The pneumatic ball valve has small flow resistance, unrestricted flow direction, and quick opening and closing. Compared with other types of valves, it has good comprehensive performance advantages. It is also a key research topic for domestic and foreign valve manufacturers. If the sealing surface material of the pneumatic ball valve is made of non-metallic materials such as tetrafluoroethylene, nylon 1010, polyimide, etc., the specific pressure q 20 MPa and temperature t 180 ℃ that the sealing material bears have greatly limited the application field of the pneumatic ball valve. At present, the sealing surface of domestic metal sealed pneumatic ball valve adopts nitriding treatment, hard chromium plating or spray welding CoCrW hard alloy and other hardening processes, but still can not solve the defects of sealing surface scratch under high pressure and wear resistance decline of sealing surface under high temperature. The project adopts spraying and other processes, and different spraying methods are adopted according to the service conditions, which can meet the requirements of valve operating parameters to the maximum extent.

When we purchase pneumatic ball valves for use, it will involve the upgrading of these products over a long period of time. When we update these products, the most important thing is to know what we need to do before replacing them. Only when we do a good job in these tasks can we ensure the smooth progress of product upgrading. So, what exactly do we need to do before upgrading?