Sheet metal ventilation aperture silencer CA

mineral wool

FOR THE REDUCTION OF NOISE IN CIRCULAR DUCTS, GALVANISED SHEET STEEL CONSTRUCTION Circular silencers Type CA for the reduction of noise in the circular ducts of air conditioning systems 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 non-woven glass fibre as protection against erosion due to airflow velocities up to 20 m/s Casing and perforated inner duct are galvanised sheet steel 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 With lip seals on both ends Application Circular silencers Type CA for the reduction of noise in the circular ducts of air conditioning systems For the reduction of air-regenerated noise of air terminal units such as LVC and TVR, and of mechanical self-powered controllers such as RN and VFC For the reduction of fan noise Can be used as cross talk silencer to reduce the transfer of noise through ducts between neighbouring rooms Special features Insertion loss measured according to ISO 7235 Absorption material is non-combustible Insulation thickness 50 mm or 100 mm Nominal sizes 100, 125, 160, 200, 250, 315, 400, 450, 500, 560, 630, 710, 800 mm For VAV terminal units and CAV controllers 100, 125, 160, 200, 250, 315, 400 mm