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API Ci Di Class 150 EPDM PTFE NBR PFA Soft Seat Metal Stainless Steel Disc Grey Iron Ductile Iron Cast Carbon Steel Lug Flanged Flange Wafer Butterfly Valve, Find Details and Price about Ductile Iron Butterfly Valve Cast Butterfly Valve from API Ci Di Class 150 EPDM PTFE NBR PFA Soft Seat Metal Stainless Steel Disc Grey Iron Ductile Iron Cast Carbon Steel Lug Flanged Flange Wafer Butterfly Valve - CZIT DEVELOPMENT CO., LTD.