Acoustic Silencer - Circular

  • Acoustic Silencer - Circular
Product Code: MOD SIL002
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Circular acoustic silencers and attenuators

Circular silencers constructed with a mineral wool absorbent material covered with perforated metal sheet with an exterior cover of seamed sheet metal.

These units reduce the noise transmitted through ducts produced by fans. Supplied in a wide range of standard and bespoke sizes.

For connection to circular ventilation ductwork pipes manufactured with helicoid seams. Ideal for ventilation and smoke extraction units etc.

Technical Data
Cover Seamed galvanised sheet metal
Interior absorbent Mineral wool
Options Elastic mouth, special flanges, supports, flat exterior sheet metal
Principle Flow through absorbent
Max. applicable pressure 200 mm.c.d.a. (1961Pa)
Insulation 50 or 100mm
Interior Perforated metal sheet


Silencer Elbows

Ideal for use in those ventilation systems where the installation of straight silencers is not possible, or as a complement to them. There are different angles available depending on requirements 30, 45, 60 and 90°.

circular acoustic silencer cross sectional drawing

Energy losses are less than 30Pa.
To avoid the generation of turbulent noise it is recommended not to work at airflow velocities over 10 m/s.

50mm circular attenuator acoustic insertion loss data100mm circular attenuator acoustic insertion loss data

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