The flap valves are non-return elements that allow the flow of water in one direction, preventing it in the opposite direction.
This range of flap valves is designed for end-of-line mounting. It can be installed supported on a wall by means of anchors or bolted to a flange. Its design can be circular, square or rectangular. To make the closure, an elastomer gasket is used, achieving tightness.
They function as a shutter and close the passage, by gravity, when the fluid circulates in an undesired direction. When operating by gravity, they must be placed in a certain position.