Siemens 285-05940 VALVE ASSY 2W NO, 2-1/2" 63CV EQ PCT BRONZE TRIM FLANGED 12" PNEU ACT W/ POSSiemens 285 05940 Valve assy 2W NO, 2 1 2" 63Cv Eq Pct Bronze Trim Flanged 12" Pneu Act w posFlowrite 599 Series Valve Assembly features a 12 inch pneumatic actuator with factory mounted positioner, 3 4 inch stroke, and 5 psi span. The 2 way, normally open, 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 Assembly