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China Manufactured Ductile Cast Iron Carbon Steel Body 4 Inch 8 Inch EPDM Seat Wafer Lug Flange U Type Butterfly Valve, Find Details and Price about Valve Butterfly Valve from China Manufactured Ductile Cast Iron Carbon Steel Body 4 Inch 8 Inch EPDM Seat Wafer Lug Flange U Type Butterfly Valve - Tianjin Ots Valve Manufacturing Co., Ltd.