CDV [e]

Main features

• Circular angled/elbow sound attenuator

• Type-approved in airtightness class D

• CD30: fire resistance class EI30 (insulation thickness 50 mm)

• CD60: fire resistance class EI60 (insulation thickness 100 mm)

Description

• Angled elbow type, sound attenuative silencer for 90° bends in 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.

• CDV30 achieves fire resistance class EI 30 with a 50 mm safety distance.

• CDV60 achieves fire resistance class EI 60 when the required safety distances are met, depending on the product size. 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.


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.

 

 

Versions

• CDV30: Fire resistance class EI30 (insulation thickness 50 mm).

• CDV60: Fire resistance class EI60 (insulation thickness 100 mm).

 

 

Product sizes – CD30 (mm)

Duct dimension | External diameter | Radius rm*)

Ø125 | 224 | 260

Ø160 | 260 | 285

Ø200 | 315 | 356

Ø250 | 355 | 370

Ø315 | 450 | 450

Ø400 | 500 | 600

 

Product sizes – CD60 (mm)

Duct dimension | External diameter | Radius rm*)

Ø125 | 315 | 260

Ø160 | 355 | 280

Ø200 | 400 | 326

Ø250 | 450 | 370

Ø315 | 500 | 375

Ø400 | 600 | 420

Ø500 | 710 | 510

Ø630 | 850 | 611

 

*) The dimension (rm)  refers to the internal radius measured from the centreline. See the product sheet for details.


• 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.