Belimo NFB24-S-N4 Spring Return Damper Actuator 90 In-Lb

Belimo · Motors & Motion

Description  The Belimo NFB24-S-N4 Damper Actuator is a spring return HVAC actuator designed for reliable air damper control in commercial and industrial ventilation systems. Operating on 24 V power, the actuator delivers 90 in-lb torque with on/off control functionality and NEMA 4 enclosure protection for demanding environmental conditions. Its reversible mounting configuration and rugged housing design support dependable airflow management in indoor and outdoor HVAC applications.   Technical Specifications  Condition New/Never Used Surplus Brand Belimo Category HVAC Controls Part Number NFB24-S-N4 Subcategory Damper Actuators Product Type Damper Actuator Control Type On/Off Spring Return Yes Torque Output 90 In-Lb Voltage Rating 24 V Enclosure Rating NEMA 4 Application Air Dampers Motor Type Brushless DC Rotation Angle 95° Spring Return Time Less Than 60 Seconds Auxiliary Switches 2 SPDT, 3A @ 250V Manual Override Manual Crank Input Impedance 100 kΩ @ 0/2-10 VDC; 500 Ω @ 4-20 mA Operating Temperature -22°F to 122°F (-30°C to 50°C) Operating Humidity 5 to 95% RH Approvals cULus, CE, RoHS Conduit Connection Four Knockouts for Waterproof Fittings Life Expectancy 60,000 Cycles / 500,000 Repositions Noise Level Less Than 62 dB Weight 6 lb     Information About NFB24-S-N4 The NFB24-S-N4 is a heavy-duty damper actuator manufactured by Belimo for controlling air dampers in HVAC and building automation systems. Designed with spring return operation, the actuator automatically returns dampers to their fail-safe position within 60 seconds during power interruption or emergency shutdown conditions. The actuator incorporates a brushless DC motor, manual override crank, and dual SPDT auxiliary switches for enhanced operational flexibility and monitoring capability. Built with NEMA 4 environmental protection, waterproof conduit compatibility, and cULus, CE, and RoHS approvals, the unit is suitable for commercial and industrial installations requiring durable actuator performance. Key Features: 90 In-Lb Torque Output: Provides reliable operation for commercial HVAC air dampers. Spring Return Functionality: Automatically returns dampers to the fail-safe position during power loss. NEMA 4 Enclosure Protection: Supports operation in demanding indoor and outdoor environments. On/Off Control Operation: Enables dependable two-position damper control. Brushless DC Motor: Delivers efficient and long-life actuator performance. Manual Override Crank: Allows manual actuator positioning during maintenance or setup. Dual SPDT Auxiliary Switches: Supports equipment monitoring and control integration. Reversible CW/CCW Mounting: Enables flexible actuator installation orientation. The NFB24-S-N4 delivers the reliability and precision required for commercial and industrial HVAC damper control applications.

Brand: Belimo · Category: Motors & Motion

Key features

• 90 In-Lb Torque Output: Provides reliable operation for commercial HVAC air dampers.
• Spring Return Functionality: Automatically returns dampers to the fail-safe position during power loss.
• NEMA 4 Enclosure Protection: Supports operation in demanding indoor and outdoor environments.
• On/Off Control Operation: Enables dependable two-position damper control.
• Brushless DC Motor: Delivers efficient and long-life actuator performance.
• Manual Override Crank: Allows manual actuator positioning during maintenance or setup.
• Dual SPDT Auxiliary Switches: Supports equipment monitoring and control integration.
• Reversible CW/CCW Mounting: Enables flexible actuator installation orientation.

Specifications

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