Belimo EFB24-SR-N4 Spring Return Damper Actuator in-lb - 270 24V 2-10VDC

The Belimo EFB24-SR-N4 is a spring return damper actuator designed for reliable control of HVAC dampers in commercial and industrial applications. This actuator delivers 270 inch-pounds of torque and operates on 24V AC/DC power, providing dependable performance in both new installations and retrofit projects.

Key Features:

• 270 in-lb torque output for dampers up to approximately 15 square feet
• Spring return functionality ensures fail-safe positioning during power loss
• 2-10 VDC control signal for precise modulating control
• NEMA 4/IP54 rated enclosure for protection against dust and moisture
• 24V AC/DC universal voltage operation
• Direct-coupled mounting for secure connection to damper shafts
• 90-degree rotation angle (0° to 90°)
• Integrated auxiliary switches for status feedback
• Manual override for commissioning and emergency operation

This actuator is ideal for controlling air volume in ventilation systems, economizer dampers, and other HVAC applications requiring fail-safe spring return operation. The NEMA 4 rating makes it suitable for both indoor and outdoor installations where weather resistance is required.