It is suitable for decompression from the pipeline, reducing the upstream high fluctuation pressure to the constant lower pressure required by users.

It is composed of main valve and pilot valve. The main valve and the pilot valve are separated. The pilot valve is the control part. Adjusting the loading force of the spring of the pilot valve can change the pressure at the outlet of the main valve to make it reach the set pressure value, and automatically keep the outlet pressure stable at the set value by using the feedback effect of the energy of the medium itself.

 

1. Valve body 2, ball valve 3, filter 4, large valve plate 5, shaft sleeve 6, cylinder seat 7, piston 8, valve stem 9, cylinder head
10. Pressure reducing pilot valve 11, filter 12, ball valve

Before the operation of the pressure reducing and stabilizing valve, both the main valve and the pilot valve are closed. When the valve is in use, the medium enters the inlet end and flows under the main valve plate. At the same time, part of the fluid flows to the upper part of the control piston through the connecting pipe and flows to the outlet through the pilot valve. At this time, the pressure at the outlet P2 is less than that at the inlet P1, Due to the effect of medium pressure, the main valve disc moves upward, the valve opens, and the medium flows to the outlet, and P2 rises accordingly. When the pressure P2 at the outlet is greater than the loading force of the regulating spring of the pilot valve, the medium will be fed back to the lower part of the pilot valve diaphragm through the connecting pipe C, which will push the pilot valve disc to move towards the closing direction, reduce the medium flow area, and increase the pressure Pb in the control chamber of the main valve through the connecting pipe, so as to make the main valve diaphragm move downward and push the main valve disc to close, so as to reduce the medium flowing through the main valve. At this time, the outlet pressure P2 decreases; on the contrary, if the outlet pressure P2 decreases, the medium pressure fed back to the lower part of the pilot valve diaphragm is less than the loading force of the regulating spring, which will make the pilot valve disc move towards the opening direction. Through the feedback effect, the pressure in the control chamber of the main valve will drop, and the main valve disc will move towards the opening direction, increasing the medium flow of the main valve and increasing the outlet pressure P2. It can be seen that moderate adjustment of the pilot valve adjusting screw can endow the pilot valve regulating spring with a certain loading force, that is to set a required pressure setting value for the valve in advance. When the pressure at the outlet of the valve changes, the pilot valve, control chamber and communication will make use of the feedback function of the medium to automatically control the pressure at the outlet end to make it basically stable at the set pressure value and ensure the normal operation of the pipeline.

Wide range of decompression and wide application.
The outlet pressure is stable at the set value and does not change with the change of upstream pressure.
With hydraulic automatic control system, pressure fluctuation is small.
Full channel valve body, large flow.
It is easy to adjust and maintain and reliable.

Nominal pressure: l.ompa, 1.6Mpa, 2.5MPa
Setting pressure: 1.0MPa: 0.09-0.9mpa
          1.6Mpa : 0.10-1.1Mpa
          2.5Mpa : 0.15-2.2Mpa
Applicable medium: water or fluid with physical and chemical properties similar to water.
Medium temperature: 0 ℃ - 9 ℃