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DRVZ (H42X) Silent Check Valve

Release Date: November 28, 2015

Overview

Check valve

DRVZ (H42X) silent check valve is mainly composed of main parts such as valve body, valve seat, fluid guide, yoke , bearing and spring. The internal flow channel adopts streamline design with minimal pressure loss. The valve flap has a short opening and closing stroke. It can be quickly closed when the pump is stopped to prevent a huge water hammer sound. It has the feature of silent closing.
This valve is mainly used for water supply and drainage, fire protection, and HVAC systems. It can be installed at the outlet of the pump to prevent backflow and water hammer damage to the pump.

The main technical parameters

model

DRVZ-10

DRVZ-16

DRVZ-25Q

Nominal pressure

PN1.0MPa

PN1.6MPa

PN2.5MPa

Nominal diameter

DN50-350mm

Working pressure

1.0 MPa

1.6 MPa

2.5 MPa

Seal test pressure

1.0 MPa

1.6 MPa

2.5 MPa

Shell test pressure

1.5 MPa

2.4 MPa

3.75 MPa

Material of main parts

Valve body and fluid

grey cast iron

Ductile iron

Seat, bearing, disc, shaft

Aluminum bronze or stainless steel

spring

stainless steel

Main dimensions

(Flange size 1.0MPa according to GB4216.84 standard, PNl.6MPa according to GB4216.5-84 standard, PN2.5MPa according to GB9113.4 88 standard)

Nominal diameter

L

50

120

65

150

80

180

100

229

125

254

150

267

200

292

250

340

300

-

350

-