CARBON STEEL CAST VALVES OIL SERIES Types Gate valves, globe valves,check valves Standards/Grades Gate valve: NFM 87-400 / API 600- BS 1414 Globe valve: BS 1873 Check valve: API 6 D - BS 1868 Grades: A216 WCB / A217 C5 / A351 CF8M (stainless steel) etc. Dimensions / Tolerances / Testing (according to Standard) Diameters DN 50 to 600 / NPS 2" to 24" Class 150, 300, 600, 900, 1500 ISO PN 20, 50, 100, 150, 250 Optional - Certification 3.1 B according to EN 10 204 Applications Transportation of hydrocarbons and gases for use with "oil" pipe