Classification of pneumatic control valve

Pneumatic control valve refers to all kinds of pneumatic components that control the pressure, flow and flow direction of air flow in pneumatic system and ensure the normal operation of pneumatic actuator or mechanism. The structure of pneumatic control valve can be divided into valve body (including valve seat and valve hole) and valve core. According to their relative positions, there are two types: normally closed type and normally open type. The valve can be divided into three types: cut-off valve, sliding column valve and sliding plate valve.

Pneumatic control valve refers to all kinds of pneumatic components that control the pressure, flow and flow direction of air flow in pneumatic system and ensure the normal operation of pneumatic actuator or mechanism. Control and regulation of compressed air pressure components known as pressure control valve.

Control and regulation of compressed air flow components known as flow control valve. The component that changes and controls the direction of air flow is called directional control valve.

In addition to the above three types of control valves, there are logic elements that can realize certain logic functions, including jet elements without movable parts and pneumatic logic elements with movable parts. In the structure principle, the logic element is basically the same as the direction control valve, only the volume and diameter are small, generally used to realize the logic operation function of the signal. In recent years, with the miniaturization of pneumatic components and the extensive application of PLC control in pneumatic system, the application scope of pneumatic logic components is gradually decreasing. From the control mode, pneumatic control can be divided into intermittent control and continuous control. In intermittent control system, pressure control valve, flow control valve and direction control valve are usually used to realize program action; In the continuous control system, besides pressure and flow control valves, servo and proportional control valves are also used to control the system continuously.