Open and close more effort. When the shutter opening and closing movement direction perpendicular to the flow direction of the medium. Compared with the closing valves, valve open and close more effort. Medium flow direction is generally unrestricted. Medium can flow through the valve in any direction on both sides, can connect or disconnect the purpose of. Easy to install, Puyang duckbill valve, pipe flow direction is likely to change in the medium. Major urban drainage facilities overhaul duckbill valve priority rainy season to the major cities of the drainage system has brought severe challenges, the need for further transformation of urban drainage facilities, but often can not keep up the progress of reconstruction needs, the new duckbill valve drainage products is essential, coupled with a substantial increase in recent years, urban water displacement, duckbill valve unit price, drainage channels has not changed much, with summer rainfall, it is easy to form waterlogging phenomenon, in recent years our country developed cities often flooded phenomenon, how much a duckbill valve, city drains transformation is imminent, the first out of the water pipeline pumping station improvements and planning, focusing on water points redesigned, additional sewage treatment plants out of the water pipeline pipeline project and duckbill valve drainage improvement systems. Duckbill valve model, Serco supply material (certified), Puyang duckbill valve provided by Serco Gongyi City Water Supply Materials Co., Ltd. Gongyi City Water Supply Materials Co. Serco (www.gyxjbcq.com/) is Zhengzhou, gate leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Serco supply material in leadership with the staff warmly welcome all inquiries negotiations to create Serco supply material better future.