Silent Check Valve

Silent Check Valve

Key Specifications / Features

China Silent Check Valve manufacturer Xinhai offers Cast Iron, Cast Steel Silent Check Valves, Stainless Steel Spring, PN1.0 - PN2.5, DN50 - 500mm.

Categories: Chinese Standard Check Valve

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Detail Information

Silent check valve is widely utilized for feedwater system and drain system. Valve disc is guided by central shaft at two ends, realizing on-off rapidly. The valve can be installed vertically or horizontally. The disc is loaded by spring which can close the valve quickly and reduce water hammer pressure effectively. Silent check valve has small volume, light weight and long service life.
The check valve consists of valve body, seat, baffle, valve disc, bushing, spring, etc. The inner channel adopts streamline design for low pressure losses and short closing stroke, which can close rapidly to avoid loud water hammer noise and keep silence. This kind of check valve is mainly installed at the exit of pump for feedwater, drain, fire protection and heating systems to avoid the damage to the pump caused by back flow of medium and water hammer.
Technical Parameter
Nominal Pressure(MPa) 1.0 1.6 2.5
Maximum Working  Pressure 1.0 1.6 2.5
Seal Test Pressure 1.1 1.76 2.75
Shell Test Pressure 1.5 2.4 3.75
Applicable Medium Water 
Medium Temperature X<80℃, T≤150℃, H≤200℃

Nominal Diameter (DN) L
50 120
65 150
80 180
100 240
125 300
150 350
200 450
250 500
300 550
350 572
400 600
450 650
500 700

Components Materials
Components Materials 
Body, baffle Cast iron, cast steel
Base, bushing, disc, shaft Bronze or stainless steel
Spring  Stainless steel 

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