Siemens 274-03129 VALVE ASSY 2W NC 1/2", 4CV, EQ PCT SS TRIM FXF, PROP EL-HYDRAUL ACT SRSiemens 274 03129 Valve assy 2W NC 1 2", 4Cv, Eq Pct SS Trim FxF, Prop El Hydraul Act SR Flowrite 599 Series Valve Assembly features a proportional control (0 to 10 Vdc or 4 to 20 mA), spring return, 24 Vac electro hydraulic actuator. The 2 way, normally closed, 1 2 inch, 4 Cv valve assembly is ANSI Class 250 and has an equal percentage characteristic, stainless steel trim, and female x female end connections. Additional Information Valve Body