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Watlow WATROD™ & FIREBAR® Circulation Heaters
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Watlow WATROD™ & FIREBAR® Circulation Heaters

Product Overview

Watlow’s circulation heaters provide a ready-made means to install electric heating with a minimal amount of time and labor.

Overview

Watlow circulation heaters combine 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®​ or WATROD™​ heating elements, to deliver fast response and even heat distribution.

Watlow meets virtually all your circulation heater assembly needs with made-to-order units. These units can be made from a wide range of heating element sheath materials, wattages, vessel sizes and materials, pressure ratings, terminal enclosures and controls.

Features & Benefits

  • Catalog screw plug and flange part numbers provides a wide selection of WATROD and FIREBAR®​ elements to meet specific application requirements.
  • ANSI B16.5 Class 150 on 4 or 6 inch FIREBAR® element flanges and 3 to 14 inch WATROD element flanges meets recognized agency standards.
  • ​Compacted MgO insulation filled elements maximizes dielectric strength, heat transfer and life.
  • Heavy-guage steel jacket (shroud) protects thermal insulation and heating vessel and comes with protective primer coating.
  • 1 inch (25 mm) thermal insulation rated to 750°F (400°C) reduces heat loss from the vessel.

Specifications

Material
Alloy 800/400

Maximum Operating Temperatures
1600 F°
870 C°

Maximum Watt Densities
W/in2 = 120
W/cm2 = 18.6
Material
316 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

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