Description of the type and use of sealing materials

The sealing material should meet the requirements of the sealing function. Because of the different media being sealed and the different working conditions of the equipment, the sealing materials are required to have different adaptability. The factory concluded that the requirements for sealing materials are generally:

1. Have proper mechanical strength and hardness;

2. The material has good compactness and is not easy to leak media;

3. Good compressibility and resilience, and small permanent deformation;

4, good anti-erosion function, long-term work in acid, alkali, oil and other media, its volume and hardness change is small, and does not adhere to the metal surface;

5, does not soften under high temperature, does not decompose, does not harden at low temperature, not brittle;

6. The friction coefficient is small and the wear resistance is good;

7, has a softness combined with the sealing surface;

8, processing and manufacturing convenience, the price is cheap, easy to take.

9, good aging resistance, durable;

Rubber is the most commonly used sealing material. In addition to rubber, graphite, etc., PTFE and various sealants are suitable for sealing materials.