Model: DF947 Drive: power drive pipeline butterfly valve Materials: Valve Body: Gray cast Iron, Ductile Iron, Valve Disc: Gray cast Iron, Ductile Iron Valve Stem: superb carbon steel Diameter: 700-1600mm If you do not feel satisfactory with our configuration, please let us know your standard and other ralated imformation, we supply machining services Welcome to order in our company and your inquiry shall be replied within two days at most.