Non Return Damper - Duct Mounted

DESCRIPTION:

• The frame and blades are made of high-quality extruded aluminium profiles, providing corrosion resistance and rigidity.
• Air-operated damper blades are fixed to the frame using self-lubricating metal bushes and reinforced end-to-end with round metal pipes.
• Blade edges are sealed with a foam gasket to prevent rattling noise and provide airtight operation.
• The blades open fully or at any angle depending on the air velocity. They remain stable without fluctuating when the airflow is constant.
• The blades close quietly when the airflow stops.
• Designed to maintain a constant pressure level inside pressurised rooms by relieving excess air when it exceeds the desired limit.
• Generally installed in diesel generator rooms, plant room ventilation systems and exhaust ducting.
• Available in square and rectangular sizes.
• The frame has a 40 mm flange for duct mounting.
• Brass bushes and steel reinforcements are available as optional features for heavy-duty applications. Model: ANRD-D-AL-H.