RA 2000 Thermostatic Radiator Valves regulate the flow of hot water or low pressure steam through free-standing radiators, baseboards or convectors in hot water and two-pipe steam systems. Operators and valves are packaged separately to allow an installer to select a suitable combination for each application. Danfoss Thermostatic Radiator Valve, Side Mount Angle, Series: RA 2000, 3/4 in Nominal, MNPT x FNPT End Style, 145 psi (Static)/232 psi (Test) Pressure, 250 deg F, Brass Body, EPDM Disc, Seat Washer O-Ring Softgoods, Nickel Plated