Rubber Duckbill Check Valves and Inline Rubber Check Valves are an exceptionally reliable and cost effective method to control back pressures in sewage treatment plants. Other common applications are stormwater outfall, effluent discharge, flood control, wet wells. These valves are fully passive flow devices, which require absolutely no maintenance whatsoever, no source of power or manual operating assistance, and are an excellent alternative to conventional flap gate valves and other check valves.
The flexible Rubber Duckbill Valve is normally closed but will open with very minimal head pressure, always providing maximum flow with minimal pressure drop across the valve. Conventional Flap-Gate Check valves, and other check valves are mechanical and have metal components that are commonly know to malfunction, rust, and seize. Rubber Duckbill Check Valves will even handle large obstructions without jamming or binding, and guarantee trouble free back flow prevention, and can even seal around trapped or suspended solids with minimum back pressure. The finest of engineering elastomers are used, and the outer layers, are designed to repel marine organisms.