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Watlow Flange Immersion Heaters

Wattages Availible


1,000,000 Watts

Product Spec Sheets:

Square Flange Immersion Heaters

Standard Flange Immersion Heaters



 Watlow flange heaters are easy to install and maintain. Designed for heating liquids and gases in tanks and pressure vessels, flange immersJon heaters are ideal for applications requiring higher kilowatts.
Watlow flange heaters are made with WATROD or FIREBAR tubular elements brazed or welded to a flange. Stock flange heaters are equipped with a general purpose (NEMA 1) terminal enclosure. Flange heaters, with FIREBAR elements, also answer the need for liquid immersion applications requiring high kilowatts in small tanks. The FIREBAR element's unique flat surface geometry packs more power in a smaller bundle, with lower watt density, making it especially well suited for petroleum-based liquid heating applications

Product type


  • Watt densities to 100 W/in (15.5 W/cm)
  • Wattages to one megawatt
  • UL and CSA component recognition to 480V~(ac) and 600V(ac) respectively
  • Incoloy sheath temperatures to 1600F (870C)
  • Passivated 316 stainless steel sheath temperatures to 1200F (650'%)
  • 304 stainless steel sheath temperatures to 1200F (650C)
  • Steel sheath temperatures to 750F (400~ C)
  • Copper sheath temperatures to 350~F (175C)

Product Spec Sheet in Adobe Acrobattm Format (Square Flange)
Product Spec Sheet in Adobe Acrobattm Format (Standard)