Description
The Belimo BF24-TN is a spring-return fire damper actuator designed for reliable fail-safe operation on life-safety HVAC systems. The BF24-TN provides controlled motor positioning and rapid spring-driven closure to ensure secure damper positioning during power loss or emergency conditions.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Belimo |
| Category |
HVAC Actuators |
| Part Number |
BF24-TN |
| Subcategory |
Fire Damper Actuators |
| Nominal Voltage |
AC/DC 24 V |
| Nominal Frequency |
50/60 Hz |
| Voltage Range |
AC 19.2…28.8 V / DC 21.6…28.8 V |
| Power Consumption (Operation) |
7 W |
| Power Consumption (Rest) |
2 W |
| Power Consumption (Wire Sizing) |
10 VA |
| Inrush Current |
8.3 A @ 5 ms |
| Motor Torque |
18 Nm |
| Fail-Safe Torque |
12 Nm |
| Angle of Rotation |
Max. 95° |
| Running Time (Motor) |
<120 s / 90° |
| Running Time (Fail-Safe) |
16 s @ 20°C |
| Auxiliary Switches |
2x SPDT, 5° / 80° |
| Protection / Cabling |
Halogen-free cables |
| Service Life |
Min. 60,000 safety positions |
| Weight |
2.7 kg |
Information About BF24-TN
The BF24-TN is a fire damper actuator from Belimo engineered specifically for safety-related air control applications where dependable fail-safe performance is required. It features a robust electromechanical design with integrated spring return, supporting precise damper actuation under normal operation and automatic positioning during power interruption. The BF24-TN supports AC/DC 24 V control and includes dual auxiliary switches for position feedback and system interlocking. Its compact form factor, halogen-free cabling, and selectable mounting direction allow integration into a wide range of fire and smoke damper assemblies in commercial and industrial HVAC installations.
Key Features
- Spring-Return Fail-Safe Operation: Provides automatic damper movement to the safety position during power loss using a high-reliability spring mechanism.
- AC/DC 24 V Control Power: Supports standard low-voltage HVAC control systems with stable operation across a wide voltage tolerance range.
- High Torque Output: Delivers 18 Nm motor torque and 12 Nm fail-safe torque to ensure dependable damper positioning under load.
- Dual Auxiliary Switches: Equipped with 2x SPDT switches for precise position indication and integration with monitoring or control systems.
- Manual Override Capability: Includes a manual override with position stop to allow commissioning, testing, or maintenance without power.
- Quiet and Efficient Operation: Maintains low sound power levels during both motor-driven and fail-safe operation.
- Long Service Life: Designed for a minimum of 60,000 safety cycles to support long-term operation in critical environments.
The BF24-TN delivers the reliability and precision required for fire and smoke damper actuation in safety-critical HVAC systems.
