Structural principle of pressure reducing valve（1）

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:

When the inlet pressure of the pressure reducing valve is greater than the set value, the valve core will close, preventing fluid from passing through; When the inlet pressure drops to a certain extent, the valve core will open under the action of the spring, allowing fluid to pass through. The spring and diaphragm or piston inside the valve body work together to regulate the outlet pressure of the valve and maintain stability.