Belimo EFB24 Actuator

The Belimo EFB24 is a heavy-duty spring return actuator engineered for on/off control in high-torque HVAC applications. Delivering 270 in-lb of torque, this unit is designed to automate large control dampers and specialized valve assemblies. Operating on 24VAC/DC, the EFB24 utilizes a mechanical spring return system to ensure a defined fail-safe position during power loss, providing critical protection for air handling units and industrial ventilation systems. This direct-coupled actuator features a universal clamp for easy mounting on various shaft sizes, significantly reducing installation time for contractors. The rugged housing and brushless DC motor technology ensure consistent timing and overload protection throughout the full rotation. When selecting this damper actuator, confirm the torque requirements of your specific damper to ensure optimal sealing and performance under high static pressure conditions.

Key Benefits

• 270 in-lb Torque Output: Provides reliable automation for oversized dampers and high-pressure air systems.
• Mechanical Spring Return: Ensures a dependable fail-safe sequence to protect equipment during power interruptions.
• Multi-Voltage Compatibility: Operates on both 24VAC and 24VDC for flexibility across different control circuits.
• Brushless DC Motor: Delivers precise speed control and increased longevity compared to brushed alternatives.
• Simple Installation: Direct-mount design with a universal neck clamp eliminates the need for complex linkages.

Common Questions

What is the typical run time for the EFB24 during power-on operation?
The motor typically completes its 90-degree rotation in less than 75 seconds, while the spring return provides a faster fail-safe response, usually under 20 seconds.

Can several EFB24 actuators be wired in parallel?
Yes, multiple units can be connected to a single controller, provided the transformer's VA rating is sized correctly to handle the combined power draw.

Does the EFB24 support auxiliary switches for position feedback?
Standard models are for on/off control, but certain variations in the EFB series support add-on switches for end-stop verification in automation sequences.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.