The Helios VK 60/35 overpressure shutter is designed with a flat profile that automatically opens when the fan is activated and closes when the fan is turned off, helping to prevent reverse airflow. It is suitable for operation with airflow velocities up to a maximum of 8 m/s.
The number of louvres varies depending on the size of the shutter, ensuring optimal airflow and effective ventilation control. This shutter provides reliable protection against backdrafts and is ideal for various ventilation system applications.