Screw Plug Immersion Heaters

Screw Plug Immersion Heaters, Screw, Plug, Immersion, Heaters, screwplug, heatingScrew plug immersion heaters are ideal for are ideal for direct immersion heating of liquids, including all types of oils and heat transfer solutions where space and connections are a problem. Screw plug immersion heaters can have from 1 to 3 elements, or blades, either welded or brazed into the screw plug.


Screw plug immersion heaters are installed in medium to small size containers at pressures up to 3000 PSI. Watt densities from 90 Watts/sq. inch, Explosion Proof (NEMA 7), Corrosion Resistant (NEMA 4X), and General Purpose Terminal housings are available.


A number of sheath materials like Titanium, Incoloy, Stainless Steel, Steel, and Copper can be used as required for specific applications. To guarantee sheath material and watt density compatibility with material or process being heated consult HCS.


Screw Plug Immersion Heaters Features:

  • High watt densities, wattage's in smaller areas

  • Passivated 316 Stainless Steel option

  • Sheath temperatures to 1200ºF

  • Low watt densities possible for delicate applications

  • NPT sizes from 1 " to 2 1/2"

  • Applications solids, liquids, gases


Screw Plug Immersion Heaters Specificationss:

  • Voltages - 120 to 600 Volts Single or Three Phase

  • Wattages - Varied from 150 watts to 50 Kilowatts

  • Sheath Materials - Titanium, Monel, Incoloy, 316/304 Stainless Steel, Steel, Copper, Carbon Steel

  • Max Temperatures - Incoloy 1600ºF (870ºC), 304/ 16 Stainless Steel 1200ºF (650) Steel 750ºF (400ºC) Copper 350ºF (175ºC)

  • Screw Plug Sizes NPT - 1 ", 1 1 /4", 2", and 2 1/2", BSP sizes contact HCS

  • Terminal Enclosures - General Purpose (NEMA 1 ), Moisture Resistant (NEMA 4), Corrosion Resistant ( NEMA 4X), Explosion Resistant (NEMA 7), Explosion Moisture Resistant (NEMA 7/4)

  • Temperature Control - Thermocouple, RTD, or Thermostat

  • High Limit - High Limit Thermocouple, Hi Limit Thermostat

  • Approvals - CSA, UL

  • Certification - ASME, CRR


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