Features and Benefits Orifice calculated and processed according to international standard BS7350 Standard device dispense with extra proofread Applicable Standards Design standard: BS EN1042, Face to face standard: BS EN1092 Technical Data Nominal Diameter:DN65~DN600 (21 2"~24") Nominal Pressure: PN16 Temperature Range: -5C~85C Suitable for: Water, ethylene glycol, non correction medium, etc.