Benefits
• Mounting lugs are welded onto
the tank wall of all 21⁄2
and larger units. Lugs are flush
with outer insulation jacket and
provide mounting support.
Applications
• Water:
Deionized
Demineralized
Clean
Potable
Process
Options
Terminal Enclosures
General purpose (NEMA 1) terminal
enclosures, without thermostats, are
supplied on all Watlow circulation
heaters. Moisture and explosion
resistant ratings are available to
meet specific application needs. For
screw plug terminal enclosures,
inch NPT
• Flange mounting holes straddle
centerline to comply with industry
standards.
• Standard, general purpose
(NEMA 1) terminal enclosures
offer easy access to terminal
wiring.
• Industrial water rinse tanks
• Hydraulic oil, crude, asphalt
• Lubricating oils at API specified
watt densities
• Heat transfer oil
refer to pages 322 to 324. For
flange terminal enclosures, refer to
pages 340 to 341.
Stand-off Terminal Enclosures
Stand-off terminal enclosures help
protect terminal enclosures against
excessive temperatures. For details,
refer to page 340.
®
• UL
and CSA component
recognition under file numbers
E52951 and 31388 respectively.
See pages 268 to 271 for details.
• Branch circuits are subdivided
by National Electric Code (NEC)
requirements to a maximum of
48 amps per circuit.
• Paraffin
• Caustic cleaners
• Nitrogen, hydrogen and other
air/gas systems
• Superheating steam
CSA Certified Enclosures
To meet agency recognition
requirements, CSA certified
moisture and/or explosion resistant
terminal enclosures are available.
Consult your Watlow representative
for details.
Thermostats
To provide process temperature
control, Watlow offers optional
single and double pole thermostats.
Process Thermocouple in Nozzle
(Must specify which nozzle)
Thermostats are typically mounted
in the terminal enclosure. Optional
side mounting on vessel also
available.
Thermocouples
To sense process or element sheath
temperature, ASTM Type J or K
thermocouples are available.
Ref. Ref. Dimension
Tank Size Nozzle Size "A"
1
1
⁄4
2 1⁄2
3 1 NPT 8 3⁄16
41
5 2 NPT 11 1⁄16
62
82
For 10 inch and larger tanks consult factory for dimension.
3
⁄4 NPT 8 3⁄16
1 NPT 8
1
⁄2 NPT 10 3⁄8
1
⁄2 NPT 13 3⁄8
1
⁄2 NPT 14 3⁄8
See Screw Plug Immersion
Heaters, page 324, and Flange
Immersion Heaters, on page 342
for details.
See Screw Plug Immersion
Heaters, page 325 and Flange
Immersion Heaters, on page 342
for details.
3
⁄16
368
W A T L O W
Tubular and
Process Assemblies
Circulation Heaters
Options
Continued
Branch Circuits
Branch circuits are subdivided by
National Electrical Code (NEC)
requirements to a maximum of
Wattages and Voltages
Watlow routinely supplies circulation
heaters with 120 to 480VÅ(ac) as
well as wattages from 500 watts to
one megawatt. If required, Watlow
will configure circulation heaters
48 amps per circuit. Consult factory
for circuit requirements other than
those listed in the stock charts.
with voltages and wattages outside
these parameters.
For more information on special
voltage and wattage configurations,
consult your Watlow representative.
Circulation Heaters
Sheath Materials
The following sheath materials are
available on WATROD and
FIREBAR heating elements:
Baffles
Direction of Flow
Pressure Vessels
All standard pressure vessel (tank)
materials are rated to 150 lb and
made from:
• Carbon steel
• 316 stainless steel
All catalog pressure vessels (tanks)
are steel unless otherwise noted.
Standard Sheath Materials
WATROD Incoloy
FIREBAR Incoloy
®
316 stainless steel
Steel
Copper
®
Baffles mounted on the heating
element bundle enhance and/or
modify liquid or gas flow for better
heat transfer.
316 stainless steel pressure
vessels (tanks) are passivated on all
wetted surfaces. Available from
Assembly Stock on 2
1
⁄2 inch NPT
and four or six inch ANSI flange
circulation heaters.
