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How should the matrix material of the mechanical seal be selected?
May 17, 2018

The requirements for auxiliary sealing materials are good elasticity, low friction coefficient, good wear resistance, heat resistance and low temperature resistance, resistance to media corrosion, dissolution and aging, etc. In addition, residual deformation is required after compression and long-term use. The commonly used auxiliary seal material is rubber and PTFE, in addition to Soft polyvinyl chloride.

1, PTFE Polytetrafluoroethylene advantages are chemical stability, oil resistance, resistance to dissolution, excellent moisture resistance, low friction coefficient, suitable for a variety of corrosive media, the disadvantage is that the elasticity is poorer than the rubber, easy to produce permanent deformation.

2, rubber Rubber has good elasticity, cushioning, vibration absorption, heat resistance, corrosion resistance. Rubber seals have a good sealing effect and are used most widely. The commonly used rubbers are silicone rubber, nitrile rubber, neoprene rubber and fluororubber.




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