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Cicular 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.
|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|
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°.
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.