Spring Return Damper Actuators

Spring return damper actuators are widely used in HVAC and fire protection (smoke control and fire damper) systems. They operate on a spring return mechanism that automatically drives the actuator back to its preset fail-safe position (open or closed) in the event of a power failure or when triggered by the control system. For example, if the damper is designed to return to the closed position, the actuator will automatically drive the damper fully open during operation and then return it to the closed position once power is removed. Belimo offers a comprehensive range of spring return damper actuators with various torque ratings (Nm) and power supply options of 24 V or 230 V. Belimo spring return actuators for air dampers and fire & smoke dampers are high-performance products and hold the world's No. 1 market position in this category.