Siemens 257-02000B 2-Way 1/2" Terminal Unit Valve, Cv 0.4, Normally Closed, FxF [New]

Siemens 257-02000B 2-Way 1/2" Terminal Unit Valve, Cv 0.4, Normally Closed, Brass Trim, F x F Connection, Spring Return Pneumatic Valve Actuator, 3-8 psi (21-55 kPa). Siemens. Siemens. 257-02000B.