Pneumatic control ball valves can be categorized by structure into pneumatic O-type control ball valves or pneumatic V-type control ball valves. Primarily used in conjunction with valve positioners, they receive 4-20mA control signals to regulate the rotational opening of the ball valve plug, achieving proportional control of pipeline parameters such as pressure, flow rate, and liquid level.
Pneumatic V-type control ball valves feature a specially shaped V-notch. They utilize changes in intermediate opening area to regulate flow and can shut off to trap impurities within the fluid. These valves are suitable for controlling pulp, slurry, and viscous fluids.