Siemens 373-03128 VALVE ASSY 2W NC 1/2", 2.5CV, EQ PCT SS TRIM FXF, FLOAT ELECTRONIC ACT NSRSiemens 373 03128 Valve assy 2W NC 1 2", 2. 5Cv, Eq Pct SS Trim FxF, float Electronic Act NSR Flowrite 599 Series Valve Assembly features a floating control, non spring return, 24 Vac electronic actuator with 30 second run time. The 2 way, normally closed, 1 2 inch, 2. 5 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 TypeTwo way