1. Tungsten carbide (WC): good wear resistance and corrosion resistance, widely used in pumps for acid, alkali and other chemical media.
2. Ceramics: wear resistance, corrosion resistance, high temperature resistance are very good, commonly used in pumping oxidizing media.
3. Silicon carbide (SiC): excellent corrosion resistance and high temperature resistance, commonly used in strong acid, alkali and other media pump.
4. Metal-ceramic: due to its better wear resistance and corrosion resistance, it can be widely used in media containing solid particles, such as mud, sewage.
5. Aluminum oxide (Al2O3): wear-resistant, good corrosion resistance, can be widely used in acid, alkali and other chemical media pump.
6. Polytetrafluoroethylene (PTFE): for most chemical media have good corrosion resistance, but there will be decomposition in high temperature environment, suitable for some low temperature media.
Need to choose the right material according to the specific use of the environment and the characteristics of the medium to ensure the service life and performance of the mechanical seal.