quiet check valve
technical parameter
item model number: cvkr
nominal diameter: dn300~600mm
nominal pressure: pn1.0~2.5mpa
applicable medium: water, oil, sea water, sewage
applicable temperature: 0~80℃
flange standard: gb/t17241.6, gb/t9113
test standard: gb/t13927, api598
product description
the silent check valve adopts a contour design that conforms to hydraulics to achieve a better streamlined waterway. the design with a guide fluid inside can ensure the minimum pressure loss. the silent check valve is installed at the water outlet of the pump and can be quickly closed before the water flows back to avoid water hammer, water hammer sound and flat breaking impact, so as to achieve the purpose of muteness, back flow prevention and equipment protection. silent check valve is widely used in water supply and drainage, fire protection, hvac, industrial and other systems.
the main technical parameters
dn | dn300~600mm |
pn | 1.0/1.6/2.5mpa |
operating temperature | 0℃-80℃ |
seal test | 1.1 times the nominal pressure |
shell test | 1.5 times the nominal pressure |
material description
no | part name | material |
1 | body | gg25 |
2 | disc | qa19-4 |
3 | bearing | qa19-4 |
4 | spring | sys316 |
5 | conductor | gg25 |
6 | seat | qa19-4 |
main dimensions (flange drilling according to gb/t17241.6 standard)
model | dn | d1 | d2 | d3 | n-φd | l | ||||
1.0mpa | 1.6 mpa | 1.0mpa | 1.6 mpa | 1.0mpa | 1.6 mpa | 1.0mpa | 1.6 mpa | |||
cvkr-0300 | dn300 | 370 | 400 | 410 | 460 | 12-13 | 12-28 | 181 | ||
cvkr-0350 | dn350 | 429 | 460 | 470 | 520 | 16-23 | 16-28 | 184 | ||
cvkr-0400 | dn400 | 480 | 515 | 525 | 580 | 16-28 | 16-31 | 191 | ||
cvkr-0450 | dn450 | 530 | 565 | 585 | 640 | 20-28 | 20-31 | 203 | ||
cvkr-0500 | dn500 | 582 | 620 | 650 | 715 | 20-28 | 20-34 | 219 | ||
cvkr-0600 | dn600 | 682 | 725 | 770 | 810 | 840 | 20-31 | 20-37 | 222 | |
cvkr-0700 | dn700 | 794 | 840 | 840 | 895 | 910 | 24-31 | 24-37 | 280 | |
cvkr-0800 | dn800 | 901 | 950 | 950 | 1015 | 1025 | 24-34 | 24-40 | 356 | |
cvkr-0900 | dn900 | 1001 | 1050 | 1050 | 1125 | 1125 | 28-40 | 28-40 | 368 | |
cvkr-1000 | dn1000 | 1112 | 1160 | 1170 | 1230 | 1255 | 28-43 | 28-43 | 432 | |
cvkr-1200 | dn1200 | 1380 | 1390 | 1455 | 1485 | 32-49 | 32-49 | 524 | ||