Siemens 371-03130 VALVE ASSY 2W NC 3/4", 6.3CV, EQ PCT SS TRIM FXF, PROP ELECTRONIC ACT NSRSiemens 371 03130 Valve assy 2W NC 3 4", 6. 3Cv, Eq Pct SS Trim FxF, Prop Electronic 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 2 way, normally closed, 3 4 inch, 6. 3 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