The RD-A Airtight Regulation Damper is designed for precise airflow shut-off in round ventilation ducts. Made of galvanized steel, the damper features a rubber-sealed blade to enhance sealing performance. Complies with DIN 1946 (part 4) and meets EN1751 standards with casing airtightness class C and blade class 3. The damper can be equipped with a motor drive (24V, 230V, ATEX rated) and offers multiple control options, including two-position and continuous regulation. Ideal for HVAC systems requiring high sealing efficiency and automated airflow control.

• For shutting off airflow in round ducts
• Produced according to DIN 1946 (part 4)
• Casing and damper blade made of galvanized steel sheet. Rubber seal on blade for better sealing characteristics
• Casing airtightness according to EN1751, class C
• Damper blade airtightness according to EN1751, class 3