The RAS range of silencers have high acoustic performance, high quality construction and low pressure drops; all models have aerodynamic edges on the air intake side of the panels to reduce airflow resistance and keep noise regeneration to a minimum.
The sound-absorbing panels are made from non-combustible mineral fibre with high noise absorption properties; the standard version is coated with a reinforced glass veil. The RAS-LF version, however, is made with panels that are protected by a perforated plate. They are housed between the galvanised sheet steel supporting frames, attached to the surface of the structure. The silencers have flanges at both ends to help with attaching them to the air ducts. Special versions of the silencers are available with perforated plates and protective polyester membrane (HOSP suffix) for special applications (e.g. Hospitals, food and electronics industries).
An AIR TIGHT version is also available, which is sealed along the flanges, corners and longitudinal joints.
RAS silencers are used in air-conditioning and ventilation systems to reduce the noise generated by fans and carried along by the airflow.
They are suitable for use in civil, industrial and bespoke systems and provide high levels of noise abatement.
RAS silencers are most commonly installed in ventilation ducts, with horizontal or vertical airflows (VERT version on request).
They are mounted using the flanges that the silencer comes with, which are attached to those of the duct.
The position of the silencer must be carefully evaluated to ensure no noise is returned into the duct downstream of the silencer itself.