How does pneumatic actuator control the opening of pneumatic ball valve?

The pneumatic actuator can only control the opening and closing of the valve without any accessories. However, the opening of the ball valve will be controlled under the following four conditions:

Actuator+solenoid valve. It is a common practice to add a solenoid valve to the actuator to control the valve opening well.

Actuator+electropneumatic positioner. The electro-pneumatic positioner can control the opening of any valve of the actuator; The electro-pneumatic positioner is expensive and cost-effective;

Actuator+three-stage limit switch box. Adding a three-stage limit switch box can control the open, half-open and closed positions of the valve, but can't control any angle. The three-level limit switch box is economical and can only control one position;

Pneumatic actuators's measurements. The metering pneumatic actuator consists of a standard double-acting actuator and two additional external cylinders. By changing the piston stroke of the additional cylinder, the rotation angle of the actuator and the valve stops at a preset angle, so the valve flow can be adjusted.

Metric pneumatic actuators

In addition, if the opening requirements are not high, or only three kinds of openings are needed, I personally suggest using a three-stage limit switch box to replace the electro-pneumatic positioner and solenoid valve. After all, a switch box costs three or four hundred dollars, while solenoid valves and electro-pneumatic positioners generally cost more than 1000.

Hope to adopt!