Pneumatic ball valve is a ball valve with a pneumatic actuator. The execution speed of the pneumatic actuator is relatively fast, and the fastest switching speed is 0.05 seconds/time, so it is usually called the pneumatic fast cutting ball valve. Pneumatic ball valve is usually configured with a variety of accessories, such as solenoid valve, air source processing triplet, limit switch, position, control box, etc., to achieve local control and remote centralized control, in the control room can control the valve switch, do not need to go to the scene or high altitude and dangerous to bring manual control, to a large extent, saving human resources and time, improve safety. Pneumatic ball valves are classified according to material: stainless steel pneumatic ball valves, plastic pneumatic ball valves, carbon steel pneumatic ball valves, cast iron pneumatic ball valves and so on. According to the number of classification of two pneumatic ball valves, three pne…