Cast iron manual wafer butterfly valve: 1)DN40-600 2)PN10/16 ... , AS 2129 4)F/F:ANSI B 16.10 Cast iron manual wafer type butterfly valve:SizeDN40-DN600End flangeANSI B 16 ... or regulate ApplyFresh water, sewage, sea water, air, vapor, food, medicine, oils. acids, alkalis, salt etc.