Duckbill valve is a fluid control valve named after its valve body shape resembling a duckbill. The duckbill valve mainly consists of a valve body, a valve cover, a valve disc, and bolts. Its main characteristics are simple structure, fast opening and closing, good sealing, and suitable for high flow and low pressure situations. It is commonly used in industries such as tap water, sewage treatment, air conditioning, heating, and chemical engineering.
The duckbill valve can effectively prevent backflow, backflow, and sediment generation. Unlike previous fixed circular pipe outlets, the jet velocity of the duckbill valve has a complex nonlinear relationship with the outlet flow rate. Experiments have shown that the flow rate required for effective mixing of the sewage discharged by the duckbill valve is much smaller than that required for the same mixing in circular pipes. Various tests have been conducted on the flow characteristics of different valve ports, At the same time, these experimental data were analyzed to obtain a universal two-dimensional internal dynamics calculation formula. These experimental results showed that using a duckbill shaped valve can make diffusion more stable, while the jet velocity is high and the energy is also high. Laser velocimetry technology was used to study the mixing area near the duckbill valve nozzle jet, and the results showed that the duckbill shaped discharge port has better diffusion effect than the standard circular nozzle.
Duckbill valves have advantages such as buffering, noise reduction, maintenance free, and corrosion free. It outperforms flap valves in terms of sealing performance, working performance in harsh environments, and improving seawater purification performance. It solves the technical problems of traditional flap valves or butterfly check valves that require frequent maintenance and replacement due to many mechanical failures, such as poor operating conditions, large leakage, valve seat wear, deformation and corrosion of parts, high noise, and frequent maintenance and replacement.