Made-to-order units can be made in
a variety of materials, flange sizes
and pressure classes.
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.
For critical sheath temperature and
low flow conditions, baffles may be
required.
Consult your Watlow representative
for details.
To order, specify pressure
vessel (tank) size, material and
pressure class.
ANSI ratings to 600 lb are available
for high-pressure applications. For
pressure class ratings above
600 lb, as well as other vessel
materials, consult Watlow Process
Systems in Troy, Missouri.
Monel®is a registered trademark of
Special Metals Corporation.
Passivated Finish
For critical applications, passivation
will remove free iron from all wetted
surfaces.
Consult factory for details.
369
Tubular and
Process Assemblies
Circulation Heaters
Options
ontinued
C
Gaskets
Rubber, asbestos-free and spiral
wound gaskets are available for all
heater flange, and inlet and outlet
flange sizes.
Watlow recommends ordering
spares in case replacement
becomes necessary.
and Outlet Nozzle Connections
Inlet
All inlet and outlet materials are
compatible with the pressure vessel
material and pressure class rating.
Vessel sizes from 11⁄4 to eight inches
are typically configured with MNPT
(Male National Pipe Thread)
nozzles. Optional NPT and flange
sizes can be supplied to mate with
existing piping.
To order, specify gasket type,
flange size/rating and process
operating temperature.
For details on gasket materials and
temperature ratings, see page 343.
10 inch and larger vessels are
supplied with Class 150 inlet and
outlet flanges. Optional Class 300 or
Class 600 can be provided to mate
with existing piping.
To order, specify type, size and
pressure class rating for both inlet
and outlet nozzle/flange
connections.
High Temperature Thermal Insulation
To further minimize heat loss, the
pressure vessel’s standard one inch
thermal insulation wrap may be
replaced with thicker or higher
temperature insulation. For more
information, consult your Watlow
representative.
Protective Steel Jacket (Shroud)
To protect circulation heaters from
weather or wash-down conditions,
fully welded (weatherproof) or
partially welded (standard) outer
protective steel jackets are
available. Standard steel, or madeto-order 304 or 316 stainless steel
Support Saddles
To mate with an existing installation,
customized support saddle(s)
and/or mounting lugs are available.
To order, specify insulation
thickness, standard or high
temperature insulation and
temperature rating.
Vessels may be supplied with a
primer coating without insulation.
To order, specify no insulation.
can be supplied. Jacket diameter is
dependent upon thermal insulation
thickness.
To order, specify protective steel
jacket, material type and
weatherproof, if desired.
To order, specify mounting lugs or
support saddles and supply a
dimensional drawing.
370
W A T L O W
Tubular and
Process Assemblies
Circulation Heaters
Maximum V elocities
The rate at which a gas or liquid
flows through inlet and outlet pipes
is critical to maintaining the desired
output temperature. Pressure drop
through the circulation heater must
be considered to properly size
blowers or pumps. The Maximum
Velocity to Avoid Excessive
Pressure Drop chart gives
recommended maximum velocities,
in feet per second and meters per
second of gas or liquid being
heated and nominal pipe size.
Vessel Orientation
Guidelines
Correctly orienting the heating
vessel assures lower terminal
enclosure temperatures and
element immersion. Detailed
instructions on vessel orientation are
contained in the Installation and
Maintenance Instructions that
accompanies all circulation heaters.
The following are guidelines for
vessel orientation in liquid and gas
heating applications.
Maximum Velocity to Avoid Excessive Pressure Drop
Fluid Nominal Pipe Size Maximum Velocity
inch ft/sec (m/sec)
Gases All 200 (61.0)
Liquid 4 and smaller 10 (3.0)
Liquid 6-8 15 (5.0)
Liquid 10-12 19 (6.0)
Liquid 14-16 21 (6.4)
Liquid 18-20 23 (7.0)
Liquid 24 24 (7.3)
Liquids
Orient circulation heater:
• Horizontally with inlet and outlet
pipes pointing up
• Vertically with the terminal
enclosure up and the inlet pipe
on the bottom
These orientations ensure the
heating elements will be immersed
at all times and help prevent
premature failure.
