Ohm's Law – Single
Ohm's Law – Triple (Delta)
Ohm's Law – Triple (Wye)
Heat Energy Requirements
Wattage Requirements
  • Immersion Heaters

    Durex Industries has over 30 years of experience in the application, design and manufacturer of robust tubular immersion heaters and process assemblies. We have thousands of standard designs for quick field replacements and convenient ordering. Durex also has extensive experience with custom designed electric immersion heaters for tank, reservoir and circulation flow applications.

    Industrial immersion heaters are used for direct liquid immersion heating applications. They are constructed of one or more heater elements brazed or welded into various types of mounting fittings. Standard and custom engineered designs are available for tailored solutions to your thermal application requirements.

    Shop Online for standard designed Screw Plug and Flange Immersion heaters.

    Contact us for Engineering Assistance.

    National Board 'R' Certificate

    ASME 'U' Certificate

    More Products In This Section

    • Screw Plug Immersion Heaters
      Screw Plug Immersion Heaters
      Screw plug immersion heaters are used in almost every liquid heating application imaginable, including water, mild solutions, detergents, vegetable oil, aqueous solutions, tar, asphalt, petroleum products, plating chemicals, molten salt baths, grease, gas or grape juice.  Various sheath, screw plug and corrosion-resistant hardware materials are available.  NEMA enclosures for all…
    • Flange Immersion Heaters
      Flange Immersion Heaters
      Flange immersion heaters are constructed of hairpin bent tubular heater elements brazed or welded into ANSI standard flanges or plate flanges of various shapes and sizes. ANSI flange heaters are typically used for large volume, high power and/or higher pressure applications. Plate flange heaters are typically custom designed for use…
    • Over-The-Side Immersion Heaters
      Over-The-Side Immersion Heaters
      Over-the-side immersion heaters are designed for the robust requirements of corrosive chemicals, viscous (potentially contaminated) fluids, and rinse and process water heating. Various configurations of tubular heater element assemblies provide convenient tank side mounting when through-the-wall heaters cannot be installed, portability is required, or when heaters must be removed without…
    • Pipe Insert (Dry Well) Heaters
      Pipe Insert (Dry Well) Heaters
      Screw plug and flange immersion heaters can be used to heat a “dry well” in a tank. This provides tank heating, while facilitating easy removal of the heater without draining the tank contents. Removal of a screw plug or flange immersion heater from a tank for servicing or replacement requires that the…
    • Tubular Immersion Heaters
      Tubular Immersion Heaters
      Tubular immersion heaters are commonly used in radiant and immersion heating applications such as infant incubators where a formed tubular heater warms the air flow and an immersion tubular heater assembly vaporizes water to provide humidity. Tubular heater assemblies are also the preferred solution for laboratory sterilizers and environmental chambers.…

    Engineering Data

    Process Heater Application Guidelines


    Screw   Plug/Flange Material

    Element Sheath Material

    Typical Maximum Watt          Density(w/in2)

    Clean/Potable Water Brass, Steel, 304 Stainless Steel Copper, Incoloy®, 304 Stainless Steel                      60 - 90
    Deionized/Demineralized Water 316 Stainless Steel (Passivated) 316 Stainless Steel (Passivated)                      60 - 90
    Process Water Steel Incoloy®                      45 - 48
    Caustic & Degreasing Solutions Steel Incoloy®                      20 - 23
    Forced Air & Gases Steel, 304 Stainless Steel Incoloy®                      20 - 30
    Light Weight Oils, Degreasing Solutions, Heat Transfer Oils Steel Steel                      20 - 23
    Mildly Corrosive Solutions Steel, 304 Stainless Steel Incoloy®                      15 - 16
    Medium Weight Oils, Heat Transfer Oils, Paraffin Steel Steel                      15 - 16
    Bunker C & #6 Fuel Oil Steel Steel                       6 - 8


    Product Applications

    Markets Served and Applications

    Pharmaceuticals, Food and Beverage Industries:

    • Batch processing
    • Brew kettles
    • Heat transfer systems and reactors
    • Milking & dairy systems
    • Ovens
    • Packaging equipment
    • Spray dryers and drying systems
    • Sterilizers
    • Transfer lines
    • Vats

    Oil, Gas, Petrochem, Chemical Industries:

    • Air dryers
    • Heat transfer systems
    • Lube and pump systems
    • Process gas heating
    • Process plants
    • Reactors
    • Tanks and reservoirs

    Power Industry:

    • Fuel gas and fuel oil heating
    • Flue gas and ESP heating
    • Tank and reservoir heating
    • Water wash systems

    Primary and Secondary Metals Processing:

    • Autoclaves
    • Heat transfer systems
    • Heat treat baths
    • Primary and secondary metals furnaces

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