Oversized 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
Oversized silent check valves(pic1)
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
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 | ||||