Air or Gases
Orient circulation heater:
• Horizontally with the inlet nozzle
closest to the terminal enclosure.
• Vertically with terminal enclosure
at the bottom of the tank. Use the
nozzle nearest the bottom as the
inlet connection.
If installation constraints do not
allow mounting in accordance with
these guidelines, consult your
Watlow representative.
Circulation 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 type and material,
consult your Watlow
representative.
• Assure selecting proper vessel by
considering the pressure or flow
rate, process temperature and
corrosiveness of the media being
heated. If assistance with vessel
selection is required, consult your
Watlow representative.
• For maintenance/replacement
procedures, retain an area twice
the circulation heater’s overall
length to permit easy removal
and inspection of screw plug or
flange heater assemblies.
• Choose a FIREBAR assembly
when you require:
A smaller package
More kilowatts or lower watt
density in an equally sized
WATROD circulation tank.
• Minimize problems associated
with low flow or low liquid level
conditions with a low liquid level
sensor and/or sheath high-limit
control.
• Ensure wiring integrity by making
sure terminal enclosure
temperature does not exceed
400°F (205°C).
• Protect against electrical shock
by properly grounding the unit
per NEC requirements.
• One or more circulation heaters
may be connected in series to
achieve the desired total kilowatt
or temperature output.
371
Tubular and
3
3
/4
"
(95 mm)
4
"
(100 mm)
Ref
A
Ref
6
7
/16
"
(164 mm)
3
/4
"
NPT Inlet & Outlet
B
Ref
3
1
/8
"
(79 mm)
Ref
C
1
/2
"
NPT
Process Assemblies
Circulation Heaters
Replacement Heater Assemblies
To help assure minimum process
downtime, it’s advisable to order
and keep on hand a replacement
flange or screw plug heater
assembly.
1
1
4" NPT
⁄
" NPT Screw Plug—WATROD Element
11⁄4
WATROD Code No. Est. Ship.
Description kW Fig. 120/240VÅ(ac) 240VÅ(ac) Weight
No. 1-Phase 1-Phase lbs (kg)
Application: Clean Water
60 W/in2➃ 3.0 1.1 CBEC15A6 23 (11)
Steel Tank 4.0 1.1 CBEC19A10 29 (14)
2-Copper 5.0 1.2 CBEC23J10 29 (14)
(9.3 W/cm2) 6.0 1.2 CBEC27J10 31 (14)
Applications: Forced Air and Gases, Caustic Solutions, Degreasing Solutions
23 W/in2➃ 1.0 1.1 CBEN13G6 21 (10)
Steel Tank 1.5 1.1 CBEN19A6 29 (14)
2-Incoloy
(3.6 W/cm
®
2.0 1.2 CBEN24G6 29 (14)
2
)
Applications: Lightweight Oils, Degreasing Solutions, Heat Transfer Oils
23 W/in2➃ 1.5 1.1 CBES19G6 29 (14)
Steel Tank 2.0 1.2 CBES25G6 29 (14)
2-Steel
(3.6 W/cm2)
All circulation heaters are Assembly Stock
unless otherwise noted.
Availability
Assembly Stock: Five to seven working days
Standard: 10 working days
Spare and/or replacement screw
plug or flange heaters can be
ordered by simply providing the
Fig. A Dimension B Dimension C Dimension
No. in (mm) in (mm) in (mm)
1.1 245⁄
1.2 32
1.3 425⁄8 (1083) 32 (813) 4 (102)
1.4 635⁄
➃ Wired for higher voltage.
F.O.B.: Hannibal, Missouri
complete circulation heater code
number and specifying
“replacement heater only.”
8 (625) 15 (381) 3
5
⁄8 (829) 23 (584) 3 (76)
8 (1616) 53 (1346) 4 (102)
1
8 (79)
⁄
372
W A T L O W
Tubular and
Process Assemblies
Circulation Heaters
11⁄4" NPT Screw Plug—FIREBAR Element
FIREBAR Code No. Est. Ship.
