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Immersion Electric Heating Resistors for Oil

Resistors for oil (lubricating, hydraulic, quenching) require a significantly lower power density than water heaters: mineral oils have lower thermal conductivity, and if the heater surface runs too hot relative to the fluid, localised "coking" of the oil can occur, reducing efficiency and creating a fire risk. Correctly sizing the power density (W/cm²) is therefore the critical parameter.

  • Reduced power density compared to water to avoid thermal degradation and coking of the oil
  • AISI 304/316 sheath with a finish suited to prolonged contact with mineral oils
  • ATEX certification when operating temperature approaches the oil's flash point or in the presence of vapours
  • Typical use: hydraulic oil tanks, quenching baths, lubrication units, hydraulic power packs
  • Safety thermostat and level control to prevent dry-running

The technical drawing below shows an example configuration: use the guided configurator to tell us the power, length, dimensions and operating temperature of your oil application.

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Illustrative example

Intended use: Oil

The values shown in the drawing are an indicative reference to help you read the technical diagram: they do not correspond to a real model, price or product specification.

TECHNICAL DIAGRAM — OIL ILLUSTRATIVE EXAMPLE — indicative values, not a real product specification NON-ATEX POWER 12 kW LENGTH 1800 mm DIMENSIONS Ø 42 mm, filettatura 1" GAS OPERATING TEMP. 250 °C Generic technical drawing, not to scale — actual dimensions will be confirmed in the quote.

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Frequently asked questions

Mineral oils have lower thermal conductivity: if the heater surface runs too hot relative to the fluid, localised "coking" of the oil can occur, reducing efficiency and creating a fire risk. A lower power density avoids this degradation.
In hydraulic oil tanks, quenching baths, lubrication units and hydraulic power packs — for lubricating, hydraulic or quenching oils.
When the operating temperature approaches the oil's flash point or in the presence of vapours. The sheath is AISI 304/316 with a finish suited to prolonged contact with mineral oils, plus a safety thermostat and level control to prevent dry-running.