HDPE flap valve, flange connection 10º angle, Ø100 – Ø2000 mm. ATK-F

Flange mounted HDPE Flap Valve ATK-F.
Opening Ø100 mm – Ø2000 mm. 5 M.w.c. On seating.

This HDPE non-return valve is mostly installed partly or completely submerged (in surface water / sewage / in case of emergency / flood protection), regulating a water flow in a single direction and preventing any back flow. To be applied practically in all kinds of environments with free flow / gravitation.

The flap valve is hung at a 10 degree angle to ensure a water tight seal. This version is suitable for flange mounting. Standard PN10 drillings. Other drillings on request. 

Standard water pressure will be 1 M.w.c. from top of culvert on seating long duration (50 years).
5 M.w.c. from invert level on seating short duration (72 hours)

Freedrain flap valves with stainless steel hinge pins are equipped with HDPE ribs. Bigger dimensions shall be reinforced with stainless steel U-profiles. They can also be manufactured in a custom made size or shape (square /rectangular), or designed to suit other operating water pressures.

Materials used:
-HDPE
-SS316L
-EPDM sealing

Advantages of the Freedrain flap valve:
-Design life of 50 years
-First class materials used
-Maintenance free
-Fast opening moment, so no accumulation of dirt in the pipe
-Light weight and easy handling.
-Easy to adjust design for custom made requirements.
-High UV protection
-Easy replaceable Lip seal