Siemens Building Technology 331-2905 Actuator R-407A covering the majority of standard

covering the majority of standard damper sizes

Direct Acting Operation: Ensures seamless integration with direct-acting pneumatic actuators and valves

the yellow color-coding ensures rapid identification for technicians during regulator spring replacement or system commissioning

The Parker 77310 Coil

Siemens Building Technology 331-2905 Actuator R-407A covering the majority of standardThe Siemens Building Technology 331 2905 is a professional grade No. 4 Pneumatic Damper Actuator engineered for the gradual or positive control of outdoor air, return air, and exhaust dampers. As a veteran preferred HVAC pneumatic actuator, this unit features a rugged all metal body and a 4 inch stroke designed for longevity in demanding ventilating systems and terminal units like unit ventilators and mixing boxes. This model is equipped with an