Description kW Fig. 240VÅ(ac) 240VÅ(ac) 480VÅ(ac) 480VÅ(ac) Weight
No. 1-Phase 3-Phase 1-Phase 3-Phase lbs (kg)
Applications: Clean and Potable Water
90 W/in2➇ 1.5 1.1 CBDNF7R10bg CBDNF7R11bg 26 (12)
Steel Tank 3.0 1.1 CBDNF11G10bg CBDNF11G11b 26 (12)
1-Incoloy
(14 W/cm
Applications: Process Water, Ethylene Glycol (50%)
45 W/in2➇ 2.0 1.1 CBDNF13A27 25 (12)
Steel Tank 2.5 1.1 CBDNF15J27 26 (12)
1-Incoloy
(7 W/cm2) 4.0 1.2 CBDNF22J27 CBDNF22J28 31 (14)
Applications: Cooking Oils, Ethylene Glycol (100%)
30 W/in2➂ 1.7 1.1 CBDNF16G12 CBDNF16G13 26 (12)
Steel Tank 2.2 1.2 CBDNF19G12 CBDNF19G13 30 (14)
1-Incoloy
(4.7 W/cm2) 3.5 1.3 CBDNF29R12 CBDNF29R13 43 (20)
Applications: Heat Transfer Oils, Lubrication Oils, Mineral Oil, Degreasing Solutions
23 W/in2➇ 1.25 1.1 CBDNF16G20 26 (12)
Steel Tank 1.65 1.2 CBDNF19G20 30 (14)
1-Incoloy
(3.6 W/cm2) 2.65 1.3 CBDNF29R20 CBDNF29R19 43 (20)
®
5.0 1.1 CBDNF16G3 CBDNF16G5 26 (12)
2
) 6.5 1.2 CBDNF19G3 CBDNF19G5 30 (14)
8.5 1.2 CBDNF24L3 CBDNF24L5 31 (14)
10.5 1.3 CBDNF29R3 CBDNF29R5 43 (20)
12.75 1.3 CBDNF34R3 CBDNF34R5 44 (20)
17.0 1.4 CBDNF45G3 CBDNF45G5 69 (32)
21.5 1.4 CBDNF55R5 71 (33)
®
3.0 1.2 CBDNF18A27 30 (14)
5.0 1.3 CBDNF27J27 CBDNF27J28 43 (20)
6.0 1.3 CBDNF32J27 CBDNF32J28 44 (20)
8.0 1.4 CBDNF42A27 CBDNF42A28 69 (32)
10.0 1.4 CBDNF51J27 CBDNF51J28 71 (33)
®
2.8 1.2 CBDNF24L12 CBDNF24L13 31 (14)
4.25 1.3 CBDNF34R12 CBDNF34R13 44 (20)
5.7 1.4 CBDNF45G12 CBDNF45G13 69 (32)
7.2 1.4 CBDNF55R12 CBDNF55R13 71 (33)
®
2.15 1.2 CBDNF24L20 CBDNF24L19 31 (14)
3.20 1.3 CBDNF34R20 CBDNF34R19 44 (20)
4.25 1.4 CBDNF45G20 CBDNF45G19 69 (32)
5.40 1.4 CBDNF55R20 CBDNF55R19 71 (33)
CONTINUED
Circulation Heaters
All circulation heaters are Assembly Stock
unless otherwise noted.
Availability
Assembly Stock: Five to seven working days
Standard: 10 working days
Truck Shipment only
b Standard
c Must be operated 3-phase wye.
g Available in 1-phase only.
h Can be wired 1-phase.
373
Tubular and
3
1
/8
"
(79 mm)
Ref
A
4
3
/8
"
(111 mm)
5
5
/8
"
(143 mm)
Ref
4
15
/16
"
(125 mm)
1" NPT Inlet & Outlet
3
/8
"
- 16 UNC Thread
(4 places)
3
/4
"
deep (19 mm)
Ref
3
1
/2
"
(89 mm)
11
3
/16
"
(284 mm)
C
1
1
/4
"
(32 mm)
1
/2
"
NPT
B
1
/2
"
NPT
7
3
/16
"
(183 mm)
Process Assemblies
Circulation Heaters
" NPT Screw Plug—FIREBAR Element
11⁄4
FIREBAR Code No. Est. Ship.
