HAS Acoustic offer a range of circular attenuators in standard diameters from 100mm to 400 diameter. CR25 attenuators are available in standard 300mm, 600mm, 900mm and 1200mm lengths with non-standard lengths available on request.
Attenuator construction for this range comprises a pre-galvanised sheet steel spiral wound outer casing, manufactured in accordance with HVCA DW144 specification, with circular spigotted end caps. The inner bore is manufactured from pre-galvanised and perforated spiral wound steel tube retaining a 50mm thick scrim faced 45kg/cu.m acoustic media.
Acoustic medias of alternative specification and thickness can be supplied on request.
The CR25 range of circular attenuators offer minimal resistance to airflow and can be used for a variety of noise control applications:-
• Small fan system attenuation
• System noise regeneration attenuation
• Cross-talk attenuation
• System terminal unit attenuation