Belimo NFBUP Motor Actuator

The Belimo NFBUP is a robust spring-return damper actuator designed for reliable on/off control in demanding HVAC systems. This mechanical fail-safe unit provides 90 in-lb of torque, ensuring consistent operation of control dampers and valves during power interruptions. Engineered with a universal power supply, the NFBUP accepts 24 to 240 VAC or 24 to 125 VDC, offering maximum job site flexibility for contractors. The brushless DC motor technology regulates speed and power consumption, extending the service life compared to traditional brushed motors. Its rugged NEMA 2 housing protects internal components, making it suitable for a variety of air handling and industrial applications. Precise damper linkage integration is simplified by the manual override crank and adjustable running time parameters. This actuator is a standard choice for technicians requiring dependable HVAC automation and fail-safe performance in critical ventilation sequences.

• Universal Compatibility: Operates on any voltage from 24V to 240V, simplifying inventory and field replacements.
• True Spring Return: Provides 90 in-lb of torque to ensure positive seal-off and safety during power loss.
• Maintenance-Free Design: High-efficiency brushless DC motor eliminates the need for routine internal servicing.
• Simple Installation: Standard clamp-on linkage accommodates most damper shaft sizes and orientations.
• Electronic Overload Protection: Prevents motor burnout by automatically sensing end-of-stroke mechanical limits.

Can the direction of the fail-safe rotation be changed?
Yes, the direction of the spring-return is determined by the mounting orientation of the actuator on the damper shaft (CW or CCW).

What is the typical running time for the NFBUP?
The motor drive time is approximately 75 seconds, while the spring-return closing time is rated at less than 20 seconds at ambient temperature.

Does this unit require an auxiliary switch for position feedback?
The NFBUP is a basic on/off model; if you require end-switch signaling for status monitoring, ensure you are utilizing the -S model or an external add-on kit.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.