Description kW Fig. 240VÅ(ac) 240VÅ(ac) 480VÅ(ac) 480VÅ(ac) Weight
No. 1-Phase 3-Phase 1-Phase 3-Phase lbs (kg)
Applications: Medium Weight Oils, Heat Transfer Oils, Lube Oils, Liquid Paraffin
15 W/in2➂ 0.67 1.1 CBDNF13A29 25 (12)
Steel Tank 0.83 1.1 CBDNF15J29 26 (12)
1-Incoloy
(2.3 W/cm2) 1.33 1.2 CBDNF22J29 CBDNF22J30 31 (14)
Applications: Bunker C and #6 Fuel Oils, Asphalt
8 W/in2➂ 0.43 1.1 CBDNF16G22 26 (12)
Steel Tank 0.55 1.2 CBDNF19G22 30 (14)
1-Incoloy
(1.3 W/cm2) 0.88 1.3 CBDNF29R22 CBDNF29R21 43 (20)
All circulation heaters are Assembly Stock
unless otherwise noted.
Availability
Assembly Stock: Five to seven working days
Standard: 10 working days
®
1.00 1.2 CBDNF18A29 30 (14)
1.67 1.3 CBDNF27J29 CBDNF27J30 43 (20)
2.00 1.3 CBDNF32J29 CBDNF32J30 44 (20)
2.67 1.4 CBDNF42A29 CBDNF42A30 69 (32)
3.30 1.4 CBDNF51J29 CBDNF51J30 71 (33)
®
0.70 1.2 CBDNF24L22 CBDNF24L21 31 (14)
1.08 1.3 CBDNF34R22 CBDNF34R21 44 (20)
1.40 1.4 CBDNF45G22 CBDNF45G21 69 (31)
1.80 1.4 CBDNF55R22 CBDNF55R21 71 (32)
Truck Shipment only
➂ Must be operated 3-phase wye only.
2" NPT
21⁄
1
2
⁄2" NPT Screw Plug
Fig. A Dimension B Dimension C Dimension
No. in (mm) in (mm) in (mm)
2.1 3411⁄16 (881) 221⁄2 (572) 161⁄2 (419)
2.2 4411⁄16 (1135) 321⁄2 (1129) 261⁄2 (673)
2.3 573⁄
2.4 63
16 (1453) 45 (1143) 39 (991)
11
⁄16 (1618) 511⁄2 (1308) 461⁄2 (1181)
2.5 3411⁄16 (881) 221⁄2 (572) 161⁄2 (419)
374
2.6 4411⁄
2.7 57
(1135) 32
16
3
⁄16 (1453) 45 (1143) 39 (991)
1
(1129) 26
2
⁄
1
2
⁄
(673)
W A T L O W
Tubular and
Process Assemblies
Circulation Heaters
21⁄2" NPT Screw Plug—WATROD Element
WATROD Code No. Est. Ship.
