The Elta 019‑0500-STD is a 500mm flanged damper engineered to block reverse airflow when the fan is not running, maintaining proper ventilation system operation. It mounts directly to the fan case flange, allowing for straightforward installation. Made from hot dip galvanised steel, this damper offers strong corrosion resistance and durability. The butterfly blades are also constructed from galvanised steel, ensuring reliable functionality. Suitable for both horizontal and vertical (upward airflow) mounting orientations, this damper provides versatile use across various ventilation applications.