Duckbill valve was called duckbill check valve, rubber check valve or rubbe non-return valve in common.
We are engaged in continuously consummate and improve the function of the duckbill valve, therefore the strength, toughness and the leakproofness have been greatly enhanced. This valve has no movable element so that it needs no repair. Duckbill valve goes for straight pipe, flange pipe, cement pipe and glass reinforced plastic pipe, it has been widely used in drainage and flood discharge of seacoast, sandy beach, wharf and reservoir. Duckbill valve has solved the blocking problem completely. Indeed, it is a environment-friendly valve.
The manufacturing technique of this valve was introduced from Spain. It was called duckbill valve in common, was the latest check valve which was extensively used in domstic sewage treatment with its unique principle of work and fsahionable design.

Application:
Mainly used at waterproofing system, drainage system, water pump outlet, lift pumping station and submerged aeration system.

Advantages:
Extremely easy installation for its conjoined flange and valve body.
Minimal maintenance
Full rubber structure
Available for large objects to pass through without blockage

Materials:
Neoprene, chlorosulfonated polyethlene, Buna-Nrubber(NBR), ethylene propylene rubber(EPR) etc. (other materials on request)

Installation method and dimension:
This valve is available for immediatepacking on to the tank, flange or reclamationdam for its conjoined rubber flange and valve body. And the metal flange gasket could help the valve join the metal flange naturally. During installation, the flange should be chose on correct dimension to match with the connecting flange. Waterproof-glue should be added between flange and connecting flange on a case-by-case basis to ensure the pipeline absolute sealed. And do not damage the flange.