A pneumatic control valve is a device that uses the principle of pneumatics to control fluid flow and pressure. It consists of a valve body, a valve core, a pneumatic actuator and piping.
OneBody:
The valve body is the main part of a pneumatic control valve and is usually made of materials such as cast iron, carbon steel, or stainless steel. Inlet and outlet channels are provided inside the valve body to control the flow of fluid.
IISpool:
The valve core is a part of a pneumatic control valve that controls fluid flow and pressure, and is usually made of stainless steel or copper. There are two types of spool structures: straight-through type and right-angle type, the straight-through type is suitable for occasions with large flow rates, and the right-angle type is suitable for occasions with small flow rates.
IIIPneumatic Actuators:
The pneumatic actuator is a key component in the pneumatic control valve, which controls the opening and closing of the valve core by receiving a gas signal. Pneumatic actuators are usually composed of cylinders and pistons, when the pneumatic actuator receives the gas signal, the piston in the cylinder will be affected by the air pressure, thereby changing the position of the valve core, to achieve the purpose of controlling the fluid flow and pressure.
FourthPiping:
Piping is the component that connects a pneumatic control valve to a fluid system, usually made of steel or stainless steel tubing. The role of the piping is to direct the fluid from the inlet to the valve body and out of the valve body.
FiveThe working principle of the pneumatic control valve is:
When the pneumatic actuator receives a gas signal, it adjusts the opening of the channel in the valve body by changing the position of the valve core, thereby controlling the flow and pressure of the fluid. When the pneumatic actuator receives a gas signal, the piston is subjected to air pressure, which changes the position of the spool, causing the gap between the spool and the seat to change, thereby adjusting the flow and pressure of the fluid.
Pneumatic control valves are widely used in industrial automation control systems, especially where frequent adjustment of fluid flow and pressure is required. It has the advantages of fast response, high reliability and high adjustment accuracy, and is widely used in petroleum, chemical, electric power, metallurgy and other industries.
Fujian Detersen valve***