Immersion Heaters
Immersion Heaters

Delta Immersion flanged heaters consist of hairpin bent tubular elements welded or brazed into a flange. Flange heaters are installed by bolting to a matching flange welded to the tank wall or nozzle. Screw plug immersion heaters consist of hairpin bent tubular elements brazed or welded into a screw plug and can be provided with wiring boxes for electrical connections. Screw plug immersion heaters are screwed directly through a threaded opening in a tank wall or through matching pipe coupling; half coupling. Screw plug immersion heaters are used for heating liquids in a variety of processes. Those heaters are ideal for process water heating and freeze protection. All types of oils and heat transfer solutions can also be heated using these compact easily controlled units. The direct immersion method is energy efficient and well suited for many applications. A wide selection of immersion heaters are available, kilowatt ratings, voltages, sheath materials, terminal housings, and thermostats makes these compact heaters ideal for all types of applications.
For more information about immersion heaters, download the Immersion Heater section of our product catalog or contact us to order.
Screw Plug Immersion Heaters

Features of screw plug immersion heaters:
- Stainless steel or brass screw plug
- 1” to 2.5” NPT
- Hairpin-shaped incoloy elements
- 80/20 nickel chrome resistance wires
- High-purity magnesium oxide fillers
- Welded or brazed construction
- Thermostats available in housing
- NEMA 1 housing standard
- NEMA 4/7 housing optional
Popular applications of screw plug immersion heaters include: tank heating of liquids, air heating, direct heating of liquids, freeze protection.
For more information about screw plug immersion heaters, download the Screw Plug Immersion Heaters section of our product catalog or contact us to order.
Flanged Immersion Heaters

Features of flanged immersion heaters:
- ANSI raised face flanges
- Incoloy elements standard
- Welded or brazed construction
- NEMA 1 housing standard
- NEMA 4/7 housing optional
- Built-in thermostats available
- ASME code stamped optional
Popular applications of flanged immersion heaters include: hot liquid storage, preheating oils, heat transfer systems, process air and gas heating, food process equipment, freeze protection, boiler heating.
For more information about flanged immersion heaters, download the Flanged Immersion Heaters section of our product catalog or contact us to order.
Circulation Heaters – Flanged or Screw Plug

Features of circulation heaters:
- Incoloy elements
- Steel or stainless steel construction
- NPT or flanged connections
- NEMA 1 housing standard
- NEMA 4/7 housing optional
- Built-in thermostats available
- ASME code welding and stamp optional
Popular applications of circulation heaters include: high-temperature heating, steam superheating, air and gas heating.
For more information about circulation heaters, download the Circulation Heaters – Flanged & Screw Plug section of our product catalog or contact us to order.
Cartridge Heaters

Delta high-watt density cartridge heaters are fully swaged and can be applied wherever high temperature cartridge heaters are used. High-watt density cartridge heaters will deliver temperatures of 1,200 degrees Fahrenheit on the high-temperature alloy sheath. High quality nickel-chromium resistance wire used throughout assures reliable performance at elevated temperatures. Nickel pins or leads are swaged into the ceramic end cap, at the lead end of the cartridge. Standard 10” nickel, 450-degree Celsius fiberglass-insulated leads with insulation rated at 300 or 600 volts are supplied, optional lead types are available. High-purity magnesium oxide cores and filler materials swaged to rock-hard condition provide superb dielectric strength, while conducting maximum heat from the nickel chrome resistance coil. Metric and inch based dimensions are available.
Delta low watt density cartridge heater application can be efficiently designed using the low density cartridge. Quality and long life are not lost when specifying this heater to your application in molds, platens, and liquids. High quality magnesium oxide insulation and nickel-chromium resistance wires are used throughout the product. Standard and custom designs with various terminations are available.
For more information about high-watt density cartridge heaters, download the …section of our product catalog or contact us to order.