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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style elements, with the enlarged cold ends, were one of the earliest designs of the heating elements, which were originally made oversized to increase the cold end cross section, lowering electrical resistance so as to lower the operating temperature of the cold ends.

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 1.70�©

Specified as:

SPK DB18/28/300/350/1.70

Silicon Carbide Heating Element General Description



Silicon carbide heating element is a kind of non-metal high temperature electric heating element. It is made of selected high quality green silicon carbide as main material, which is made into blank, siliconization under high temperature and recrystallized. It is the most popular type of economical heating element capable of operating under hot and rigorous environments.



Silicon Carbide Heating Element Features



1. withstands as high as 1600�°C

2. high strength and excellent shock resistance

3. heat source is free of noise and air pollution

4. anti-oxidization, anti- corrosion

5. easy to installation and maintenance



Applications of Silicon Carbide Heating Element



There are ED, U, W, H, Gun, Single Spiral, Double Spirals, Dumbbel, Door-like types and etc. which are widely used in various high temperature electric furnaces in air, vacuum and other protection gas environments and other electric heating devices, such as industries of magnet, ceramics, powder metallurgy, glass and machinery, etc.

Silicon Carbide Heating Elements Complete Specifications 0

Silicon Carbide Heating Elements Complete Specifications 1

Normally the following should be given when describing any type of SiC heating elements:

Type: ED, U, W, SC, SCR, DB,G, H, or DM
Outside Diameter (OD) : mm
Length of Hot Zone (HZ) :mm
Length of Cold Zone (CZ) :mm
Length of Overall(OL):mm
Center Distance (A) :mm
Resistance at 105050


Physical property of SIC heating element

specific gravity 2628gcm bend strength 300kg
hardness 9MOHS tensile strength 150kgcm
porosity rate

Silicon Carbide Heating ElementDescription



Silicon Carbide Heating Element can be installed and replaced while the tin bath is operation. The heaters can be installed through the side-seal, or through the side of the bath roof, and are commonly used to extend campaign lives, where conventional elements in the side zones have been broken, and insufficient power is available.



Silicon Carbide Heating Element Advantages



High purity raw materials;

High structural density;

Slow aging;

Maximum temperature being up to 1500â?? (2732�°F);

Easy to be installed and replaced.



Types and Applications of Silicon Carbide Heating Element

1. SW (Standard)

SW Silicon Carbides are used in applications ranging in temperature from 600�°C up to 1400�°C in both air and controlled atmospheres. Although the type of atmosphere used will determine the maximum recommended element temperature. This kind of silicon carbide elements can be mounted either vertically or horizontally.

2. U-TYPE

U shape Silicon Carbide is consists of two silicon carbide rod with same diameter. Each rod has both hot zone and cold end with identical resistance. Two rods are connected by the low resistance SiC. Also the connector could be used as holder according to different requirements.

3. W-TYPE

3-phase elements are available in 2 different types: SGC (Dumbbell), SGD(Standard).

These elements are self-bonded silicon carbide formed by re-crystallization of silicon carbide at high temperature. It consists of three high-purity silicon carbide rods connected at one end by a silicon carbide crossbar. SGC elements are designed for vertical installation in standard float glass bathes and SGD elements for horizontal installation. They can be connected directly on three-phase power supply and is a one-side terminal type which permits drawing out the terminals from the roof of the furnace.

4. Single Spiral Silicon Carbide and Double Spiral Silicon Carbide:

They are made from silicon Carbide powder, and have two shapes: single and double sprial silicon carbide heating element. They are widely used in all kinds of kilns and furnaces.