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Fds OEM DN40-400 Controlled Butterfly Valve EPDM PTFE Ductile Iron Wcb Stainless Steel Pneumatic Flange Butterfly Valve, Find Details and Price about Pneumatic Flange Butterfly Valve Flange Butterfly Valve from Fds OEM DN40-400 Controlled Butterfly Valve EPDM PTFE Ductile Iron Wcb Stainless Steel Pneumatic Flange Butterfly Valve - Fudesheng (Jiangsu) Automatic Control Valve Manufacturing Co., Ltd