Working principle:
When the valve is fed from the inlet end,the water enters the main valve control room through the micro-filter,needle valve,checkvalve,and then drains downstream through the ball valve.Because the opening of the needle valve is less than the opening of the balvalve,that is,the drainage speed of the main valve control room is greater than the inlet speed,so the pressure of the control room isreduced,and the inlet pressure acting on the lower end of the main valve disc opens the main valve to supply water downstream.Pawn pipeWhen the water supply is stopped,if the downstream water begins to return,part of the return water enters the main controlroom through the ball valve,due to the function of the check valve,the return water cannot flow out of the main control room,causingthe main controlGradually increase the pressure in the chamber and slowly close the main valve.

 

Technical parameters:
Nominal Model:DN50-DN600
Nominal Pressure:PN16 N25
Applicable Temperature:0℃-80℃
Applicable Medium:Water
Nominal Pressure:1.0Mpa-2.5Mpa
Design Standard:JB/T 10674-2006
Test Standard:GB/T13927-2008