Screw Plug Heaters

WATROD™ and FIREBAR® Heaters Designed to Heat Forced-Circulation Air, Gases or Liquids

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 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.

Material	316 Stainless Steel
Maximum Operating Temperature - C	650
Maximum Operating Temperature - F	1200
Maximum Watt Densities	18.6
Maximum Watt Densities	120
Material	Alloy 800/400
Maximum Operating Temperature - C	870
Maximum Operating Temperature - F	1600
Maximum Watt Densities	18.6
Maximum Watt Densities	120
Material	N/A
Maximum Operating Temperature - C	175
Maximum Operating Temperature - F	350
Maximum Watt Densities	18.6
Maximum Watt Densities	120
Material	Steel
Maximum Operating Temperature - C	400
Maximum Operating Temperature - F	750
Maximum Watt Densities	18.6
Maximum Watt Densities	120