Siemens Building Technology 331-2929 Actuator 322057-301 making it compatible with a

making it compatible with a wide range of single-phase residential and commercial systems

standardized connection to the wiring system

it draws operational energy directly from the monitored line

The unit is strictly rated for hot and chilled water applications with up to 50% glycol

Siemens Building Technology 331-2929 Actuator 322057-301 making it compatible with aThe Siemens 331 2929 Actuator is a heavy duty No. 4 pneumatic damper actuator designed for professional HVACR installations requiring high torque performance. Featuring a 3 7 psi spring range and a standard 4 inch stroke, this unit is engineered for the gradual or positive actuation of large dampers, mixing boxes, and terminal unit air valves. Built with a rugged, all metal body and a replaceable EPDM rolling diaphragm, this pneumatic damper actuator