Tideflex check valves are free draining
Tideflex Check Valves are Free Draining
Key Benefit: free draining = no upstream flooding
Tideflex check valves are manufactured from rubber and have a unique duckbill design. Tideflex valves' elastomer construction offer a unique combination of flexibility, durability and strength. This ensures their maintenance-free operation on outfalls along coasts, on beaches and on river banks. In situations where outfalls will encounter sand & silt, rocks and other debris, and are likely to to be at least partially buried some of the time, Tideflex duckbill valves are the most effective solution, especially in comparison to flap valves.
Duckbill design - variable opening
Rubber construction - flexible, durable & strong
Tideflex Technologies was the original inventor and manufacturer of duckbill style check valve
Self-clearing of debris so eliminate potential blockages
Do not warp, freeze or corrode so maintain long-term function
Low cracking pressure to eliminate standing water in the upstream system
Thirty years of proven field operation, research and development, and continued engineering enhancements
Free draining - no upstream flooding issues
No maintenance - saving operational time and money
25+ years service life - long-term capital cost savings
Reliable, proven track record - no unpleasant surprises
How they work
The rubber duckbill check valve is inherently a variable orifice device which changes its effective opening area with respect to the internal pressure and mass flowrate through the unit -
i.e line pressure opens the valve to allow water to flow out and back pressure closes the valve, with no external energy required. Due to the design of its rubber matrix, the Tideflex check valve has an extremely low cracking pressure, so the valve is self-draining which eliminates standing water and maximizes storage volume (attenuation) in the upstream drainage system. The vulcanised rubber body allows the valve to return to a closed position every time, sealing around any debris that may have become lodged in the valve. This debris will then be washed away as the valve opens again to allow more water to flow out, even at very low flows.
Read case study here.