For use at the outlet of a drainage system as a backflow preventer and in flood protection. When the water level rises, backflow is prevented by automatic closing of the cover. The relief flap consists of the frame and the flap. The frame is aligned and doweled to the structure opening.
Individual sizes are available on request.
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Replaceable wear parts and seal (EPDM or NBR)
Rotary lock including factory certificate according to DIN EN 10204, 2.1, with indication of the leakage rate according to DIN 19569, part 4
All welded stainless steel parts from our own pickling plant
Center-mounted flap for three-way sealing applications in channels and flumes.
Soft-sealing flap cover as a backflow preventer - for drainage and flood protection