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Annular ring circular silencers - Model 242 standard grade, sheet metal construction - dB Noise Reduction



  • Fan inlet and outlet silencers
  • Pressure blower inlet silencers
  • Exhaust stack silencers
  • Ventilation intake and discharge silencers


  • Excellent alternative to parallel baffle circular silencers. Ideal for use on large axial fans requiring low pressure, symmetric airflow
  • Good choice for use as insert silencers and when small passage widths are required for mid to high frequency attenuation

Advantages over welded silencers

  • 20% to 30% cost savings
  • Much lighter than welded silencers
  • Suitable for many light/medium industrial applications


  • Galvanized and stainless steel mesh bird, insect and safety screens
  • Drilled flanges matched to the connecting equipment or ductwork
  • Mounting brackets, support legs, saddles and feet for silencer installation
  • Access panels and doors for inspection of internals
  • Variety of fabric, film and mesh baffle liners available for different types of service
  • Pressure and flow measurement devices including pressure taps, rings and piezometer tubes

Design options

  • Cleanable and removable annular baffle ring designs for dirty applications
  • Insert silencers (annular rings and support structure, without casing) for installation in pre-existing ductwork and stacks
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Annular ring circular silencer features

Annular ring circular silencer features - image - dB Noise Reduction

Alternative construction - Model 243, industrial grade, all welded construction

Product details


Up to 400,000 acfm


Up to 30" wg


Up to 250° F


From 36" ID X 36" long
to 120" ID X 120" long

Unit weight:

Up to 5,000 lbs


Mill galvanized (standard). Stainless steels
and aluminum available


20 ga to 16 ga welded sheet metal casings
with 22 ga acoustic baffles

Paint finishes:

Alkyd and enamel finishes available

For other customized silencer designs, please contact us and we will be happy to assist you.


Servicing clients in the US, Canada, Mexico, and many international locations worldwide.