Air operated ball valve uses pneumatic actuator to help to drive the ball valve. Because pneumatic actuators operate at a reasonably high speed, with the quickest switching speed of 0.05 seconds / times, so that air operated ball valve is commonly referred to as pneumatic quick shut-off ball valves. Typically, the pneumatic ball valve is equipped with a variety of accessories such as a solenoid valve, a gas source treatment triad, a limit switch, a positioner, and control box in order to achieve both local control and long-distance centralized control. The valve switch can be controlled from the control room. It is not necessary to operate at risky environment.