Siemens 257-02070B MT SERIES 3W VALVE ASSEMBLY, ANSI 250, LINEAR, 3/4", FXF, 6.3CV, 3-8PSI SR, PNUSiemens 257 02070B MT Series 3W Valve Assembly, ANSI 250, Linear, 3 4", FxF, 6. 3Cv, 3 8psi SR, PnuThis Valve Assembly is a Powermite 599 MT Series, ANSI Class 250, 3 W, Mix, Linear, 6. 3 Cv, FxF, 3 4", , 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, 6. 3 Cv, FxF, 3 4", , Brass Body,