Description kW Fig. 240VÅ(ac) 480VÅ(ac) Weight
No. 3-Phase 3-Phase lbs (kg)
Application: Clean Water
2
60 W/in
Steel Tank 7.5 2.5 CBLC717L3 CBLC717L5 24 (11)
3-Copper 9.0 2.5 CBLC720L3 CBLC720L5 26 (12)
(9.3 W/cm2) 12.0 2.6 CBLC726C3 CBLC726C5 27 (13)
Application: Deionized Water , Demineralized Water
2
60 W/in
316 SS Tank 7.5 2.5 CBLR717L3 CBLR717L5 24 (11)
3-316 SS 9.0 2.5 CBLR720L3 CBLR720L5 26 (12)
(9.3 W/cm2) 12.0 2.6 CBLR726C3 CBLR726C5 27 (13)
Passivated 15.0 2.6 CBLR731L3 CBLR731L5 29 (14)
Application: Process Water
2
48 W/in
Steel Tank 7.5 2.5 CBLN719R3 CBLN719R5 26 (12)
3-Incoloy
(7.5 W/cm2) 12.0 2.6 CBLN732G3 CBLN732G5 29 (14)
®
Applications: Forced Air and Gases, Caustic Solutions, Degreasing Solutions
23 W/in2➄➅ 3.0 2.5 CBLNA17G3 CBLNA17G5 24 (11)
Steel Tank 4.5 2.6 CBLNA24R3 CBLNA24R5 27 (13)
3-Incoloy
(3.6 W/cm
®
Applications: Lightweight Oils, Degreasing Solutions, Heat Transfer Oils
23 W/in2➅ 3.0 2.5 CBLS717E3 CBLS717E5 24 (11)
Steel Tank 4.5 2.5 CBLS724N3 CBLS724N5 27 (13)
3-Steel 6.0 2.6 CBLS732E3 CBLS732E5 29 (14)
(3.6 W/cm2) 7.5 2.7 CBLS739N3 CBLS739N5 31 (14)
Applications: Medium Weight Oils, Heat Transfer Oils, Lube Oils, Liquid Paraffin
16 W/in2➂ 2.0 2.5 CBLN717G12 CBLN717G13 24 (11)
Steel Tank 2.5 2.5 CBLN719R12 CBLN719R13 26 (12)
3-Incoloy
(2.5 W/cm2) 4.0 2.6 CBLN732G12 CBLN732G13 29 (14)
®
Applications: Bunker C and #6 Fuel Oils
8 W/in2➂ 2.0 2.6 CBLS732E12 CBLS732E13 29 (14)
Steel Tank 3.0 2.7 CBLS747E12 CBLS747E13 32 (15)
3-Steel
(1.3 W/cm2)
6.0 2.5 CBLC714L3 CBLC714L5 24 (11)
15.0 2.6 CBLC731L3 CBLC731L5 29 (14)
18.0 2.7 CBLC737C3 CBLC737C5 30 (14)
6.0 2.5 CBLR714L3 CBLR714L5 24 (11)
18.0 2.7 CBLR737C3 CBLR737C5 30 (14)
6.0 2.5 CBLN717G3 CBLN717G5 24 (11)
9.0 2.5 CBLN724R3 CBLN724R5 27 (13)
15.0 2.7 CBLN739R3 CBLN739R5 31 (14)
18.0 2.7 CBLN747G3 CBLN747G5 32 (15)
6.0 2.6 CBLNA32G3 CBLNA32G5 29 (14)
2
) 7.5 2.7 CBLNA39R3 CBLNA39R5 31 (14)
9.0 2.7 CBLNA47G3 CBLNA47G5 32 (15)
9.0 2.7 CBLS747E3 CBLS747E5 32 (15)
3.0 2.5 CBLN724R12 CBLN724R13 27 (13)
5.0 2.7 CBLN739R12 CBLN739R13 31 (14)
6.0 2.7 CBLN747G12 CBLN747G13 32 (15)
All circulation heaters are Assembly Stock
unless otherwise noted.
Availability
Assembly Stock: Five to seven working days
Standard: 10 working days
➂ Must be operated 3-phase wye only.
➄ 240VÅ(ac) can be wired wye and operated
at 480VÅ(ac) 3-phase to produce 1⁄3 more kW
and watt density.
➅ Can be wired wye to produce 1⁄3 of the
original kW and watt density
(3-phase only).
Circulation Heaters
375
Tubular and
Process Assemblies
Circulation Heaters
21⁄2" NPT Screw Plug—FIREBAR Element
FIREBAR Code No. Est. Ship.
