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Summary
The flap of this valve is coated with rubber on its outer layer and its switching duration can be up to 1 million times. And it is, with the full-flow area design, features by small head loss, not easy piled-up of foreign matters and simple repair. Suitable for the water supply and drainage system, mounted in the pipeline or on the pump outlet, prevent both pump and pipeline from being damaged due to medium's back-flow and water hammer. It can also be mounted on the by-pass pipe for water in and out of a reservoir to assist the water of the reservoir to flow back to the water supply system.
Supplier: Saitai Valve, China
Manufacturer: Shop in Shanghai Qingpu Industrial Park
Technical Parameters
| PN(MPa) | 1.0 | 1.6 | 2.5 | |
| Test pressure (MPa) | Shell strength | 1.5 | 2.4 | 3.75 |
| Sealing performance | 1.1 | 1.76 | 2.75 | |
| Working temperature | =80°C | |||
| Applicable medium | Rinsing,Dead oil | |||
Materials
| Name of parts | Material |
| Body,Valve casing | Casting pig,Ductile iron |
| Disc | Rubber assembly |
| Spring | Stainless steel |
Dimensions
| DN mm | PN1.0 | PN1.6 | PN 2.5 | |||||||||||||||||||||
| L | b | f | D2 | D | D1 | Z-fd | H | L | b | f | D2 | D | D1 | Z-fd | H | L | b | f | D2 | D | D1 | Z-fd | H | |
| 40 | 165 | 18 | 2 | 85 | 150 | 110 | 4-18 | 180 | 165 | 18 | 2 | 85 | 150 | 110 | 4-18 | 180 | 165 | 18 | 2 | 85 | 150 | 110 | 4-18 | 180 |
| 50 | 200 | 20 | 3 | 102 | 165 | 125 | 4-18 | 190 | 200 | 20 | 3 | 102 | 165 | 125 | 4-18 | 190 | 200 | 20 | 3 | 99 | 165 | 125 | 4-18 | 190 |
| 65 | 215 | 20 | 3 | 122 | 185 | 145 | 4-18 | 210 | 215 | 20 | 3 | 122 | 185 | 145 | 4-18 | 210 | 215 | 22 | 3 | 118 | 185 | 145 | 8-18 | 210 |
| 80 | 240 | 22 | 3 | 133 | 200 | 160 | 8-18 | 230 | 240 | 22 | 3 | 133 | 200 | 160 | 8-18 | 230 | 240 | 24 | 3 | 132 | 200 | 160 | 8-18 | 230 |
| 100 | 290 | 24 | 3 | 158 | 220 | 180 | 8-18 | 250 | 290 | 24 | 3 | 158 | 220 | 180 | 8-18 | 250 | 290 | 24 | 3 | 156 | 235 | 190 | 8-22 | 250 |
| 125 | 330 | 26 | 3 | 184 | 250 | 210 | 8-18 | 280 | 330 | 26 | 3 | 184 | 250 | 210 | 8-18 | 280 | 330 | 26 | 3 | 184 | 270 | 220 | 8-26 | 280 |
| 150 | 355 | 26 | 3 | 212 | 285 | 240 | 8-22 | 315 | 355 | 26 | 3 | 212 | 285 | 240 | 8-22 | 315 | 355 | 28 | 3 | 211 | 300 | 250 | 8-26 | 315 |
| 200 | 500 | 28 | 3 | 268 | 340 | 295 | 8-22 | 370 | 500 | 30 | 3 | 268 | 340 | 295 | 12-22 | 370 | 500 | 30 | 3 | 274 | 360 | 310 | 12-26 | 370 |
| 250 | 620 | 28 | 3 | 320 | 395 | 350 | 12-22 | 430 | 620 | 32 | 3 | 320 | 405 | 355 | 12-26 | 430 | 620 | 32 | 3 | 330 | 425 | 370 | 12-30 | 430 |
| 300 | 700 | 28 | 4 | 370 | 445 | 400 | 12-22 | 475 | 700 | 32 | 4 | 370 | 460 | 410 | 12-26 | 475 | 700 | 34 | 4 | 389 | 485 | 430 | 16-30 | 475 |
| 350 | 785 | 30 | 4 | 428 | 500 | 460 | 16-22 | 550 | 785 | 36 | 4 | 428 | 520 | 470 | 16-26 | 550 | 785 | 38 | 4 | 450 | 555 | 490 | 16-33 | 550 |
| 400 | 915 | 32 | 4 | 482 | 565 | 515 | 16-26 | 600 | 915 | 38 | 4 | 482 | 580 | 525 | 16-30 | 600 | 915 | 40 | 4 | 505 | 620 | 550 | 16-36 | 600 |
Typical installation
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