Siemens 257-02042 MT SERIES 2W VALVE ASSY, ANSI 250, NO, MOD EQ PCT, 1/2", FXUM, 4 CV, 3-8PSI SRSiemens 257 02042 MT Series 2W Valve Assy, ANSI 250, NO, Mod Eq Pct, 1 2", FxUM, 4 Cv, 3 8psi SRThis Valve Assembly is a Powermite 599 MT Series, ANSI Class 250, 2 W, NO, Modified Eq Pct, 4 Cv, FxUM, 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, 2 W, NO, Modified Eq Pct, 4 Cv, FxUM, 1 2", Brass