Structural principle of pressure reducing valve

Structural Principle:

The throttling effect of the air inlet reduces pressure, and the pressure at the outlet is stabilized by the force balance effect on the diaphragm and the overflow effect of the overflow hole. The gas from the output port enters the lower cavity of the diaphragm through the feedback damping hole, forming an upward feedback force and spring force balance on the diaphragm. When the feedback force is greater than the handle spring force, the diaphragm moves up and the valve stem also moves down under the action of the reset spring, reducing the pressure reducing valve port and reducing the outlet pressure until a new balance is formed, and the outlet pressure stabilizes at a certain value.

 

Working Principle:

A pressure reducing valve adjusts the flow rate of the medium by controlling the opening of the opening and closing parts inside the valve body, reducing the pressure of the medium. At the same time, the opening of the opening and closing parts is adjusted with the help of the pressure behind the valve to maintain the pressure behind the valve within a certain range, and cooling water is sprayed into the valve body or behind the valve to reduce the temperature of the medium. This type of valve is called a pressure reducing and temperature reducing valve. The automatic selection of pressure reducing valves is included. The characteristic of this valve is to maintain the outlet pressure and temperature values within a certain range under the constant change of inlet pressure.