Belimo NFB24-SR Proportional Spring Return Actuator
The BELIMO NFB24-SR is a proportional, spring-return fail-safe actuator for dampers, operating on 24V AC/DC with a 3.5W power rating. It provides a 90° stroke with CW/CCW shaft rotation and is hardwired for…
SKU 3G-OTH-67682
Also listed as: NFB24SR · NFB24 SR
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
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Product Description
The BELIMO NFB24-SR is a proportional, spring-return fail-safe actuator for dampers, operating on 24V AC/DC with a 3.5W power rating. It provides a 90° stroke with CW/CCW shaft rotation and is hardwired for electrical connection. This actuator is compatible with building automation systems and features a NEMA 2 / IP54 enclosure rating.
Frequently Asked Questions
What is the BELIMO NFB24-SR actuator used for?
The BELIMO NFB24-SR is a proportional, spring-return fail-safe actuator designed for HVAC dampers in building automation systems. It provides 90° stroke with CW/CCW rotation to control air flow in commercial ventilation, ensuring damper closure on power loss.
What are the specifications of the BELIMO NFB24-SR?
The BELIMO NFB24-SR operates on 24V AC/DC with a 3.5W power rating, delivering 90 in-lb torque. It features a 90° stroke, CW/CCW shaft rotation, hardwired connection, and NEMA 2 / IP54 enclosure. It is compatible with building automation systems and includes no auxiliary switch.
Where to buy the BELIMO NFB24-SR worldwide?
You can source the BELIMO NFB24-SR through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine BELIMO actuators for building automation projects.
How to install the BELIMO NFB24-SR actuator?
Mount the BELIMO NFB24-SR directly onto the damper shaft using the provided bracket, ensuring the shaft rotates freely. Connect 24V AC/DC power via hardwired terminals per the wiring diagram. After mounting, verify the spring-return direction (CW/CCW) matches damper fail-safe position. Test operation before commissioning.
Belimo Products
3G Electric supplies Belimo fail-safe actuators with spring return. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
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Compatible alternatives & equivalents
- Belimo On/Off spring return actuator for HVAC dampers, delivering 90 in-lb torque. Operates on 24V AC/DC with 6W power, 95° stroke, and CW/CCW rotation. Plenum rated with hardwired cables, compatible with BACnet IP building automation systems
- Belimo Proportional, non-spring return damper actuator with 90 in-lb torque, 24V AC/DC input, 1.5W power rating, 95° stroke, CW/CCW rotation, hardwired connection, and NEMA 2 / IP54 enclosure. Used in HVAC systems to modulate dampers for airflow, temperature, or pressure control in building automation applications
