IDEAL FOR DIRECT IMMERSION HEATING OF LIQUIDS

Screw plug immersion heaters are ideal for direct immersion heating of liquids, including all types of oils and heat transfer solutions.

Available in a variety of sizes, Watlow screw plug immersion heaters feature both WATROD round and FIREBAR flat tubular elements.

Heating elements are hairpin bent and either welded or brazed into the screw plug, depending on element sheath and plug material compatibility.

General purpose terminal enclosures are standard with optional moisture resistant, explosion resistant and explosion/moisture resistant enclosures available to meet specific application needs.

Optional thermostats provide convenient process temperature regulation to the screw plug immersion heater.

• UL® and CSA component recognition
• A variety of element sheath and screw plug materials to meet your application needs
• Integral thermowells provide convenient temperature sensor insertion and replacement without draining the fluid being heated
• Terminal enclosures provide ability to be rotated to simplify connection with existing conduits
• Welding or brazing WATROD and FIREBAR elements to the screw plug for a pressure tight seal

FITS VIRTUALLY ENTIRE RANGE OF IMMERSION AND AIR HEATING APPLICATIONS

Available in single- or double-ended termination styles, the versatile and economical WATROD tubular heating element from Watlow lends itself to virtually the entire range of immersion and air heating applications.

The single-ended WATROD tubular heater design has both terminals at one end. The opposite end is sealed. Flexible lead wires are 12 in. (305 mm) crimp connected to the terminal pin and have silicone-impregnated fiberglass oversleeves.

The double-ended WATROD, with its round cross-sectional geometry, are highly adaptable for bending—especially when bending is performed in the field. Watlow’s double-ended MULTICOIL tubular elements offer various combinations of resistor coils and thermocouples inside one sheath. They have the ability to sense the heater’s internal temperature accurately every time, or offer three-phase capability in one element.

Both single- and double-ended WATRODs share many construction features delivering long life—the resistance wire is centered in the heater sheath and electrically insulated with compacted, high-grade magnesium oxide for superior heating performance.

WATROD tubular heating elements have a variety of mounting and termination options making them highly popular among industrial customers.

• Single-ended: UL® and CSA component recognition to 240VAC
• Double-ended: UL® and CSA component recognition up to 600VAC

MULTIPLE COILS AND THERMOCOUPLES PACKAGED IN ONE SHEATH FOR QUICK INSTALLATION

The MULTICOIL heater tubular element with multiple coils and/or thermocouples inside one sheath answers the need for a versatile, innovative tubular multiple coil heater. Watlow’s patented method of packaging a thermocouple inside of a heater with one or more resistance coils gives the ability to sense a heater’s internal temperature accurately, every time.

Moreover, this is the first tubular heater in the industry with three-phase capability. The three coil, three-phase heater will offer a compact package solution while delivering the full power required in a compact heater package. Previously three separate heaters would have been required to do the same job; therefore Watlow’s MULTICOIL heater capabilities save money.

• Three-phase capability results in one element versus three, lower amperage, reduced installation time and lower overall cost
• Multiple coil operations reduces inventory by allowing dual voltage capability
• Versatile forming capabilities forms into many configurations
• Internal thermocouple construction eliminates contamination buildup around the external sensing tip, reducing the possibility of false readings