The sealing ring is full of elasticity and resilience. The sealing ring has strong corrosion resistance, not easy to age, long working life, good wear resistance, and can automatically compensate to a certain extent after wear.
Within the working pressure and a certain temperature range, it should have good sealing performance, and can automatically improve the sealing performance with the increase of pressure. The friction between the sealing ring device and the moving parts should be small, and the friction coefficient should be stable.
In addition to the general requirements for sealing ring materials, the sealing ring should also pay attention to the following conditions: stable performance, not easy to swell in the medium, and small thermal shrinkage effect (Joule effect). Easy to process and form, and can maintain precise dimensions. Does not corrode the contact surface, does not pollute the medium, etc. The most suitable and commonly used material to meet the above requirements is rubber, so the sealing ring is mostly made of rubber material. There are many varieties of rubber, and new varieties of rubber appear constantly. When designing and selecting, you should understand the characteristics of various rubbers and choose them reasonably.