Belimo NFB24-SR Damper Actuator

Belimo NFB24-SR Damper Actuator delivers reliable airflow control for HVAC systems. This spring-return, direct-coupled actuator supports both ON/OFF and Modulating operation, offering flexible damper control in commercial and residential projects. With a 24-volt supply (AC/DC) and a 50/60 Hz rating, it delivers consistent performance in standard environments.

Designed for harsh environments, the NFB24-SR combines rugged construction with precise control. Its 90 in-lb torque and 95° travel provide ample actuation for most dampers, while the 2–10 VDC control signal supports modern variable-speed schemes. The unit features a NEMA 2, IP54 enclosure and a zinc-coated metal body for long life. Includes a 5 mm hex crank and a 3 ft, 18 AWG appliance cable with a 1/2" conduit connector for quick installation.

• Supply: 24V AC/DC, 50/60 Hz
• Operation: Spring-return with ON/OFF and Modulating capability
• Torque/Travel: 90 in-lb, 95° rotation
• Control: 2–10 VDC output (0.5 mA)
• Enclosure: NEMA 2 / IP54; zinc-coated metal, plastic casing
• Electrical/Dimensions: 3.15" W x 3.42" D x 9.69" H; shaft 1/2"–1.05"
• Includes: 5 mm hex crank; 3 ft 18 AWG cable with 1/2" conduit
• Approvals: UL (Canada/US), UL 60730, CE, CAN/CSA E60730, ISO 9001