DB ( Dumbbell ) Type Silicon Carbide Heating Element for Furnaces

Silicon carbide (SiC) Heating Element is a kind of non-metal rod or tube shape high temperature electric heating element.It is made of selected super purity green hexagonal silicon carbide as main material, which is made into blank and silicon crystal under high temperature of 2400ºC. In oxidizing atmosphere, its service temperature can reach 1450°C and continuous use life can reach 2000 hours.

The Dumbbell style elements, with the enlarged cold ends, were one of the earliest designs of the heating elements, which were originally made oversized to increase the cold end cross section, lowering electrical resistance so as to lower the operating temperature of the cold ends. Modern Dumbbell elements, by contrast, all employ an advanced technology to keep the terminal ends cool by virtue of the decreased resistivity of the lower resistance of the material of the cold ends in the manufacturing process. Therefore, oversized cold ends are no longer necessary. Non-dumbbell or ED type elements can substituted for Dumbbell elements.

Physical property of SIC heating element

Following should be provided when inquiring or ordering DB (Dumbbell) Silicon Carbide Heating Elements:

Type: DB

Outer Diameters: of the Hot Zone (D1) and of the Cold Zone (D2), mm

Length: of the Heating Section or the Hot Zone, HZ, mm

Length: of the Cold Zone, CZ, mm

Overall Length: OL, mm

Example: Type DB, D1/ D2=18/28mm, HZ=300mm, CZ=350mm, OL=1000mm, Resistance 1.70Ω

Specified as:

SPK DB18/28/300/350/1.70Ω