Duckbill valve - new environmentally friendly flexible check valve

xh-type flexible valve aka "Duck Valve", is a special structure, appearance was "beak-like", with the "positive displacement flow, reverse-return" feature of the new drainage valves. The valve does not have any active components, free of any maintenance. Can give straight pipe, flange pipe, concrete pipe, glass pipe support, widely used in coastal, beach, pier, reservoirs, municipal drainage, cesspools discharge, odor barrier, pumping systems and other effluent outfall.

     xh-type Duckbill check valves can effectively prevent backflow and intrusion precipitate, and the outlet of the conventional fixed tube is different: duckbill valve and outlet flow jet velocity was complex nonlinear relationship tests showed duckbill sewage discharge valve flow rate necessary to achieve effective mixing, the mixture of the same circular pipe than the desired flow rate much smaller, the flow characteristics of different valve port various tests, while the test data analysis, the a general two-dimensional internal dynamics calculation formula results of these tests show that the use duckbill valve, enabling diffusion is more stable, while a large jet velocity, energy is also large, with a laser velocimetry technique duckbill valve jet Koupen near the mixing zone, the results show duckbill discharge port than the standard circular nozzle has a better diffusion.

     xh-type flexible check valve has a buffer, silencer performance, maintenance-free and non-corrosive, etc.. It is in sealing performance, poor working environment and enhance performance water purification performance far superior to shoot the door, knocked on the door to solve the traditional butterfly valve or mechanical failure due to a lot of poor operating conditions, a large leak, seat wear, deformation of parts and corrosion, noise, need regular maintenance and replacement of technical problems. Be described as green valve.

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