Fan Coil Valve, Two Way, 1/2" NPT, 3.5 Cv, Normally Closed, 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 VU443 and VU843 Actuators