Check Valve Series

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Oversized Silent Check Valve

manufacturer: Shanghai Fengqi Industry Development Co., Ltd.
Eml: sales@fengqi.sh.cn

Tel: 86 (21) 3652 8716
Mob: (86) 138 1635 6498

product drawing

Oversized silent check valves(pic1)
Oversized silent check valves(pic1)
Oversized silent check valve(pic2)
Oversized silent check valve(pic2)

Features and usages

CVKR oversized silent check valve is a large-diameter valve, using contour design that in line with hydraulics, gets a better streamlined waterways, the design of interior attached inverted fluids can ensure that the minimum pressure loss. The valve is usually installed in large pump outlet, which could close quickly before the water backflow, avoiding produce water hammer, water hammer noise and damaging impact, in order to achieve the purposes of silent and prevent backflow and protect the media equipments. The valves are widely used in large-scale water supply and drainage, fire protection, HVAC, industrial and other systems pipelines.

Dimensions & constructral diagram

Oversized silent check valve constructral diagram
Oversized silent check valve constructral diagram

Technical parameter

nominal diameter DN (mm) 50~600
working pressure MPa 1.0/1.6/2.5
working temperature ℃ -10~80
sealing test 1.1 times of nominal pressure
shell test 1.5 times of nominal pressure

The materials of main parts

No. part name material
1 body GG25
2 disc QA19-4
3 bearing QA19-4
4 spring SUS316
5 diversion body GG25
6 seat QA19-4

Main external dimensions (flange drilling according to GB/T17241.6-1998 standard)

type nominal diameter DN D1 D2 D3 N-фD L
1.0 MPa 1.6 MPa 1.0 MPa 1.6 MPa 1.0 MPa 1.6 MPa 1.0 MPa 1.6 MPa
CVKR-0300 300 370 400 410 460 12-13 12-28 181
CVKR-0350 350 429 460 470 520 16-23 16-28 184
CVKR-0400 400 480 515 525 580 16-28 16-31 191
CVKR-0450 450 530 565 585 640 20-28 20-31 203
CVKR-0500 500 582 620 650 715 20-28 20-34 219
CVKR-0600 600 682 725 770 810 840 20-31 20-37 222
CVKR-0700 700 794 840 840 895 910 24-31 24-37 280
CVKR-0800 800 901 950 950 1015 1025 24-34 24-40 356
CVKR-0900 900 1001 1050 1050 1125 1125 28-40 28-40 368
CVKR-1000 1000 1112 1160 1140 1230 1255 28/-43 28-43 432
CVKR-1200 1200 1328 1380 1390 1455 1485 32-49 32-49 524
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