Silent check valve

Technical Parameter

Product model: DRVZ(H42X)

Nominal diameter: DN50-DN500

Nominal pressure: PN1.0MPa-2.5MPa

Applicable medium: water, oil, sea water, sewage

Applicable temperature: 0℃-80℃

Body material: cast iron, cast steel, ductile iron, stainless steel

Connection method: flange connection

Design standard: GB/T12235-2007

Length standard: GB/T12221-2005

Test standard: GB/T12224-2015

Flange standard: JB/T74-94, GB/T9113-2010


Product Detail

Product overview

The silent check valve is composed of valve body, valve seat, guiding fluid, valve disc, bearing bush and spring and other parts. The internal flow channel adopts a streamlined design, the pressure loss is small, the opening and closing stroke of the valve disc is very short, and the pump can be quickly closed when the pump is stopped, preventing the huge water hammer sound and forming a mute effect. The valve is mainly used in water supply, drainage, fire protection, and HVAC systems. It can be installed at the pump outlet to prevent medium backflow and water hammer damage to the pump.


Features

1. The internal flow channel of the silent check valve adopts a streamlined design, with small flow resistance and energy saving. It is closed by its own spring force to prevent water hammer.

2. When the pump is stopped, the valve disc has a short closing time in the multi-spring, which can be closed quickly, avoiding the generation of water hammer and preventing the huge water hammer sound, forming a mute effect.

3. The valve needs to be installed vertically (the axis of the valve body is vertical).


Main part material

Part NameMaterial
Body, guide fluidCast iron, cast steel
Seat, bearing bush, disc, shaftBronze or stainless steel
SpringStainless steel


The main technical parameters

Nominal pressure (MPa)1.01.62.5
Maximum working pressure1.01.62.5
Seal test pressure1.11.762.75
Shell test pressure1.52.43.75
Applicable mediaWater, oil, sea water, sewage
Medium temperatureX<80℃, T≤150℃, H≤200℃


Main external dimensions

Nominal diameterL
50120
65150
80180
100240
125300
150350
200450
250500
300550
350572
400600
450650
500700