Siemens 599-05950 FLOWRITE 2-1/2" FLANGED, 2W VALVE, NC, 63 CV, EQ PERCENT, BRONZE TRIM, ANSI 250Siemens 599 05950 Flowrite 2 1 2" Flanged, 2W Valve, NC, 63 Cv, Eq Percent, Bronze Trim, ANSI 250Flowrite, 2 1 2" 2 Way Valve, Flanged, Iron Body, 63 Cv, Equal Percentage NC, Bronze Trim, ANSI Class 250; Designed to work with pneumatic or electronic actuators. For normal duty applications. Flowrite, 2 1 2" 2 Way Valve, Flanged, Iron Body, 63 Cv, Equal Percentage NC, Brass Trim, ANSI Class 250; Designed to work with pneumatic or electronic actuators.