NFB24 Belimo Actuator
$271.60
Damper Actuator, 90 in-lb [10 Nm], Spring return, AC/DC 24 V, On/Off
NFB24 Belimo Actuator Datasheet
NFB24 Belimo Actuator Installation Guide
The Belimo NFB24 Damper Actuator is a spring-return, fail-safe actuator designed for reliable on/off airflow control in commercial HVAC systems. With 90 in-lb (10 Nm) torque and 24V AC/DC operation, this actuator provides dependable damper positioning and automatic fail-safe response during power loss.
Apex Controls supplies genuine Belimo actuators with fast U.S. shipping for contractors, OEMs, and facility professionals.
Overview
The NFB24 is part of Belimo’s proven NF series, engineered for fail-safe damper control applications. It features a spring-return mechanism that ensures the damper returns to a predetermined safety position when power is lost—critical for system protection and ventilation control.
This model operates using on/off control, making it ideal for straightforward HVAC applications that do not require modulating signals.
Key Features
- 90 in-lb (10 Nm) torque for medium-sized dampers
- Spring return (fail-safe) operation
- 24V AC/DC power supply
- On/Off control (open/close)
- Direct-coupled mounting (no linkage required)
- Reliable fail-safe positioning on power loss
- Compact, durable design for long service life
Belimo’s spring-return system ensures positive close-off and consistent fail-safe performance, even in demanding HVAC environments.
Applications
The Belimo NFB24 is commonly used in:
- Air handling units (AHUs)
- Rooftop units (RTUs)
- Zone control dampers
- Ventilation systems
- Building automation systems (BAS)
It is ideal for applications where simple open/close control with fail-safe protection is required.
Technical Specifications
| Specification | Details |
|---|---|
| Actuator Type | Spring return |
| Angle of Rotation | 95° |
| Control Type | On/Off |
| Degree of Protection | IP54; NEMA 2; UL Enclosure Type 2 |
| Direction of Rotation | Reversible with CW/CCW mounting |
| Electrical Connection | Cable |
| Manual Override | 5 mm hex crank (3/16″ Allen), supplied |
| Power Consumption (Holding) | 5 W |
| Power Consumption (Running) | 6 W |
| Running Time (Fail-safe) | <20 seconds |
| Running Time (Motor) | 75 seconds |
| Safety Function | Yes |
| Shaft Diameter | 1/2″–1.05″ round; centers on 1/2″ and 3/4″ with insert; 1.05″ without insert |
| Torque | 90 in-lb (10 Nm) |
| Voltage (AC/DC) | 24 V |
| Weight | 8 lbs |
|---|---|
| Dimensions | 7 × 13 × 5 in |
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