Siemens 599-03108 FLOWRITE 1/2" 2-WAY VALVE, NO, 1 CV, EQUAL PERCENTAGE, SS TRIM, FXF, ANSI 250.Siemens 599 03108 Flowrite 1 2" 2 Way Valve, NO, 1 Cv, Equal Percentage, SS Trim, FxF, ANSI 250. Flowrite, 1 2" 2 Way, 1. 0 Cv, Equal Percentage, NO, FF, Bronze Body, SS Trim, ANSI Class 250, Designed to work with pneumatic or electronic actuators, Direct coupled universal bonnet, No tools required for installation. Flowrite, 1 2" 2 Way, 1. 0 Cv, Equal Percentage, NO, FF, Brass Body, SS Trim, ANSI Class 250, Designed to work with pneumatic or