Pneumatic ball valve can change the flow direction of medium, with small fluid resistance, good sealing performance and wide application range. If the pneumatic ball valve leaks, the gas will not pollute the environment and is relatively safe. The disadvantage is that the seat ring of pneumatic ball valve is inert to all chemicals. The pneumatic ball valve is described in detail below. For ball valve or pneumatic ball valve, the power and gas supply must be disconnected first. The soft sealing ball valve generally adopts polytetrafluoroethylene as the sealing material, and the sealing surface of the hard sealing ball valve adopts metal surface treatment. If the ball valve passing through the pipeline needs to be cleaned, attention shall be paid to prevent damage to the sealing ring and leakage during disassembly.

　　Advantages of pneumatic ball valve:

　　1、 The pipe section with small fluid resistance and resistance correlation coefficient greater than or equal to the same time length.

　　2、 Simple structure, small size and light weight.

　　3、 Tight and reliable, plastic is widely used as sealing material of ball valve. It has a good sealing material performance and has been widely used in vacuum environment systems.

　　4、 Easy to operate, fast to open and close, only 90 ° rotation from full open to full close, convenient for remote control.

　　5、 It is convenient for maintenance, simple structure of pneumatic ball valve, removable seal ring and convenient for disassembly and replacement.

　　6、 When the valve is fully open or closed, the sealing surfaces of the ball and valve seat are isolated from the medium. When the medium passes through, it will not cause the erosion of the valve sealing surface.

　　7、 It has a wide range of applications, from small diameter to several millimeters to several meters, from high vacuum to high pressure.

　　8、 Since the power source of pneumatic ball valve is gas, the pressure is generally 0.2-0.8MPa, which is relatively full. If the pneumatic ball valve leaks, compared with hydraulic and electric valves, the gas can be discharged directly, without pollution to the environment and with high safety.

　　9、 Compared with the manual and turbine rotary ball valves, the pneumatic ball valves can be configured with large diameters. (The manual and turbine rotary ball valves are generally below the diameter of DN300, and the pneumatic ball valves can reach the diameter of DN1200 at present.