Duckbill valve duckbill valve action _ _ Serco supply material (certified merchants) are provided by Serco Gongyi City Water Supply Materials Limited. Serco Gongyi City Water Supply Materials Co., Ltd. (www.gyxjbcq.com/) is a professional "PTFE lined rubber joints, standard waterproof casing, duckbill valve, power connector, stainless steel rubber joints" of the company. Since its inception, we adhere to the "honesty, sound management" approach, the courage to healthy competition in the market, so that "Serco supply material" brand has a good reputation. We adhere to the "service first, customers first" principle, so that the water supply materials Serco has won the trust of customers at the gate of the congregation, and establish a good corporate image. Special Note: This information is for reference pictures and information, please contact us to obtain the most accurate information, thank you! Rubber duckbill valve to prevent flooding and water intrusion inflows street sewers and basements duckbill valve price, to avoid major losses duckbill valve characteristics, duckbill valve to prevent the water level rises, flood flow backward inflow of sewage treatment plants, drainage pump station; blocked sewage odor or smell of the fluid diffusion, and can be drained at any time; in the rainy season, to prevent the city from the river flood irrigation to the street sewer; quality is superior to shoot the door duckbill valve action, such as closing the door to overcome the shot lax and some other defect . Serco supply specialized in producing flexible rubber joints, attentive service to provide you with quality and cheap products are voyage tireless pursuit. Large sewage treatment plant flexible rubber joints installed Role: flexible rubber joints by the inner and outer layers of plastic, ply and bead composed of tubular rubber parts, molding and then vulcanized with metal flange or a combination of parallel connector loose cover . This product can reduce vibration and noise, and thermal expansion and contraction due to temperature changes from the compensation due to widely used in various piping systems.