Siemens 274-05981 VALVE ASSY 2W NO, 3" 100CV EQ PCT BRONZE TRIM FLANGED PROP EL-HYDRAUL ACT SRSiemens 274 05981 Valve assy 2W NO, 3" 100Cv Eq Pct Bronze Trim Flanged Prop El Hydraul 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 open, 3 inch, 100 Cv valve assembly with 3 4 inch stroke is ANSI Class 125 and has an equal percentage characteristic, bronze trim, and flanged end connections. Flowrite 599 Series Valve Assembly