The Elta 019‑0630-STD is a 630mm flanged damper designed to stop reverse airflow when the fan is not operating, helping maintain efficient ventilation system performance. It is fitted directly to the fan case flange for secure and straightforward installation. Constructed from hot dip galvanised steel, the damper offers strong corrosion resistance and long-lasting durability. The unit includes galvanised steel butterfly-type blades to ensure reliable operation and proper airflow direction. This damper is suitable for both horizontal and vertical (upward airflow) mounting, providing versatility for various ventilation applications.