What is the thread size for the air connection

resulting in improper airflow regulation and compromised static pressure

non-spring return damper actuator engineered for precise proportional modulation in commercial HVAC systems

Can I replace just the ECM control module

The A150 is the direct OEM replacement for the discontinued 9447 motor

Siemens Building Technology 331-2856 Actuator 322057-301 What is the thread sizeThe Siemens 331 2856 is a heavy duty Powers Controls No. 6 pneumatic actuator designed for reliable linear control of large dampers, centrifugal refrigeration inlet vanes, and multi section ventilation systems. This pneumatic damper actuator features a rugged, all metal body construction to withstand demanding mechanical environments. It operates on a nominal 8 13 psi spring range, providing the high torque performance required for outdoor air,