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FLANGE IMMERSION HEATERS
Branch Circuits
Branch circuits are subdivided by National Electrical Code
(NEC) requirements to a maximum of 48 amps per circuit.
Sheath Materials
The following sheath materials are available on WATROD
and FIREBAR flange heaters:
Standard Sheath Materials Made-to-Order Sheath Materials
Exotic Sheath Materials
Consult your Watlow representative
for details and availability.
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 corrode, produce
rust spots and/or contaminate the process. For critical sheath
applications, passivation will remove free iron from the
sheath.
Other Finishes
Simple belt polishing and glass beading are available to
meet cosmetic demands.
Flanges
Flange Sizes and Styles
Standard: 2
➀
, 2
1
⁄2
➀
, 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, Troy, Missouri.
Gaskets
Rubber, asbestos-free and spiral wound gaskets are
available for all flange sizes.
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. For open tank or
convection heating applications, standard element supports
will be supplied.
WATROD
FIREBAR
Incoloy
®
316 stainless steel
Steel
Copper
Incoloy
WATROD
FIREBAR
304 stainless steel
Monel
®
304 stainless steel
Ordering Information
How to Order
To order a stock flange heater, please specify:
• Watlow code number (from Watlow Heater's Catalog)
• 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 in Watlow Heater’s Catalog. 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 length
• Flange size, rating and material
• No-heat section below the flange
• Terminal enclosure type
• Options
• Quantity
Availability
• Stock: Same day shipment
• Assembly Stock: 5-7 working days
• Modified Stock: 5-7 working days
• Standard: 10 working days
• Made-to-Order: 5-7 weeks
Options, complexity and quantity may affect availability
and leadtimes. Consult factory.
Monel
®
and Incoloy
®
are registered to the Inco family of companies.
➀
ANSI compatible only.