Fan Coil Valve, Three Way, 1/2" NPT, 4 Cv, Mixing, 20 Psi Maximum Close Off, Quick Opening, Chilled Water or Hot Water with up to 60% Glycol, Brass Body, Brass Stem, Brass Seat, Buna-N Rubber Plug/Ball/Disc, EPDM Rubber Packing, Used with VU444 and VU844 Actuators