ANSI Standard One-Way Anti-Backflow SS304 Flanged EPDM Rubber Duckbill Check Valve How the duckbill valve works The working principle of the duckbill ...
XH-41 EPDM blowdown check valve for industrial wastewater discharge How the duckbill valve works The duckbill valve is made of elastic neoprene and .....
XH-81 Pn16 Large-diameter clamp type anti-backflow nitrile duckbill check valve The field in which the product is applicable · Water conservancy ......