Siemens 331-2972 Pneumatic Damper Actuator 4" 8-13Psi

Siemens 331‑2972 pneumatic damper actuator is an industrial air-operated actuator designed to control dampers in HVAC and ventilation systems, providing precise positioning using a pneumatic control signal within a defined pressure range. Manufacturer: Siemens Model: 331‑2972 Product Type: Pneumatic Damper Actuator Country of Manufacture: USA Actuator Size: 4 inch diameter Control Pressure Range: 8–13 PSI Actuation Type: Pneumatic diaphragm actuator Function: Modulating control of air dampers in HVAC systems Operating Medium: Compressed air Mounting Type: Bracket or direct damper mounting Housing Material: Metal cylindrical enclosure Color: Dark grey/black metal body Connection Type: Pneumatic air fitting for control signal input Stroke Type: Linear/rotary (depending on linkage configuration) Control Signal: Proportional pneumatic signal (8–13 PSI typical HVAC standard) Application: HVAC dampers, air handling units, ventilation control systems, industrial airflow regulation Markings: Siemens label, model 331‑2972, actuator size “4 inch”, pressure range 8–13 PSI, manufacturing information Operating Environment: Suitable for indoor industrial and commercial HVAC applications Protection: Enclosed actuator body for mechanical protection and durability

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