Brass check valve technical standard: 1. brass check valve Nominal Pressure: 1.6MPa Brass check valve:Valve body: copperTechnical: Forged, 1.6MPa pressureValve surface: Galvanized, chrome and Nickel plated,etc.Temperature: Normal or -20oC to 150oCMedium: Water, Oil , Gas,etc.Size: 1/2", 3/4", 1", 1 1/2", 1 3/4", 2", 2 1/2", 3", 4"Guarantee: 3 yearsSatndard: GB. DIN, ANSI , EN, BS, UIN ,JIS.