Pneumatic control valve classification
Pneumatic control valve refers to various pneumatic components that control the pressure, flow and flow direction of air flow in the pneumatic system and ensure the normal operation of pneumatic actuators or mechanisms.
The element that controls and regulates the pressure of compressed air is called a pressure control valve.
The element that controls and regulates the flow of compressed air is called a flow control valve.
An element that changes and controls the direction of airflow is called a directional control valve.
In addition to the above three types of control valves, there are also logic elements that can realize certain logic functions, including jet elements without moving parts inside the elements and pneumatic logic elements with moving parts. In terms of structure, the logic element is basically the same as the directional control valve, only the volume and diameter are smaller, and it is generally used to realize the logic operation function of the signal.
In recent years, with the miniaturization of pneumatic components and the large-scale application of PLC control in pneumatic systems, the application scope of pneumatic logic components is gradually decreasing.
From the point of control, pneumatic control can be divided into two categories: intermittent control and continuous control. In intermittent control systems, pressure control valves, flow control valves and directional control valves are usually used to realize program actions; in continuous control systems, in addition to pressure and flow control valves, servo and proportional control valves are also used. , for continuous control of the system.
