Flange Silent Check Valve
manufacturer: Shanghai MeiYan Yi Pump & Valve Co., Ltd.
E-mail: sales@1bengfa.com
Tel: +86 (21) 5640 2009
Mob: +86 138 1691 3072（WeChat Same Account）
product drawing
Flange silent check valves
Features and usages
DRVZ flange silent check valve primarily consists of body, seat, diversion body, disc, bearings and springs and other components. The internal flow channel adopts streamlined design, with a very small pressure loss, and the valve hoist stroke is very short. When stoping the pump, it can be quickly shut down, to prevent the huge sound of water hammer, and with a silent closure characteristic. The valve is mainly used for water supply and drainage, fire protection, HVAC systems, it can be installed on pump outlet, to prevent backflow and the pump damage caused by water hammer, effectively protecting the pump's normal operation.
Dimensions & constructral diagram
Flange silent check valve constructral diagram
Main technical parameter
| type | DRVZ-10 | DRVZ-16 | DRVZ-25Q | |
| nominal pressure PN (MPa) | 1.0 | 1.6 | 2.5 | |
| nominal diameter DN (mm) | 50～350 | |||
| maximum wrking pressure (Mpa) | 1.0 | 1.6 | 2.5 | |
| sealing test pressure (MPa) | 1.0 | 1.6 | 2.5 | |
| shell test pressure(MPa) | 1.5 | 2.4 | 3.75 | |
| the materials of main parts | body,diversion body | grey cast steel ductile cast iron | ||
| seat,bearing,disc,shaft | Al bronze or Cr stainless steel | |||
| spring | SS | |||
Main external dimensions
| nominal diameter DN (mm) | L |
| 50 | 120 |
| 65 | 150 |
| 80 | 180 |
| 100 | 229 |
| 125 | 254 |
| 150 | 268 |
| 200 | 292 |
| 250 | 330 |
