Belimo Fail-Safe Actuators
Belimo Fail-Safe Actuators – Reliable Safety and Precision for Critical HVAC Applications
When safety and operational continuity are non-negotiable, Belimo Fail-Safe Actuators provide the trusted performance demanded by industries worldwide. Designed to return to a predefined safe position during a power failure, these actuators ensure protection for systems, equipment, and occupants in critical environments. From commercial HVAC systems to specialist industrial applications, Belimo’s range of fail-safe actuators delivers dependable control, energy efficiency, and long service life.
What Are Fail-Safe Actuators?
A fail-safe actuator automatically reverts a damper or valve to a predefined safe position (open or closed) when power is lost. This functionality is crucial for maintaining system safety and preventing equipment damage or operational hazards.
Belimo Fail-Safe Actuators use either spring-return or advanced electronic fail-safe technology to ensure the actuator always reaches its intended safe position quickly, reliably, and without manual intervention.
The Belimo Fail-Safe Actuator Range
Belimo offers an extensive selection of fail-safe actuators, each tailored to specific torque requirements, damper sizes, and industry needs.
TF Actuator Range
Models: TF24, TF24-S, TF230, TF230-S, TF24-SR, TF230-SR
LF Actuator Range
Models: LF24, LF24-S, LF230, LF230-S, LF24-SR
Voltage: 24V to 230V
Torque: 4Nm
Max Damper Size: 0.8m²
Fail-Safe Position Time: <20s
Motor Running Time (90°): 40–75s / 150s
Perfect for small to medium dampers in air handling and VAV systems, providing rapid and reliable closure.
NF Actuator Range
Models: NFA, NFA-S2, NF24A, NF24A-S2, NF24A-SR, NFS4A-SR-S2
Voltage: AC24–240V, DC24–125V
Torque: 10Nm
Max Damper Size: 2m²
Fail-Safe Position Time: <20s
Motor Running Time (90°): 75s / 150s
A versatile choice for mid-sized dampers across ventilation, smoke control, and pressure regulation systems.
SF Actuator Range
Models: SFA, SFA-S2, SF24A, SF24A-SR, SF24A-SR-S2
Voltage: AC24–240V, DC24–125V
Torque: 20Nm
Max Damper Size: 4m²
Fail-Safe Position Time: <20s
Motor Running Time (90°): 75s / 150s
Built for larger dampers in air handling units, offering robust torque and reliable spring return.
EF Actuator Range
Models: EF24A, EF24A-S2, EF230A, EF230A-S2, EF24A-SR, EF24A-SR-S2
GK Actuator Range
Models: GK24A-1, GK24A-SR
Voltage: 24V
Torque: 40Nm
Max Damper Size: 8m²
Fail-Safe Position Time: 35s
Motor Running Time (90°): 150s
The powerhouse of the range, ideal for very large dampers in high-capacity ventilation and industrial systems.
The importance of Belimo Fail-Safe Actuators spans across multiple industries where safety and performance are paramount:
Commercial Buildings – Ensuring safe ventilation shutdown or adjustment in office towers, shopping centres, and educational facilities.
Hospitals & Healthcare – Maintaining safe air control in operating theatres, isolation rooms, and critical care areas.
Data Centres – Protecting sensitive equipment by controlling airflow and temperature during emergencies.
Pharmaceuticals & Labs – Maintaining contamination control and airflow integrity during power outages.
Industrial & Manufacturing – Managing air handling for processes where unplanned airflow could cause safety or quality issues.
Marine & Offshore – Controlling ventilation in engine rooms and accommodation spaces with strict safety requirements.
Why Choose Belimo Fail-Safe Actuators?
Proven Reliability – Built to last in demanding conditions with rigorous quality control.
Precision Engineering – Smooth operation with accurate positioning every time.
Energy Efficiency – Low power consumption without compromising performance.
Application Versatility – From small dampers to industrial-scale ventilation systems.
Conclusion
When failure is not an option, Belimo Fail-Safe Actuators deliver the assurance that your HVAC system will act exactly as intended in critical moments. Whether your project calls for compact torque or industrial-strength power, Belimo’s fail-safe range offers the perfect solution for safety, compliance, and efficiency.
Contact us today for technical advice, specifications, and competitive pricing on the full Belimo range.
