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Engineered with a 20
rigorously factory-tested to maintain strict airflow specifications
Installing this on a 115V circuit will result in motor failure or insufficient draft
it is recommended to install the valve with the solenoid vertical and upright to prevent debris accumulation in the core tube area
Siemens Building Technology 331-2929 Actuator 326058-757 Engineered with a 20The 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