Siemens Building Technology 331-2929 Actuator 322057-301 The unit is strictly rated

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

for proper operation and to ensure water does not collect in the seat area

it draws operational energy directly from the monitored line

Rated for an impressive 2

Siemens Building Technology 331-2929 Actuator 322057-301 The unit is strictly ratedThe 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