Siemens 274-05950 VALVE ASSY 2W NC 2-1/2", 63CV, EQ PCT BRONZE TRIM FLANGED PROP EL-HYDRL ACT SRSiemens 274 05950 Valve assy 2W NC 2 1 2", 63Cv, Eq Pct Bronze Trim Flanged Prop El Hydrl Act SRFlowrite 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, 2 1 2 inch, 63 Cv valve assembly with 3 4 inch stroke is ANSI Class 250 and has an equal percentage characteristic, bronze trim, and flanged end connections. Flowrite 599 Series Valve