Belimo NFB24-SR-S Damper Actuator

Damper Actuator performance for HVAC is enhanced with the Belimo NFB24-SR-S. This high-quality Damper Actuator supports ON/OFF, direct-coupled, and modulating operation with spring-return for reliable damper positioning.

Powered by 24 Volt AC/DC, it delivers 3.5 Watts running and 2.5 Watts holding, providing 90 Inch-Pound torque across a 95° rotation. The control output is 2 to 10 Volt DC (0.5 mA) for precise damper positioning within typical HVAC sequences. Built for demanding environments, the enclosure is NEMA 2 / IP54, and the unit operates from -22 to 122 °F. A rugged zinc-coated metal body with a plastic casing keeps the actuator durable in service. It includes a 5 millimeter hex crank and (2) SPDT auxiliary switches for additional control options, and carries UL, CE, CAN/CSA E60730, and ISO 9001 approvals for quality assurance and reliability.

• Voltage: 24 V AC/DC
• Torque: 90 Inch-Pound
• Rotation: 95 degrees
• Output: 2–10 V DC, 0.5 mA
• Enclosure: NEMA 2 / IP54
• Operating Temp: -22 to 122 °F
• Includes: 5 mm hex crank, (2) SPDT auxiliary switches
• Compliance: UL, CE, CAN/CSA E60730, ISO 9001