Watlow screw plug immersion heaters provide direct immersion heating solutions for liquids including oils, heat transfer fluids, water, and caustic solutions. These heaters feature WATROD round and FIREBAR flat tubular elements hairpin bent and either welded or brazed into the screw plug, ensuring pressure-tight seals and unparalleled performance. Ratings up to 38kW with watt densities reaching 120W/in² make these heaters suitable for demanding industrial applications.

Temperature Control Integration

Integral thermowells facilitate convenient temperature sensor insertion and replacement without draining the medium being heated. Type J or K thermocouples can be inserted into the thermowell or attached to the heater sheath for accurate process and sheath temperature monitoring. This design enables precise temperature control while minimizing maintenance downtime.

Enclosure and Safety Options

Multiple terminal enclosure options protect wiring from moisture and corrosion, with explosion-proof enclosures available for hazardous environments. An optional power status light provides visual indication of heater operation. UL and CSA component recognition up to 480VAC (UL) and 600VAC (CSA) ensures compliance with electrical safety standards. General purpose enclosures with rotation capability simplify conduit connections.

Application Versatility

These heaters excel in industrial water rinse tanks, hydraulic oil heating, crude oil and asphalt applications, vapor degreasers, paraffin processing, caustic solutions, and air or gas flow heating. Material compatibility options include various sheath and screw plug materials to match specific application requirements, from standard steel to corrosion-resistant alloys.