Duckbill valve is generally installed in large cities on the surface of the sewage pipeline system software at the intersection of branch routes, can be based on its own ductility self-sealing basic principle, can reasonably prevent the tide water line is high, flood backflow into the surface of large cities, sewage treatment stations and other areas, reasonable to ensure the reliable operation of such critical areas. Duckbill valve can not only ensure a reasonable check for the liquid, for the smell of liquid as well as can establish a better smell sealing effectiveness, further improve the actual effect of check, reasonably ensure a better urban natural environment.
