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Pn16 Flanged Worm Gear Butterfly Valve Ductile Iron EPDM Rubber Soft Seal Butterfly Valve for Water Distribution System, Find Details and Price about Ductile Iron Butterfly Valve Flanged Butterfly Valve from Pn16 Flanged Worm Gear Butterfly Valve Ductile Iron EPDM Rubber Soft Seal Butterfly Valve for Water Distribution System - TIANYI SUNS PIPE & FITTINGS CO., LTD.