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DRVZ silence check valves
 

 

Product introduction
 

Silence check valves consists of valves body,seat,diversion shuttle,disc,bearing and spring etc..The bore is flow-line designed so pressure loss is very little.The disc's stroke is very short and when stop the pump the valves can close quickly and prevent the great noise from water-hammering so the valves can close quietly without any noise .It is widely used in feeding/draining system,fire protection and heat supplying system,and it is installed at the outlet of the pump to prevent backward fluid's and water-hammering's damage to the pump.


Main technical parameters
 

Nominal pressure: 1.0-2.5MPa
Nominal diameter: 50-350mm
Service:water,oils,sea water,sewage
Working temperature:0-80
Flanged end: GB/T17241.6 GB9113
Inspection and test: GB/T 13927 API 598


Typical installation diagram
 



Material 
Body and diversion shuttle: disc and shaft: spring
ductile cast iron seat,bearing, Al-bronze or Cr-stainless steel stainless steel

Main dimensions 
 

unit:mm

DN 40 50 65 80 100 125 150 200 250 300 350
L 110 120 150 180 229 254 267 292 330 356 381


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