Application

The AX742X Safety Relief/Pressure Retaining Valve produced by our company is mainly installed in the pipelines of high-rise buildings, fire water supply systems and other water supply systems. When the pressure in the water supply pipeline exceeds the set pressure of the relief valve, the relief valve automatically opens to release pressure quickly, protecting the safety of the pipeline. It can also be used as a pressure retaining valve to ensure the water supply pressure upstream of the main valve.

AX742X Safety Relief/Holding Valve Product Diagram

Features

1.It can accurately maintain a constant safe set pressure. Once overpressure occurs, the relief valve opens quickly to release pressure in a timely manner.

2.The closing is smooth and reliable, eliminating pressure afterwaves and water hammer.

Working Principle

Pressure is transmitted through the hydraulic conduit, enabling the main valve slide plate (disc) to mimic the action of the pilot valve. When the upstream pressure is lower than the pilot valve's set value, the pilot valve closes, and the upstream pressure acts on top of the diaphragm to keep the main valve closed. Once the upstream pressure rises above the pilot valve's set pressure, the pilot valve opens to discharge the pressure water above the diaphragm, the main valve opens for massive water discharge, and it closes slowly and smoothly only after the pressure drops to the set value, without secondary water hammer.

AX742X Safety Relief/Holding Valve Structure Diagram

Main Parts and Materials

Main Technical Parameters

AX742X Safety Relief/Holding Valve Outline Dimensional Drawing

AX742X Safety Relief/Holding Valve Dimensions Table

Main Overall Dimensions