Siemens Building Technology 257-02068B Valve Assembly 320819-301 Vibration Resistance: Secure locking connectors

Vibration Resistance: Secure locking connectors prevent terminal backing

This bronze safety relief valve features a 3/4" Male NPT inlet and a 3/4" Female NPT outlet

Automatic Zero Calibration: Pushbutton and remote zero-adjust terminals prevent sensor drift and minimize maintenance callbacks

you must physically depress the reset button after resolving the underlying heat dissipation issue

and horsepower

Siemens Building Technology 257-02068B Valve Assembly 320819-301 Vibration Resistance: Secure locking connectorsThe Siemens 257 02068B is a high performance 3 way mixing valve assembly designed for terminal unit applications, featuring a 1 2 inch NPT connection and a 2. 5 Cv linear flow characteristic. This assembly integrates a Siemens 599 Powermite MT Series forged brass body with a rugged 2 inch pneumatic valve actuator, optimized for precise control of hot or chilled water in fan coil units and reheat coils. The spring return pneumatic actuator operates