Watlow 2259-0788 Circulation Heater

The Watlow 2259-0788 Circulation Heater is an inline electric heater designed to heat circulating liquids and process fluids in closed-loop thermal systems. It operates on 208 VAC three-phase power, delivering 1500 W of heat through a 3/4 in. NPT process connection and is rated for a maximum temperature of 250°F. Designed for continuous-duty operation in industrial process heating systems, it is commonly installed in chemical processing equipment, water treatment systems, industrial wash stations, and manufacturing process skids. With a 4 A current rating, this heater serves inline liquid heating applications and is well suited to replacements, preventive maintenance, retrofit projects, and maintaining stable process temperatures by maintenance teams, OEMs, and system integrators. The combination of the 3/4 in. NPT connection and its inline heating design supports reliable heating in recirculating water loops, heat transfer lines, and packaging or process equipment where precise inline heating is required.