Pneumatic valves are valves driven by compressed air. The practice of specifying only specifications, categories, and pressure to meet procurement requirements during the procurement of pneumatic valves can be used to control the flow of various types of fluids such as air, water, Steam, various corrosive media, mud, oil, liquid metal, and radioactive media. In the current market economy environment is imperfect. Because pneumatic valve manufacturers, in order to compete for products, each under the idea of unified design of pneumatic valve, carried out different innovations, forming their own corporate standards and product personality. Therefore, it is necessary to put forward technical requirements in detail during the purchase of pneumatic valve and obtain consensus with the manufacturer as an annex to the procurement contract of pneumatic valve. Valves of this type should generally be installed horizontally in the pipeline.