RA 2000 Danfoss Thermostatic radiator valves regulate the flow of hot water of hot water or steam through free-standing radiators, baseboards or convectors in hot water and two-pipe low pressure steam systems. This valve is designed for one pipe steam systems. 1/8" connection Max working pressure = 10 psi Max differential pressure = .6 bar Test pressure = 16 bar Max Water Temperature = 250 degree