Belimo NFB24-SR-S Spring Return Actuator 24V 60 in-lb 2-10VDC with Auxiliary Switch

The Belimo NFB24-SR-S is a spring return damper actuator designed for reliable control of HVAC dampers in commercial and industrial applications. This 24V actuator delivers 60 in-lb (7 Nm) of torque, providing sufficient force for most standard damper installations.

Key Features:

• Spring return design ensures fail-safe damper positioning during power loss
• 60 in-lb (7 Nm) torque rating for positive damper control
• 2-10 VDC modulating control signal for proportional damper positioning
• Integrated auxiliary switch for end position feedback and interlock functions
• 24 VAC/DC power supply compatible with standard HVAC control systems
• Direct mount design for quick installation and reduced labor costs
• Replaces legacy NF24-SR model for upgrade applications

This actuator is ideal for mixing dampers, outdoor air dampers, and other HVAC applications requiring modulating control with spring return safety. The auxiliary switch provides critical feedback for building automation systems, enabling precise monitoring of damper position and system status.