The sheathed heating element is a quasi-universal solution used to heat solids, liquids or gases through the Joule effect up to 800°C. It is a component of immersion heaters for the heating of fluids by natural or forced convection.

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Housed in a drilling or held against a part, it transfers its energy by conduction or when the temperature of the heating element is raised to a high temperature (>700°C), the energy is in this case transferred by infrared radiation for remote heating through the air.

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Heating elements are made of a metallic tube containing a resistive wound wire coil. Electrical grade magnesia powder provides electrical insulation between the coil and tube.

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The external metallic sheath with diameter Ø 6.8, 8, 8.5, 10.2 or 16 mm, available in various materials compatible with the fluid to be heated (carbon steel, stainless steel, Incoloy®, etc.) ensures watertightness and good shock and vibration resistance.

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They can be connected to the power supply via cables (waterproof or high temperature resistant) or by terminals (threaded, spade, Faston or hexagonal).

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Vulcanic sheathed heating elements can also be equipped with threaded union, pad or fixing clamp.

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For air heating applications, fins are installed along the length of the straight or U-shaped heating elements in order to improve heat exchange. This assembly is known as a finned strip heater.

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Vulcanic sheathed heating elements may be delivered straight or shaped according to specific requirements. Vulcanic also manufactures customised heating elements according to drawings or models.

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Heating elements

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Finned strip heaters

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Special heating elements

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