Pressure Relief Damper

• Spring-loaded blades open automatically at set pressure differential
• Adjustable set point — typically 12–50 Pa
• Galvanized steel frame with aluminium or steel blades
• Used in pressurized stairwells, lift lobbies, and plant rooms
• Closes tight under normal operating conditions
• Available in single and multi-blade configurations
• Sizes from 300mm × 300mm to 900mm × 600mm
• Low air leakage when closed — Class 3 per EN 1751