Structural principle of pressure reducing valve（4）

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:

The working principle is to reduce water pressure by relying on the local resistance of the flow channel inside the valve to the water flow. When the medium flows through the pressure reducing valve, the flow rate and kinetic energy of the fluid are changed by changing the throttling area, resulting in different pressure losses and achieving the purpose of pressure reduction. The outlet pressure of the pressure reducing valve can automatically maintain stability, which is achieved by combining it with the adjustment of the control and regulation system to balance the fluctuation of the pressure behind the valve with the spring force.