Siemens 254-01100 MZ SERIES VALVE ASSEMBLY, ANSI 250, 2W, NC, LINEAR, 1/2", FXF, 0.4 CV, EL/MECHSiemens 254 01100 MZ Series Valve Assembly, ANSI 250, 2W, NC, Linear, 1 2", FxF, 0. 4 Cv, El MechThis Valve Assembly is a Powermite 599 MZ Series, ANSI Class 250, 2 W, NC, Linear, 0. 4 Cv, FxF, 1 2", 200 N, Bronze Body, Includes SSB MZ Series Elect Mech Actuator. Used for control of hot or chilled water for convectors, fan coil units, reheat coils. This Valve Assembly is a Powermite 599 MZ Series, ANSI Class 250, 2 W, NC, Linear, 0. 4 Cv, FxF, 1 2",