... DI 3.Disc: DI SS Aluminum bronze Wafer Type Buttefly Valve 1.Size: DN40 to DN3002.Body: CI DI3.Disc: DI ... SS Aluminum bronze4.Stem: SS (One Piece with Pin)5.Seat: NBR EPDM VITON PTFE6.Working Pressure: PN10 PN167.Surface: Electric ... , air, vapor, food, medicine, acids, alkalis, salts, paper making etc. soft sealing waffer butterfly valve