Description
DKV 300X slow closing check valve is an intelligent valve installed at the outlet of water pumps in high-rise building water supply systems and other water supply systems to prevent medium backflow, water hammer and water hammer. The valve has three functions of electric valve, check valve and water hammer eliminator, which can effectively improve the safety and reliability of water supply system. It integrates the technical principles of slow opening, fast closing and slow closing to eliminate water hammer, and prevents the occurrence of pump start water hammer and pump stop water. Just operate the water pump motor start and stop button, the valve can automatically open and close according to the water pump operating procedures, with large flow and small pressure loss. It is suitable for valves below 600 caliber.
Part Name | Material |
Valve Body | Stainless Steel, Cast Iron, Cast Steel, Steel, Ductile Iron |
Filter | Copper |
Regulator | Copper |
Valve Stem | Stainless Steel |
Diaphragm and Pressure Plate | Nitrile Rubber, Ductile Iron |
Upper Cover | Ductile Iron, Bronze |
Slow – closing Valve Plate | Stainless Steel |
Spring | Silicon – manganese Steel, Stainless Steel |
Large Valve Disk | Ductile Iron |
Valve Seat | Copper, Stainless Steel |
Diaphragm Seat | Cast Iron, Cast Steel, Steel, Ductile Iron |
Regulating Valve | Copper |
Filter | Copper |
Performance Specifications
Nominal Pressure (MPa) | Test Pressure (MPa) | Applicable Medium | Suitable Medium Temperature |
1 | 1.5 | Shell | Clean Water and Sewage without Impurities |
1.6 | 2.4 | Seal | ≤80°C |
2.5 | 4 | Clean Water and Sewage without Impurities | ≤80°C |
Outline and connecting measurememt

Nominal pressure (MPa) | 25 | 32 | 40 | 50 | 60 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 |
L | 160 | 180 | 203 | 203 | 216 | 241 | 292 | 300 | 356 | 457 | 495 | 540 | 686 | 762 | 864 | 914 |
PN 10 | D | 115 | 135 | 145 | 160 | 180 | 195 | 215 | 245 | 280 | 385 | 390 | 440 | 500 | 585 | 615 | 670 |
D1 | 85 | 100 | 110 | 125 | 145 | 160 | 180 | 210 | 240 | 295 | 350 | 400 | 460 | 515 | 565 | 620 |
PN16 | D | 115 | 135 | 145 | 160 | 180 | 195 | 215 | 245 | 280 | 335 | 405 | 480 | 520 | 580 | 640 | 705 |
D1 | 85 | 100 | 110 | 125 | 145 | 160 | 180 | 210 | 240 | 295 | 355 | 410 | 470 | 525 | 585 | 650 |
PN 25 | D | 110 | 135 | 145 | 160 | 180 | 195 | 230 | 270 | 300 | 360 | 425 | 485 | 550 | 610 | 660 | 730 |
D1 | 85 | 100 | 110 | 125 | 145 | 160 | 190 | 220 | 250 | 310 | 370 | 430 | 490 | 550 | 600 | 660 |
H | 172 | 172 | 265 | 265 | 310 | 350 | 460 | 520 | 570 | 695 | 780 | 595 | 1025 | 1080 | 1080 | 1135 |
H1 | 106 | 106 | 210 | 210 | 215 | 215 | 245 | 305 | 365 | 415 | 510 | 560 | 658 | 735 | 610 | 665 |