Collection: Damper Actuators - Non-Spring Return

Non-spring return damper actuators maintain their last commanded position when power is lost, relying on continuous control signal power to hold position. This makes them ideal for applications where a specific damper position — open, closed, or modulating — must be preserved regardless of power interruptions. Well-suited for VAV boxes, air handling units, and energy recovery ventilators. Available from Belimo and Siemens.