Siemens 257-02069B MT SERIES 3W VALVE ASSEMBLY, ANSI 250, LINEAR, 1/2", FXF, 4 CV, 3-8PSI SR, PNUSiemens 257 02069B MT Series 3W Valve Assembly, ANSI 250, Linear, 1 2", FxF, 4 Cv, 3 8psi SR, PnuThis Valve Assembly is a Powermite 599 MT Series, ANSI Class 250, 3 W, Mix, Linear, 4 Cv, FxF, 1 2", Bronze Body, Includes MT Series 2 In Pneumatic Actuator with 3 8 psi SR, Used for control of hot or chilled water for convectors This Valve Assembly is a Powermite 599 MT Series, ANSI Class 250, 3 W, Mix, Linear, 4 Cv, FxF, 1 2", Brass Body, Includes MT