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Summary
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.
Supplier: Saitai Valve, China
Manufacturer: Shop in Shanghai Qingpu Industrial Park
Technical Parameters
| Type | PN(MPa) | Test strength pressure(MPa) | Test Seal performance (MPa) | Working temperature | Applicable medium |
| 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
| Name of parts | Body | Disc | Stem | Spring | seat |
| Material | C.l ,Bowl-shaped steel, Stainless steel | C.l ,Bowl-shaped steel, Stainless steel | Stainless steel | Stainless steel | NBR,Stainless steel |
Dimensions
| DN mm | L | H | D | |
| 1.0MPa | 1.6MPa | |||
| 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 |
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Catalog:Check Valves