300X Slow-Closing Check Valve
300X slow-closing check valve structure and purpose
Used on the pump outlet of a water supply system to prevent medium’s back-flow, water hammer and water shock. It has three functions as an electric valve, check valve and water hammer remover. It is capable of improving the safety and reliability of the water supply system effectively through integrating the technical principle of slow-open, speed valve, slow-close, and removing water hammer and preventing of both pump-starting and pump-stopping water hammer. The gate can carry out open-close automatically upon the operation rules of the water pump just by operating the pump to open or close electrically. 300X Slow-Closing Check Valves features by the big flow and small pressure loss, reliable sealing performance, easy installation, debugging and maintenance and long duration.
300X slow-closing check valve external and connection dimensions
| DN(mm) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 700 | 800 | |
| L | 180 | 180 | 180 | 203 | 203 | 235 | 285 | 360 | 400 | 455 | 585 | 650 | 800 | 860 | 915 | 980 | 1075 | 1230 | 1300 | 1450 | |
| PN10 | D | 105 | 115 | 135 | 145 | 160 | 180 | 195 | 215 | 245 | 280 | 335 | 390 | 440 | 500 | 565 | 615 | 670 | 780 | 895 | 1010 |
| D1 | 75 | 85 | 100 | 110 | 125 | 145 | 160 | 180 | 210 | 240 | 295 | 350 | 400 | 460 | 515 | 565 | 620 | 725 | 840 | 950 | |
| PN16 | D | 105 | 115 | 135 | 145 | 160 | 180 | 195 | 215 | 245 | 280 | 335 | 405 | 460 | 520 | 580 | 640 | 705 | 840 | 910 | 1020 |
| D1 | 75 | 85 | 100 | 110 | 125 | 145 | 160 | 180 | 210 | 240 | 295 | 355 | 410 | 470 | 525 | 585 | 650 | 770 | 840 | 950 | |
| PN25 | D | 105 | 110 | 135 | 145 | 160 | 180 | 195 | 230 | 270 | 300 | 360 | 425 | 485 | 550 | 610 | 660 | 730 | 840 | 955 | 1070 |
| D1 | 75 | 85 | 100 | 110 | 125 | 145 | 160 | 190 | 220 | 250 | 310 | 370 | 430 | 490 | 550 | 600 | 660 | 770 | 875 | 990 | |
| H | 172 | 172 | 172 | 265 | 265 | 310 | 350 | 460 | 520 | 570 | 695 | 780 | 905 | 1025 | 1080 | 1030 | 1135 | 1270 | 1460 | 1640 | |
| H1 | 106 | 106 | 106 | 210 | 210 | 215 | 245 | 305 | 365 | 415 | 510 | 560 | 658 | 696 | 735 | 610 | 665 | 725 | 865 | 925 | |
Note: Either elastic seat ring sealed gate valve or butterfly valve can be selected in the schematic of installation. Recommend to select the butterfly valve in case of ≥DN350
300X slow-closing check valve main technical features
| Nominal Pressure | 1.0MPa | 1.6MPa | 2.5MPa |
| Shell test pressure | 1.5MPa | 2.4MPa | 3.75MPa |
| Sealed test pressure | 1.1MPa | 1.76MPa | 2.75MPa |
| Suitable temperature | ≤80℃ | ||
| Suitable medium | water | ||
300X slow-closing check valve schematic diagram of installation
