Armored heating elements


The armored electric resistors are components suitable for the electric heating of liquid and gaseous fluids. These resistors are composed of heating elements, fixing elements (threaded nipples, threaded bushes, flanges, etc.) and electrical connection systems (terminal covers or connection cables). The heating elements can be “coupled” to the fixing elements and assembled to the electrical connection systems.

The heating elements consist of resistive wires (electrical resistances) inserted and isolated from the external tubular sheaths in which they are inserted. The electrical insulation between the resistances and the external tubular sheaths is obtained with a mineral insulator: magnesium oxide. Magnesium oxide, in addition to being a good electrical insulator, guarantees excellent heat transfer from the electrical resistance to the external tubular sheath. The external tubular sheaths can be of the electro-joined or without weldings type and can be realized in the following materials:

  • carbon steel,
  • stainless steel AISI 304 or AISI 321,
  • incoloy 800,
  • copper.

The fixing elements can be made of brass, carbon steel (untreated, galvanized or nickel-plated) or stainless steel and are “coupled” to the heating elements with welding systems (braze welding or tig) or caulking. The armored electric resistors can also be of the finned type, suitable for use in the air.

The use of “precious” metal alloys such as the Incoloy 800, the use of innovative equipment for the manufacture of heating elements, the adoption of the most modern welding and caulking systems combined with the use of the most modern testing equipment of the product, guarantees the manufacture of products with high performance and high quality and reliability.

On request, the armored electric resistors can be equipped with temperature detection systems. All types of armored electric resistors are components performed in accordance with the technical specifications required by the customer.