Pneumatic ball valve rotary valve is a rotating angle is 90 °, good sealing performance, large flow capacity, flow resistance coefficient is small, simple structure, convenient repair, long service life. Pneumatic ball valve is composed of a ball valve and pneumatic actuator, pneumatic actuator with AT type pneumatic actuator (single acting pneumatic actuator, double acting pneumatic actuator) and AW type pneumatic actuator (single acting pneumatic actuator, double acting pneumatic actuator). According to customer demand, the distribution of magnetic valve (DC 24V and AC220V), air filter relief pressure valve and valve position feedback, the realization of the valve cut off function. Also can match the valve positioner, the control signal 4-20mA