Overview
The Belimo AFB24-SR is a high-torque spring return damper actuator designed for modulating fail-safe control of air dampers in commercial HVAC systems.
Features
- Proportional modulating control accepting standard 2 to 10 VDC signals
- Spring return fail-safe operation returns damper to default position upon power loss
- High torque rating for driving larger damper assemblies
- Brushless DC motor with automatic overload protection
Specifications
- Torque: 180 in-lb [20 Nm]
- Nominal Voltage: AC/DC 24 V
- Control Signal: 2 to 10 VDC modulating
- Actuator Type: Spring Return
- Power Consumption: 5 W running, 3 W holding
Applications
- Modulating air volume control and safety shut-off in HVAC ductwork
- Precise airflow regulation in commercial ventilation systems



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