Pneumatic ball valve has O-type ball valve and V-type ball valve. The o-ball valve adopts floating structure, the ball core is precision casting, the outer surface is plated with hard chromium, the valve seat is made of reinforced polytetrafluoroethylene, the flow port is the same as the pipe diameter, the flow capacity is great, the flow resistance is very small, and there is no leakage when it is closed, so it is generally used as on-off valve, especially suitable for high viscosity; the v-ball valve adopts fixed structure, the ball core has a V-notch, which can realize shearing. Fiber, granular media. According to different process equipment, pneumatic or electric actuator can be selected to form pneumatic ball valve and electric ball valve respectively. If the pneumatic ball valve wants to achieve proportional adjustment, it must be equipped with valve positioner electric ball valve. If it wants to achieve proportional adjustment, it must be equipped with electronic electric actuator or servo amplifier.