A Belimo fail-safe actuator ensures that a damper or control element automatically moves to a predefined safe position when power is lost, protecting people, equipment, and building systems during faults or emergencies.

These actuators use an internal spring return mechanism. When power is removed, the stored spring energy instantly drives the actuator to its safe position without relying on external power.

MFT stands for Multi-Function Technology. It allows a single actuator to be configured for modulating, on/off, or floating control, giving engineers flexibility without changing hardware.

Yes. Belimo fail-safe actuators can be configured to move either fully open or fully closed on power loss, depending on the safety requirements of the application.

They are commonly installed on fire and smoke dampers, air handling units, ventilation systems, and safety-critical HVAC applications in data centres, hospitals, offices, and industrial buildings.

Response times vary by model, but most are designed to reach the safe position in seconds, ensuring rapid protection during emergency conditions.

Yes. In normal operation, power is used to hold the working position. When power is removed, the spring return automatically drives the actuator to its fail-safe state.

They are engineered for continuous duty, high cycle life, and long-term reliability in demanding HVAC environments.

Yes. MFT-enabled models integrate easily with BMS platforms, providing precise control, feedback signals, and monitoring capability.

Maintenance is minimal and usually limited to periodic functional testing and visual inspection. The spring mechanism is sealed and designed for long service life.

Many models feature robust housings and high ingress protection ratings, making them suitable for plant rooms, rooftops, and exposed HVAC installations.

Selection depends on damper size, required torque, control method, supply voltage, and environmental conditions. Matching these factors ensures safe operation and long-term performance.