Views: 0 Author: Site Editor Publish Time: 2024-10-17 Origin: Site
Because the sealed media are different and the working conditions of the equipment are different, the sealing materials are required to have different adaptability, and the sealing materials should meet the requirements of the sealing function. The requirements for sealing materials are generally:
1. The material has good density and is not easy to leak the medium.
2. It has appropriate mechanical strength and hardness.
3. It has good compressibility and resilience, and small permanent deformation.
4. It does not soften or decompose at high temperatures, and does not harden or crack at low temperatures.
5. It has good corrosion resistance and can work for a long time in media such as acid, alkali, and oil. Its volume and hardness change little, and it does not adhere to the metal surface.
6. It has a small friction coefficient and good wear resistance.
7. It has the softness to combine with the sealing surface.
8. It has good aging resistance and is durable.
9. It is easy to process and manufacture, cheap, and easy to obtain.
In addition to rubber, rubber is the most commonly used sealing material. Other materials suitable for sealing include graphite, polytetrafluoroethylene, and various sealants.