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DIN/ANSI/API/ASTM Cast Steel, Stainless Steel 304, 316 Double Flange End Concentric Butterfly Valve for Lever/Wormgear/Electric/Penumatic/Pneumatic/Motorized, Find Details and Price about Butterfly Valve and Double Flange End Concentric Butterfly Valve from Zhejiang J-Valves Fluid Equipment Co., Ltd.