Sealing ring is the general term for moving ring and static ring, is the most important component of mechanical seal. Sealing ring to a large extent determines the performance and life of the mechanical seal, therefore, made some of its requirements.
Adequate strength and stiffness
Under working conditions (such as pressure, temperature and sliding speed, etc.) are not damaged, the deformation should be as small as possible, working conditions remain stable when sealed. In particular, seal the end to have sufficient strength and a certain degree of corrosion resistance, to ensure that products have a satisfactory life.
Has a good thermal shock resistance
To this end, the material requires a higher thermal conductivity and smaller coefficient of linear expansion, withstand thermal shock will not crack.
Less friction coefficient
Seal ring should have a smaller friction coefficient.
Good self-lubricating
If the work of a short period of dry friction does not damage the seal face. Therefore, the seal ring should have good self-lubricating, sealing ring material and sealed fluid but also have good wettability.
Simple structure
Seal ring structure should strive to simple symmetry, giving priority to using the overall structure, can also be combined (such as mounted type) seal ring, try to avoid the use of sealed end spray structure.
Seal ring to be easy to manufacture
Easy installation and maintenance, the price should be low.