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Watlow WATROD™ & FIREBAR®  Screw Plug Immersion Heaters
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Watlow WATROD™ & FIREBAR® Screw Plug Immersion Heaters

Product Overview

Watlow screw plug immersion heaters are ideal for direct immersion heating of liquids, including all types of oils and heat transfer solutions.

Overview

Available in a variety of sizes, Watlow screw plug immersion heaters feature both WATROD™ round and FIREBAR® ​ flat tubular elements.

Heating elements are hairpin bent and either welded or brazed into the screw plug, depending on element sheath and plug material compatibility.

General purpose terminal enclosures are standard with optional moisture resistant, explosion resistant and explosion/moisture resistant enclosures available to meet specific application needs.

Optional thermostats provide convenient process temperature regulation to the screw plug immersion heater.

Features & Benefits

  • UL® and CSA component recognition.
  • A variety of element sheath and screw plug materials to meet your application needs.
  • Integral thermowells provide convenient temperature sensor insertion and replacement without draining the fluid being heated.
  • Terminal enclosures provide ability to be rotated to simplify connection with existing conduits.
  • Welding or brazing WATROD and FIREBAR elements to the screw plug for a pressure tight seal.

Specifications

Material
Alloy 800/840

Maximum Operating Temperatures
1600 F°
870 C°

Maximum Watt Densities
W/in2 = 120
W/cm2 = 18.6
Material
Stainless Steel

Maximum Operating Temperatures
1200 F°
650 C°

Maximum Watt Densities
W/in2 = 120
W/cm2 = 18.6
Material
Steel

Maximum Operating Temperatures
750 F°
400 C°

Maximum Watt Densities
W/in2 = 120
W/cm2 = 18.6
Material
N/A

Maximum Operating Temperatures
350 F°
175 C°

Maximum Watt Densities
W/in2 = 120
W/cm2 = 18.6

Documentation

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