Because the medium to be sealed is different and the working premises of the equipment are different, different adaptability of the sealing material is required.
4. The sealing material has good anti-erosion performance, can work for a long time in acid, alkali, oil and other media, its volume and hardness change is small, and it does not adhere to the metal surface;
5. The sealing material is not softened or decomposed at high temperature, nor hardened or brittle at low temperature;
8. Convenient processing and manufacturing of sealing materials, cheap price, easy to get materials.
Rubber is the most commonly used sealing material. In addition to rubber, graphite, PTFE, and various sealants are suitable for sealing materials.