RCK

Product Selection

• Product selection is made using the product code based on sizing requirements; use the product datasheet (pdf) or the web-based SELECTOR sizing tool for product selection.

 

Product sizes – general (mm)

• Sound attenuator in standard version:

– External dimensions correspond to connection dimensions.

• Sound attenuator with recessed duct connection:

– Connection dimensions are max. 200 mm smaller than the width.

• Sound attenuator with inspection panels:

– The inspection panels are equipped with handles for easy access.

– The attenuator’s splitters/baffles run on U‑profiles.

– External dimensions correspond to the connection size, excl. handles.

• Angled/elbow sound attenuators are manufactured and specified in horizontal and vertical versions.

 

 

Dimensions – all versions (W x H = Width x Height)

• Standard version of the product is supplied in 100 mm increments in width and height, adjustable independently within the following range:

– W_min x H_min = 500 x 300 mm.

– W_max x H_max = 3200 x 2000 mm.

 

Length options – straight variants (L = Length)

• Standard version of the product is supplied in 50 mm increments within the following range:

– L_min = 650 mm.

– L_max = 2450 mm.

 

Length options – angled variants (L = Length)

• Standard version of the product is supplied in 50 mm increments within the following range:

– L_min = 500 mm.

– L_max = 2000 mm.

• Length L, is measured along the centerline

• The following relation applies for length L relative to the inner angle arms Z (inlet) and Y (outlet):

– Horizontal version: L = W + Z + Y

– Vertical version: L = H + Z + Y

• A minimum of 150 mm applies for Z and Y in standard version of the product.

 

 

Special versions

The product can be ordered in special versions:

• Flanged connection instead of slide rail connection.

• Internal and external epoxy coating.

• Stainless steel construction.

• Contact our sales if aluzinc-coated steel sheet is required.

• Outer casing, splitters (baffles) and guide rails made of unpainted galvanized steel sheet.

• Insulation made of washable, sound-absorbing, non-combustible mineral wool, surface-coated with perforated sheet metal.

• The product is designed for installation in rectangular ducts and is supplied with a slide rail connection.

• The product can also be supplied with a flanged connection (specified when ordering) and is then mounted to a mating flange using bolts and nuts.

• To meet airtightness class C requirements, the attenuator must be installed according to specific guidelines, usually the installation instructions provided by the duct system manufacturer.

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

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

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

• 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.