Product Detail Description

This valveopens whenthe pressure at the inlet excedsthe discharge pressure.A gradual rate ofopening prevents sudden opening surges.When a pressure reversal occurs the higherdownstream pressure isapplied to thecoverchamber through the control tube lines,andthe valve closes drip tight.This valve isideally suited for use where a positiveshutoffis required.The rubber disc assures tightsealing.

Thevelocity of Open/Shutoff can be controlledby the ball valve on the outlet control tubeline