The three-piece stainless steel pneumatic V-ball valve is composed of the valve body and the air torque pneumatic actuator, which opens and closes the valve by compressed air pressure to make the pneumatic actuator rotate at a 90 degree Angle. The body material is stainless steel 316, 304, WCB, FC. at pneumatic execution equipment material alloy aluminum oxidation treatment. The main sealing material is teflon. With flange, silk mouth, quick installation connection. There are two - and three-piece varieties. Is petroleum, chemical, electric power, pharmaceutical, biochemical, gas pipeline, mining, metallurgy, light industry, transportation, water supply, ships, boilers and other projects construction of the ideal supporting products.