Fish Friendly Flapvalves
Fish & Eel friendly flapvalves are available in three different designs:-
Pet Flap/Tidal Flapvalves
Pet/Tidal flapvalves can be easily retro-fitted to existing structures or incorporated into new ones. The design is based on our standard HDPE flapvalve. These fish friendly flap valves are bottom opening and are set at a slight angle to maintain a good seal. The flap slowly closes as the tide rises and pulls the flap shut using the float. The system allows for a greater period of time where the flap is open and submerged, thus giving fish and eels more time to pass through the structure.
Reset float system
This system is designed to work on tidal applications only as it is both activated and reset by the tide cycle. The unique feature of the system is that it can be adjusted on site without the need for removal giving the user infinite control over the time the flap valve stays open.
Side Hung/Opening Doors
Due to the fact that HDPE floats in water the idea behind the design
is keeping the flap gates open as long as possible, while there is no
difference between the water levels on both sides of the structure. This means the doors offer no restriction when open. The doors are mounted on an angle so with no water present they will naturally
hang open.If the water rises on the outside of the doors, they will
close stopping water from passing through.
Fish Friendly Flapvalve |