Slow closing check valve, also known as the reverse valve, its role is to prevent the media flow back in the pipeline. Opening and closing parts by medium flow and force to open or close, in order to prevent the medium flow back valve.
Check valve belongs to the automatic valve, mainly used for medium one-way flow pipeline, only allow medium to flow in one direction, in order to prevent accidents.
This type valve shall generally install horizontally in the pipeline. Through the up and down movement of the hydraulic cylinder plug, it assists the valve disc to quickly open and close to achieve the sealing surface, and realize fast closing and stable closing.
1. Small flow resistance. The medium channel inside the valve body is straight through, the medium flows in a straight line, and the flow resistance is small.
2. Less effort when opening and closing. Compared with traditional check valves, it opens more quickly with the help of counterweight and hydraulic cylinder.
3. Large opening degree, fast opening and closing time.
4. water hammer phenomenon is not easy to produce. Effectively prevent impact vibration.
5. the body is simple, the manufacturing technology is good, the application scope is wide.
6. Compact structure, good rigidity of valve, smooth channel, small flow resistance, stainless steel sealing surface, long service life, rubber sealing ring, reliable sealing, light and flexible operation.
| DN | L | D | D1 | n-φd | |||
| PN1.6 | PN2.5 | PN1.6 | PN2.5 | PN1.6 | PN2.5 | ||
| 50 | 230 | 160 | 160 | 125 | 125 | 4-18 | 4-18 |
| 65 | 290 | 180 | 180 | 145 | 145 | 4-18 | 8-18 |
| 80 | 310 | 195 | 195 | 160 | 160 | 8-18 | 8-18 |
| 100 | 350 | 215 | 230 | 180 | 190 | 8-18 | 8-23 |
| 125 | 400 | 245 | 270 | 210 | 220 | 8-18 | 8-25 |
| 150 | 480 | 280 | 300 | 240 | 250 | 8-23 | 8-25 |
| 200 | 500 | 335 | 360 | 295 | 310 | 12-23 | 12-25 |
| 250 | 600 | 405 | 425 | 355 | 370 | 12-25 | 12-30 |
| 300 | 700 | 460 | 485 | 410 | 430 | 12-25 | 12-30 |
| 350 | 800 | 520 | 550 | 470 | 490 | 16-25 | 16-30 |
| 400 | 900 | 580 | 610 | 525 | 550 | 16-30 | 16-34 |
| 500 | 1100 | 705 | 730 | 650 | 660 | 20-30 | 16-34 |
| 600 | 1300 | 840 | 840 | 770 | 770 | 20-34 | 16-41 |
