Overview
The Belimo FSNF24 US is a 24 V spring-return fire and smoke damper actuator engineered for high-temperature compliance and quick emergency repositioning.
Features
- Rapid response time under 15 seconds for power loss or safety trip
- Meets UL555 and UL555S test requirements up to 350°F
- Durable steel mechanical assembly for high-temperature endurance
- Direct-coupled installation requiring no linkages
Specifications
- Torque: 70 in-lb [8 Nm]
- Nominal Voltage: AC 24 V
- Control Signal: On/Off (Open/Close)
- Running Time: <15 seconds
- Maximum Damper Area: Up to 12 sq. ft.
Applications
- Fire and smoke safety dampers in commercial air distribution ductwork
- Emergency smoke ventilation and containment systems



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