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DN50-DN2000 Ductile Iron Body and Disc EPDM Seal Pn10/16 Flange Type Butterfly Valve, Find Details and Price about Butterfly Valve Flange Butterfly Valve from DN50-DN2000 Ductile Iron Body and Disc EPDM Seal Pn10/16 Flange Type Butterfly Valve - Tianjin Tanggu General Valve Group Co., Ltd.