The JOVENTA SECURITY FIRE electric, spring return damperactuator series has been specially developed for the motorized operation of safety dampers e.g. fire and smoke protection dampers. When the control signal is applied the actuator drives the damper to the operational position, while evenly tensioning the integrated spring. After a power failure the stored energy in the spring immediately brings the damper to the safety position. Manual operation is automatically cancelled when the actuator is in electrical operation.