DRVZ silent check valve

Short Description:

DRVZ silent check valve is mainly composed of valve body, valve seat, guide body, valve disc, bearing, spring and other main parts. The internal flow passage adopts streamline design, with minimal pressure loss. The opening and closing stroke of the valve disc is very short, which can be quickly closed when the pump is stopped to prevent the huge water hammer sound. It is mainly used in water supply and drainage, fire fighting, heating and ventilation system, and can be installed at the outlet of water pump to prevent backflow and water hammer damage to the pump.


Product Detail

OEM/ODM Service

Product Tags

DRVZ Technical parameters of silent check valve

Product model DRVZ
Nominal diameter 2”-12”(DN50-DN300)
Nominal pressure PN10/16/25
Applicable medium clean water
Applicable temperature -10℃~80℃

Material of main parts

Part name texture of material Part name texture of material
valve body GJS 500-7 shim EPDM
Disc GJS 500-7+EPDM Disc nut ANSI 304
Spring ANSI 304 Guide sleeve C61900
O-ring NBR Guide body GJS 500-7
Stem ANSI 304    

Main connection dimensions

Nominal diameter L D D1 N-Φd
DN(mm) NPS(in) PN10 PN16 PN25 PN10 PN16 PN25 PN10 PN16 PN25
50 2″ 150 165 165 165 125 125 125 4-Φ19 4-Φ19 4-Φ19
65 2.5″ 170 185 185 185 145 145 145 4-Φ19 4-Φ19 8-Φ19
80 3″ 180 200 200 200 160 160 160 8-Φ19 8-Φ19 8-Φ19
100 4″ 190 220 220 235 180 180 190 8-Φ19 8-Φ19 8-Φ23
125 5″ 200 250 250 270 210 210 220 8-Φ19 8-Φ19 8-Φ28
150 6″ 210 285 285 300 240 240 250 8-Φ23 8-Φ23 8-Φ28
200 8″ 230 340 340 360 295 295 310 8-Φ23 12-Φ23 12-Φ28
250 10″ 250 395 405 425 350 355 370 12-Φ33 12-Φ28 12-Φ31
300 12″ 270 445 460 485 400 410 430 12-Φ23 12-Φ28 16-Φ31

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