HDPE Liftable flap valve type POTK
non-return flap valve suitable for permanent under water use mounted on a penstock frame so that the flap valve can be lifted.
When the door of the penstock is lowered the product functions as a non-return flap valve in lifted position the opening is free and flow can go in both directions.
1 Mwc measured permanent from top of opening,
5 Mwc short duration (72 hours) from bottom of opening.
Higher pressures on request.