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China Shoulder Groove Butterfly Valve Manufacturer Deye Supplies Cast Iron Ggg40/Ggg50 Groove Ends Butterfly Valves, 150lbs (PN20) , Pn16, Pn10., Find Details and Price about Cast Iron Butterfly Valves and Butterfly Valves for PVC Pipes Connection from Shijiazhuang Deye Pipe Industry Co., Ltd.