Overview |
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Flap valve is a simple check valve always installed in the pipe end to stop back flow effectively. It is mostly connected with pipes or mounted to the wall with flange. Flap valves are designed over hydraulics and gravity, after installation, it is no need of manual operation and almost maintenance free.
Flap Valve Welded Steel Type 4011 is made with welded steel,the efficient and tough design will be suitable for sewage, river and marine environment.
Features and Benefit |
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Needs no operation
Maintenance free
Heavy design for tough application
Customizing available
OEM service available
Supply Range |
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Size: 400mm to 1200mm
Temperature: -40℃ to 120℃
Fluid: Water, Swage, Acid, Alkali, Oil, etc.
Flange drilling: PN6/PN16/PN25/PN40/CLASS300/CLASS600
Parts & Options |
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| Item | Part | Available Material | Quantity |
| 1 | Seat | Carbon Steel/Stainless Steel | 1 |
| 2 | Gate | Carbon Steel/Stainless Steel | 1 |
| 3 | Hinge | Stainless Steel | 1 |
| 4 | Gasket | EPDM | 1 |
Data Sheet |
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| DN | Drilling | D1 | D2 | D3 | L | H | N | d |
| 250 | PN16 | 405 | 355 | 320 | 185 | 190 | 12 | 26 |
| 300 | PN16 | 460 | 410 | 375 | 210 | 215 | 12 | 26 |
| 350 | PN16 | 520 | 470 | 436 | 340 | 340 | 16 | 26 |
| 400 | PN16 | 580 | 525 | 485 | 265 | 260 | 16 | 30 |
| 450 | PN16 | 640 | 585 | 515 | 305 | 315 | 20 | 30 |
| 500 | PN16 | 715 | 650 | 608 | 325 | 330 | 20 | 34 |
| 600 | PN10 | 780 | 725 | 685 | 300 | 395 | 20 | 30 |
| 700 | PN10 | 895 | 840 | 800 | 320 | 450 | 24 | 30 |
| 800 | PN10 | 1015 | 950 | 905 | 350 | 520 | 24 | 34 |
| 900 | PN10 | 1115 | 1050 | 1005 | 350 | 550 | 28 | 34 |
| 1000 | PN10 | 1230 | 1160 | 1115 | 420 | 650 | 28 | 36 |
| 1200 | PN10 | 1455 | 1380 | 1325 | 420 | 770 | 32 | 39 |
PS: |
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Patterns in above table are in PN10/PN16, please contact UNICK if other patterns if needed.
Datas "L" and "H" may different from the data sheet, please contact UNICK if necessary.
Sizes bigger than 1200mm are double door designed, please refer flap valve 4013 for more information.
