Sheet metal ventilation aperture silencer CB

mineral wool

FOR THE INCREASED REDUCTION OF NOISE IN CIRCULAR DUCTS, GALVANISED SHEET STEEL CONSTRUCTION Circular silencers made of galvanised sheet steel for the reduction of noise in circular ducts of air conditioning systems, with increased insertion loss due to sound absorbing pod Absorption material is non-combustible mineral wool with RAL quality mark, biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC Mineral wool faced with glass fibre as protection against erosion due to airflow velocities up to 20 m/s Casing, perforated inner duct and pod are galvanised sheet steel Pod with domed end upstream to reduce the differential pressure Variant with spigot has a groove for a lip seal, suitable for circular connecting ducts to EN 1506 or EN 13180 Insertion loss measured according to ISO 7235 Casing air leakage to EN 15727, class B Optional equipment and accessories With flanges on both ends Lip seal Application Circular silencers Type CB for the reduction of air-regenerated noise in the circular ducts of air conditioning systems For the reduction of air-regenerated noise For the reduction of fan noise Special features Insertion loss measured according to ISO 7235 Increased insertion loss due to sound absorbing pod Pod with domed end upstream to reduce the differential pressure Absorption material is non-combustible Insulation thickness 50 mm or 100 mm Nominal sizes 250, 315, 400, 450, 500, 560, 630, 710, 800, 900, 1000 mm