Watlow Heater Fan User Manual

Energy Efficient

Solution For Heating

Water, Oils and

Degreasing

Solutions

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 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 are 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/in2(15.5 W/cm2)

• Wattages to 24 kW

• Voltages to 480VAC

• Incoloy®sheath temperatures to 1600OF (870OC)

SQUARE FLANGE IMMERSION HEATERS

Features

•21⁄2, 31⁄8 and 41⁄2 inch
square flanges

• Asbestos-free gaskets

• Epoxy or silicone resin
seals rated to 250OF
(120OC) or 390OF (200OC)
respectively

• WATROD hairpins are
repressed (recompacted)

•UL®and CSA component
recognition under files
#E52951 and 31388
respectively

Benefits

• Mulitiple sizes to adapt to
application needs

• Provide good seal between
flanges

• Protect elements against
moisture and other
contaminants

• Maintains MgO density,
dielectric strength, heat
transfer and life

• Designed for safety

Incoloy®is a registered trademark of the Inco family of companies.
UL®is a registered trademark of Underwriters Laboratories, Inc.

A subsidiary of Watlow, Designer and Manufacturer
of Industrial Heaters, Sensors and Controls
6 Industrial Loop Road
Hannibal, Missouri 63401 USA
Phone: [phone]
Fax: [phone]
Internet: www.watlow.com

Watlow Industries

© 1999 Watlow Electric Manufacturing Company

FAX-1944-036

SQUARE FLANGE IMMERSION HEATERS

Flange Materials:

Applications

• Water

• Boiler equipment

• Vapor degreasers

• Fuel oils

• Heat transfer fluids

• Caustic solutions

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

Ordering Information

How to Order

To order a stock unit, please specify:

• Watlow code number (from Watlow Heater's Catalog)

• Flange size and material

• Volts / watts

• Phase

• Quantity
If our stock units do not meet your application needs,
Watlow can provide a Made-to-Order unit. For
Made-to-Order units, please specify:

• Application

• Volts / watts

• Phase

• Flange size, dimensions and material

• Sheath material and diameter

• Number of elements

• No-heat section below the flange

• Immersed ('B' dimension) length

• Maximum bundle diameter or clearance hole size

• Bolt pattern, if not standard

• Options

• Quantity

Availability
Stock: Same day shipment
Assembly Stock: 5-7 working days
Modified Stocka: 5-7 working days
Standard: 3 weeks
Made-to-Order: 4-6 weeks

a

Options, complexity and quantity may affect
availability and leadtimes.Consult factory.

WATROD

FIREBAR

Steel
304 stainless steel
Steel
Brass