Description kW Fig. 240VÅ(ac) 480VÅ(ac) Weight
No. 3-Phase 3-Phase lbs (kg)
Applications: Clean and Potable Water
90 W/in2h 15.0 2.1 CBLNF15C3 CBLNF15C5 22 (10)
Steel Tank 20.0 2.1 CBLNF18C3 CBLNF18C5c 23 (11)
3-Incoloy
(14 W/cm2) 32.0 2.2 CBLNF28L5 34 (16)
Applications: Process Water, Ethylene Glycol (50%)
45 W/in2h 6.0 2.1 CBLNF12A27 21 (10)
Steel Tank 7.5 2.1 CBLNF14J27 22 (10)
3-Incoloy
(7 W/cm2) 12.0 2.1 CBLNF21J27 CBLNF21J28 31 (14)
Applications: Cooking Oils, Ethylene Glycol (100%)
30 W/in2c 5.0 2.1 CBLNF15C12 CBLNF15C13 22 (10)
Steel Tank 6.5 2.1 CBLNF18C12 CBLNF18C13 23 (11)
3-Incoloy
(4.7 W/cm2) 10.5 2.2 CBLNF28L12 CBLNF28L13 34 (16)
Applications: Heat Transfer Oils, Mineral Oil, Degreasing Solutions
23 W/in2h 3.8 2.1 CBLNF15C20 22 (10)
Steel Tank 4.9 2.1 CBLNF18C20 23 (11)
3-Incoloy
(3.6 W/cm2) 7.9 2.2 CBLNF28L20 CBLNF28L19 34 (16)
Applications: Medium Weight Oils, Heat Transfer Oils, Lube Oils, Liquid Paraffin
15 W/in2c 2.0 2.1 CBLNF12A29 21 (10)
Steel Tank 2.5 2.1 CBLNF14J29 22 (10)
3-Incoloy
(2.3 W/cm2) 4.0 2.1 CBLNF21J29 CBLNF21J30 31 (14)
Applications: Bunker C and #6 Fuel Oils, Asphalt
8 W/in2c 1.25 2.1 CBLNF15C22 22 (10)
Steel Tank 1.63 2.1 CBLNF18C22 23 (10)
3-Incoloy
(1.3 W/cm2) 2.63 2.2 CBLNF28L22 CBLNF28L21 34 (15)
®
25.0 2.1 CBLNF23C5 31 (14)
38.0 2.2 CBLNF33L5 35 (16)
®
®
®
®
®
9.0 2.1 CBLNF17A27 23 (11)
15.0 2.2 CBLNF26J27 CBLNF26J28 34 (16)
18.0 2.2 CBLNF31J27 CBLNF31J28 35 (16)
24.0 2.3 CBLNF41A28 44 (20)
30.0 2.4 CBLNF50J28 52 (24)
8.5 2.1 CBLNF23C12 CBLNF23C13 31 (14)
12.8 2.2 CBLNF33L12 CBLNF33L13 35 (16)
17.0 2.3 CBLNF44C12 CBLNF44C13 44 (20)
21.5 2.4 CBLNF54L13 52 (24)
6.4 2.1 CBLNF23C20 CBLNF23C19 31 (14)
9.6 2.2 CBLNF33L20 CBLNF33L19 35 (16)
12.8 2.3 CBLNF44C20 CBLNF44C19 44 (20)
16.1 2.4 CBLNF54L20 CBLNF54L19 52 (24)
3.0 2.1 CBLNF17A29 23 (11)
5.0 2.2 CBLNF26J29 CBLNF26J30 34 (16)
6.0 2.2 CBLNF31J29 CBLNF31J30 35 (16)
8.0 2.3 CBLNF41A29 CBLNF41A30 44 (20)
10.0 2.4 CBLNF50J29 CBLNF50J30 52 (24)
2.13 2.1 CBLNF23C22 CBLNF23C21 31 (14)
3.19 2.2 CBLNF33L22 CBLNF33L21 35 (16)
4.25 2.3 CBLNF44C22 CBLNF44C21 44 (20)
5.38 2.4 CBLNF54L22 CBLNF54L21 52 (24)
All circulation heaters are Assembly Stock
unless otherwise noted.
Availability
Assembly Stock: Five to seven working days
Standard: 10 working days
Note: Assembly Stock may be shipped same
day if ordered before 11:00 am CST.
c Must be operated 3-phase wye only.
h Can be wired 1-phase.
