Serco Gongyi City Water Supply Material Factory specializes in producing various types of duckbill valves double Falan Song sets of power transmission connectors, all varieties loose sets of power transmission connectors, low prices, cheap welcome new and old customers to buy. What is a good quality duckbill valve duckbill valve. Duckbill valve, also known as rubber discharge check valve, which is a block backflow valve products wholesale power transmission connectors, because of its easy installation, maintenance-free by the majority of consumer recognition, becoming an indispensable product backflow. Serco duckbill valve placement principles: 1, V-type rubber check valve should be kept in a cool, dry place; 2, set the floor or above ground level down; 3, the valve should be kept away from heat, ozone, oil, acid alkali area; 4, non-sharp intense radiation exposure and light load; 5, non-sharp utensils scratched the surface; 6, the box marked "↑", allowed to rewind or flat. Double flange Transmission Joint, dowel joints, Serco supply materials provided by Serco Gongyi City Water Supply Materials Co., Ltd. Serco Gongyi City Water Supply Materials Co., Ltd. (www.gyxjbcq.com/) strong, credible, in Zhengzhou, Henan gate valve industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Serco supply material and you work into the brilliant, for a better future!