At present, the valves commonly used in the production of various industries in China are metal valves. The use of metal valves has a history of more than 100 years. Although the structure and materials have also been improved, due to the limitations of metal materials, they are increasingly unable to meet the needs of high wear, strong corrosion and other bad working conditions, mainly reflected in short service life and serious leakage, which greatly affects the stability of system operation. The traditional metal valves are in urgent need of thorough innovation in materials, design and manufacturing process