376
W A T L O W
Ref
A
5
5
/8
"
(143 mm)
4
1
/8
"
(105 mm)
1" NPT Inlet & Outlet
3
/8
"
- 16 UNC Thread
(4 places)
3
/4
"
(19 mm) deep
(2 places)
1
1
/4
"
(32 mm)
Ref
5
"
(127 mm)
Ref
7
11
/16
"
(195 mm)
Ref
11
1
/2
"
(292 mm)
C
B
1
/2
"
NPT
1
/2
"
NPT
3
1
/8
"
(79 mm)
4
3
/8
"
(111 mm)
Tubular and
Process Assemblies
Circulation Heaters
3" Flange
3" 150 lb ANSI Flange—WATROD Element
Fig. A Dimension B Dimension C Dimension
No. in (mm) in (mm) in (mm)
3.1 35
3.2 45
3.3 57
3
16 (894) 22
⁄
3
⁄16 (1148) 321⁄2 (826) 261⁄2 (673)
11
⁄16 (1465) 45 (1143) 39 (991)
1
2 (573) 16
⁄
1
2 (419)
⁄
Circulation Heaters
WATROD Code No. Est. Ship.
Description kW Fig. 240VÅ(ac) 240VÅ(ac) 480VÅ(ac) 480VÅ(ac) Weight
No. 1-Phase 3-Phase 1-Phase 3-Phase lbs (kg)
Application: Clean Water
2
60 W/in
6.0 3.1 CFMC715J10 CFMC715J3 CFMC715J11 CFMC715J5 66 (30)
Steel Tank 9.0 3.1 CFMC721J10 CFMC721J3 CFMC721J11 CFMC721J5 70 (32)
3-Copper 12.0 3.2 CFMC727A3 CFMC727A11 CFMC727A5 80 (37)
2
(9.3 W/cm
) 15.0 3.2 CFMC732J3 CFMC732J11 CFMC732J5 96 (44)
18.0 3.3 CFMC738A3 CFMC738A11 CFMC738A5 98 (45)
Application: Process Water
48 W/in2➄ 6.0 3.1 CFMN718A10 CFMN718A3 CFMN718A11 CFMN718A5 68 (31)
Steel Tank 7.5 3.1 CFMN720J10 CFMN720J3 CFMN720J11 CFMN720J5 70 (32)
®
3-Incoloy
(7.5 W/cm
9.0 3.2 CFMN725J10 CFMN725J3 CFMN725J11 CFMN725J5 78 (36)
2
) 12.0 3.2 CFMN733A3 CFMN733A11 CFMN733A5 96 (44)
15.0 3.3 CFMN740J3 CFMN740J11 CFMN740J5 100 (46)
18.0 3.3 CFMN748A3 CFMN748A11 CFMN748A5 107 (49)
Applications: Forced Air and Gases, Caustic Solutions, Degreasing Solutions
23 W/in2➄➅ 3.0 3.1 CFMNA18A10 CFMNA18A3 CFMNA18A11 CFMNA18A5 68 (31)
Steel Tank 4.5 3.2 CFMNA25J10 CFMNA25J3 CFMNA25J11 CFMNA25J5 78 (36)
3-Incoloy
(3.6 W/cm2) 7.5 3.3 CFMNA40J10 CFMNA40J3 CFMNA40J11 CFMNA40J5 100 (46)
All circulation heaters are Assembly Stock
unless otherwise noted.
Availability
Assembly Stock: Five to seven working days
Standard: 10 working days
®
6.0 3.2 CFMNA33A10 CFMNA33A3 CFMNA33A11 CFMNA33A5 96 (44)
9.0 3.3 CFMNA48A10 CFMNA48A3 CFMNA48A11 CFMNA48A5 107 (49)
Truck Shipment only
➄ 240VÅ(ac) can be wired wye and
operated at 480VÅ(ac) 3-phase to
produce
➅ Can be wired wye to produce
original kW and watt density
(3-phase only).
1
more kW and watt density.
3
⁄
1
3
⁄
of the
CONTINUED
377
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