Double Door Check Valve

Double Door Check Valves

Double Door Check Valves uses butt-installation and is used in the pipeline or on the pump outlet to, as a safety device, prevents the pump from inversed running due to the different water hammer's shock caused by the medium's back-flow in the pipeline when the pump stops. And it features by small volume, light weight, easy installation and maintenance, set with a guide device, flexible and quick close, preventing of huge medium's back-flow differential and forming silencing effect.

Suitable for the pipeline of water supply and drainage, warming etc. or the pump outlet to prevent both pump and pipeline from being damaged due to the medium's back-flow and water hammer's shock.

Specifications

Type PN
(MPa)		 Test Strength Pressure
(MPa)		 Test Seal performance (MPa) Working Temperature Applicable Fluid
H76X-10
H77X-10		 1.0 1.5 1.1 ≤ 80 °C Clean-water, Slops Sea
H76X-16
H77X-16		 1.6 2.4 1.76

Materials

Names Body Disc Stem Spring Seat
Materials GG 25, WCB, SS 304 / 316 GG 25, WCB, SS 304 / 316 SS 304 / 316 SS 304 / 316 NBR, SS 304 / 316

Dimensions

Dimensions of Double Door Check Valves
DN mm L H D
1.0 MPa 1.6 MPa
50 43 60 105 105
65 46 73 124 124
80 64 89 142 142
100 64 110 162 162
125 70 141 192 192
150 76 168 218 218
200 89 219 272 272
250 114 273 328 328
300 114 324 378 384
350 127 356 438 444
400 140 418 489 495
450 152 457 540 555
500 152 526 594 616
600 178 626 695 734
700 229 672 810 804
800 241 778 916 910
900 241 878 1016 1010
1000 300 914 1124 1128