CDB [e]

Main features

• Round silencer with splitter / baffle 

• Type-approved in airtightness class D

• Fire resistance class EI60 (insulation thickness 100 mm)

Description

• Sound attenuative silencer with splitter (baffle) for circular air duct systems.

• The product meets airtightness class D according to EN 15727:2010, provided that the installation requirements are met.

• The product is type-approved for fire resistance class E 120.

• CDB60 achieves fire resistance class EI 60 when the required safety distances are met, depending on the product length. See the product data sheet for details.

• The product complies with the requirements for mechanical ventilation systems, according to type approval SC0234-16 in accordance with the building regulations issued by the Swedish National Board of Housing, Building and Planning.

• All technical assessment of the product, as well as certification, fire integrity testing and calculation of safety distances for fire insulation, has been carried out by RISE – Research Institutes of Sweden AB.


Versions

• CBD60: Fire resistance class EI60 (insulation thickness 100 mm).

• Available in 2–3 length options depending on the variant, see list below.

 

 

Product sizes – CDB60 (mm)

Duct dimension | External dimension | Length options

Ø315 | 500 | 600/900/1200 mm

Ø400 | 600 | 600/900/1200 mm

Ø500 | 710 | 900/1200 mm

Ø630 | 800 | 900/1200 mm

 

 

Material options

• Standard version of the product is manufactured from unpainted galvanized steel sheet (EN 10346).

• The product can also be ordered in stainless acid-resistant steel sheet (in accordance with EN 14404).

• Please contact your sales representative if aluzinc-coated steel sheet is required.


• Outer and inner casing made of unpainted galvanized steel sheet (EN 10346) with EPDM rubber gaskets.

• Insulation made of sound-absorbing, non-combustible mineral wool (in accordance with EN 12237 and classified A2-s1,d0 according to EN 13501-1), surface-coated with perforated sheet metal.

• The product can also be ordered in stainless acid-resistant steel sheet (in accordance with EN 14404).


• The following information applies to version e of the products CD (CD30/CD60), CDB (CDB60), CDV (CDB30/CDB60)

• The products meet airtightness class D according to EN 15727:2010. To comply with the requirements for airtightness class D, the attenuators must be installed according to specific requirements*).

 

Fire Resistance Classes

• The products are type-approved for fire resistance class E 120.

• Products of type XXX30 achieve fire resistance class EI 30 with a 50 mm safety distance*2).

• Products of type XXX60 achieve fire resistance class EI 60 when the required safety distances are met, depending on product size. See the operation and maintenance instructions*) for details.

 

Installation

• The products are intended for installation in a circular duct.

• During installation, suspension supports that wrap around the outer casing must be used.

• The product must not be mounted solely suspended at the connection points.

• Provide a minimum straight duct length of 4 × ØD upstream of the attenuator to ensure the stated acoustic performance.

• During installation, the applicable safety distances must be observed for the fire resistance classification to be maintained.

• See the operation and maintenance documents*) for more information on installing the product.

 

*1) Operation and maintenance instructions are provided in a separate document, ...DU-SE/...DV-DK – Operation and Maintenance (pdf), which can be downloaded from our product pages.

*2) Safety distance refers to the applicable requirements for the minimum distance between the silencer and evacuating persons or combustible materials.