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DN400 Pn16 EPDM NBR Soft Seat Flange Butterfly Valve, Find Details and Price about DN400 Pn16 Butterfly Valve DN400 Pn16 EPDM Butterfly Valve from DN400 Pn16 EPDM NBR Soft Seat Flange Butterfly Valve - Guangxi Dexiang Electromechanical Equipment Co., Ltd