Siemens 599-03007 FLOWRITE 1 1/2" 2-WAY VALVE, NO, 16 CV, LINEAR, SS TRIM, FXF, ANSI 250.Siemens 599 03007 Flowrite 1 1 2" 2 Way Valve, NO, 16 Cv, Linear, SS Trim, FxF, ANSI 250. Flowrite, 1 1 2" 2 Way Valve, 16 Cv, Linear, NO, FF, SS Trim, ANSI Class 250, Designed to work with pneumatic or electronic actuators, Direct coupled universal bonnet, No tools required for installation. Flowrite, 1 1 2" 2 Way Valve, 25 Cv, Linear, NO, FF, SS Trim, ANSI Class 250, Designed to work with pneumatic or electronic actuators, Direct coupled universal