Air solenoid valve 3 way is an automatic basic component for controlling fluid, which belongs to actuator. Solenoid valves are used to control the direction of pneumatic flow. The mechanical devices in factories are generally controlled by hydraulic cylinders, so they will be used. Air solenoid valve 3 way blockades or leaks out different oil discharge holes by controlling the movement of valve body, and the oil intake holes are usually open. Hydraulic oil will enter different oil discharge pipes. Then the piston of the cylinder will be driven by the oil pressure of pneumatic solenoid valve, so the whole electricity will be controlled by controlling the current of solenoid of pneumatic solenoid valve. Mechanical motion of magnetic valve.