Siemens 371-03147 VALVE ASSY 3W MIX 1/2" 4CV EQ PCT/LIN SS TRIM FXF, PROP ELECT ACT NSRSiemens 371 03147 Valve assy 3W Mix 1 2" 4Cv Eq Pct Lin SS Trim FxF, Prop Elect Act NSR Flowrite 599 Series Valve Assembly features a proportional control (0 to 10 Vdc or 4 to 20 mA), non spring return, 24 Vac electronic actuator. The 3 way, mixing, 1 2 inch, 4 Cv valve assembly is ANSI Class 250 and has an equal percentage linear characteristic, stainless steel trim, and female x female end connections. Additional Information Valve TypeThree way