Airfoil Manufacturing Pty Ltd

CAK

Plastic circular silencers for the reduction of noise in the circular ducts of extract air systems for aggressive media

• 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 flame-resistant polypropylene (PPs) to DIN 4102, building class B1
• Variant with spigot suitable for circular ducts according to DIN 8077 or DIN 8078
• Insertion loss measured according to ISO 7235
• Casing air leakage to EN 15727, class D