... valve technical standard. 1. Nominal Pressure: 1.6 MPa. Brass check valve:Material ( brass body): copperTechnical: Forged, 1.6MPa pressure.Surface: Galvanized, chrome and Nickel ... 150oCMedium: Water, Oil , Gas,etc.Size: 1/2", 3/4", 1", 1 1/2", 1 3/4", 2", 2 1/2", 3", 4"Satndard: GB. DIN, ANSI , EN, BS ...