Galvanized steel ventilation damper AK

FOR LOW-LEAKAGE SHUT-OFF Circular shut-off dampers for shutting off volume flows in ventilation ducts of air conditioning systems Maintenance-free damper blade mechanism Closed blade air leakage to EN 1751, up to class 4 Casing air leakage to EN 1751, class C Optional equipment and accessories Electric actuator Spring return actuator Pneumatic actuator Auxiliary switch with adjustable switching points for capturing the end positions Circular shut-off dampers for shutting off or restricting the airflow in ventilation ducts of air conditioning systems, for supply air or extract air, available in 7 nominal sizes Ready-to-install shut-off damper, unit consists of the casing with damper blade. Position of the damper blade indicated externally at the shaft extension. SPECIAL CHARACTERISTICS - Damper blade can be actuated manually, electrically or pneumatic - Low-leakage shut-off MATERIALS AND SURFACES - Casing, damper blade and shaft made of galvanised sheet steel - Blade seal made of TPE plastic - Plastic bearings CONNECTION TYPE Spigot with groove for lip seal, suitable for connecting ducts according to circular ducts to EN 1506 or EN 13180 TECHNICAL DATA - Flow rate range: 90 - 900 m³/h - Maximum permissible differential pressure: 1500 Pa - Casing air leakage according to EN 1751: Class C - Closed blade air leakage to EN 1751: Class 3