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Sic Silicon Carbide Seal

Sic silicon carbide seal is the most widely used friction material in mechanical seal. It has high chemical resistance, high mechanical strength, good wear resistance, high temperature resistance and good self-lubrication. In addition, sic sealing ring also has High fire resistant,...

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Sic silicon carbide seal is the most widely used friction material in mechanical seal. It has high chemical resistance, high mechanical strength, good wear resistance, high temperature resistance and good self-lubrication. In addition, sic sealing ring also has High fire resistant, heat-resistant shock, small size, light weight, high strength, good energy saving effect. It is a chemical pump sealing material used by chemical production enterprises.

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From the aspects of friction reduction, corrosion resistance and occlusion prevention, the Sic silicon carbide seal can ensure normal operation in the mechanical seal device.It is usually used as a hard ring for the moving ring, which has the following characteristics:

1) Sufficient strength and stiffness. Under the working condition, the ring is not damaged, the deformation is small, and the sealing condition can be maintained even when the working conditions fluctuate.

2) Good frictional properties. It can keep the fluid film with good lubricity and good boundary lubrication performance.It can ensure that the end face of the sealing ring can continue to operate when it is always in contact and rotated.It can guarantee a satisfactory service life under working conditions.

 3) Good thermal conductivity, heat resistance and thermal shock resistance. During operation, the seal ring is at a higher operating temperature and a sharp change of temperature. The silicon carbide sealing ring does not crack when it subjected to thermal shock.Because it has a high thermal conductivity and a small coefficient of linear expansion.

4) Good corrosion resistance. The corrosion-resistant sealing ring can resist corrosion and wear of the fluid, resulting in long working life. In addition to the above properties, it has low density and low permeability and good self-lubricity.

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Only silicon carbide meets all of the above requirements. Therefore, they are currently the most widely used seals.


SPECIFICATION

Item

Unit

Data

Max. working temperature

1380

Density

g/cm3

≥3.02

Porosity

%

<0.1

Bending strength

MPa

250(20℃)

Bending strength

MPa

280(1200℃)

Modulus of elasticity

GPa

330(20℃)

Modulus of elasticity

GPa

300(1200℃)

Thermal conductivity

W/m.k

45(1200℃)

Coefficient of thermal expansion

K-1×10-6

4.5

Rigidity


13

Acid alkaline-proof


Excellent


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