Products > Acoustic > Circular sound attenuator

Circular sound attenuator


The sound attenuators are used to absorb the noise in air conditioning or ventilation ducts.


  • Steel casing;
  • Mounting flange with treaded insert;
  • Acoustic material in mineral wool 60 kg /m³ with protection against erosion by glass fibre fire resistance A1 and extended metal net;
  • Operating mineral wool temperature: 400°C (peak 500 °C)
  • Melting transparent polyester film: 250°C;
  • Streamlining assembly with self-locking bolts;


  • With or without internal streamlining insert;
  • Casing in painted carbon steel, galvanized steel and stainless steel on request.
  • Possibility of mounting the lifting ring;