Circulation heaters provide a ready-made 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® 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.

• Provides a wide selection of WATROD and FIREBAR elements to meet specific application requirements

• Meets recognized agency standards

• Replaces larger flanges with round tubular elements, with a smaller package

• Maximizes dielectric strength, heat transfer and life

• Reduces heat loss from the vessel

• Protects thermal insulation and heating vessel and comes with protective primer coating

• Provides pressure vessels (tanks) that are either carbon or 316 stainless steel

• Provides pressure vessels (tanks) available in carbon steel, 304 or 316 stainless steel materials
• Includes schedule 40, standard and 80 pipe used in the pressure vessel construction