... 2Cr13,carbon steel SS410 Seat: EPDM Disk: SS304,Grey Iron Cast Iron butterfly valveNominal pressure: PN10/16 Body material: Cast IronStem: ... 2Cr13, stainless steel, carbon steel,SS410Disck: SS304, grey iron.Seat: EPDM/NBR/PTFESuitable medium: Water ,steam oil ...Temperature:-40 ... made by GOST RUSSIAN standard.this is the cast iron flange gate valve GOST RUSSIAN standard.15kch18p globe valve ...