The regulatory valve for controlling the pressure after controlling valves, the valve effect is closed. The working principle is as follows:

The medium flows into the valve body from the direction of the arrow, and is output after flowing through the valve seat and valve core. Another way to take the pressure pipe (medium when the medium is steam) is introduced into the execution mechanism to act on the film, so that the valve core will be displaced accordingly to achieve the purpose of decompression and regulation. If the pressure of the valve increases, the force on the membrane is increased, the reducing spring, driving the valve core, and the opening degree of the valve, until the pressure drops to the set value until the valve is reduced. In the same way, if the pressure after the valve decreases, the force acts on the membrane is reduced. Due to the reaction force of the spring, it drives the valve core to increase the opening of the valve until the pressure of the valve rises to the set value.