Overview
The Belimo FSTF24 US is a compact, 24V spring return fire and smoke damper actuator. It provides basic two-position control to drive small life-safety dampers to their safety position upon power interruption.
Features
- Spring return fail-safe action upon power loss or thermal limit trip
- Compact, space-saving design for small damper shafts
- Simple two-position On/Off control logic
- Reversible direction of rotation via CW/CCW mounting
- Meets UL555 and UL555S safety requirements
Specifications
- Actuator Type: Spring return
- Torque: 18 in-lb [2 Nm]
- Voltage: AC/DC 24 V
- Control Type: On/Off
- Angle of Rotation: 95°
- Degree of Protection: IP42, NEMA 2, UL Enclosure Type 2
Applications
- Small fire and smoke dampers in commercial 24V HVAC systems
- Life-safety emergency airflow isolation



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