Working principle:

When the valve is fed water from the inlet end,the water flows through the needle valve into the main valve control room,and the outlet pressure acts on the pllot valve through the catheter.When the outlet pressure is higher than the set value of the pilot valve spring,the pilot valve closes.The control room stops draining water.At this time,the pressure in the control room of the main valve increases and the main valve is closed,and the outlet pressure no longer rises.When the valve outlet pressure drops to the set pressure of the pilot valve spring,the pllot valve opens and the control room drains downstream.Because the displacement of the pllot valve system Is
greater than the inlet water of the needle valve,the pressure in the main valve control room decreases.Inlet pressure causes the main valve to open.In the stable state,the water inlet and drainage of the control room are the same,the opening of the main valve is unchanged,and the outlet pressure is stable.Oullet pressure can be set by adjusting the pilot valve spring.

Technical parameters:

Nominal Model:DN50-DN600
Nominal Pressure:PN16 N25
Applicable Temperature:0C-80℃
Applicable Medium:Water
Nominal Pressure:1.0Mpa-2.5Mpa
Design Standard:JB/T 10674-2006
Test Standard:GB/T 13927-2008

Main material：

lnstallation diagram：

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