Caleffi introduces its panel radiator valves for use with one- or two-pipe panel radiator systems that have a built-in thermostatic valve unit. Available for use with straight or angled pipes. Pictured is the two-pipe angled version, which fits 1/2” female radiator connections. Max working pressure is 150 psi (10 bar) and max working temperature is 212° F (100° C). It is connected to the bottom supply and return ports, providing fluid flow to the upper thermostatic valve built into the radiator. Caleffi.