Secondary silencer

Circular silencers, in flexible aluminium construction, 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
• Casing and perforated inner duct made of aluminium
• 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 D

Optional equipment and accessories

• Socket-type spigots on both ends
• Raised edges at both ends
• With lip seals on both ends

• Attenuation effect due to absorption
• The sound absorbing material is non-combustible mineral wool and nonhazardous to health according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC
• Acoustic data measured to ISO 7235
• Leakage class C or D (depending on size) to EN 15727.
• For use in areas with potentially explosive atmospheres (according to EC Directive 2014/34/EU (ATEX)), zones 1, 2, and zones 21 and 22 (outside) according to EC Directive 1999/92/EC

• Spigot with lip seal, for circular connecting ducts to EN 1506 or EN 13180
• Socket-type spigot suitable for circular ducts to EN 1506 or EN 13180

Rectangular secondary silencer to reduce air-regenerated noise, suitable for air terminal units type TVJ, TVT and EN

• Sound absorption material made of non-combustible mineral wool with RAL quality mark, non-hazardous to health due to high biosolubility in accordance with the German Hazardous Substances Ordinance and Note Q of the European Regulation (EC) No. 1272/2008
• Mineral wool faced with glass fibre fabric as a protection against erosion, effective with airflow velocities up to 20 m/s
• Insertion loss measured according to ISO 7235.
• Casing air leakage according to EN 15727, class C

Rectangular secondary silencers for the reduction of air-regenerated noise of air terminal units Type TVZ, TVA, TZ-Silenzio, TA-Silenzio or TVM

• 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/EG
• Mineral wool faced with glass fibre fabric as protection against erosion due to airflow velocities up to 20 m/s
• Insertion loss measured according to ISO 7235
• Casing air leakage to EN 15727, class B