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Rectangular Vertical Bend Duct Attenuator - Sound Attenuation

Verified by manufacturer 4 months ago

Allaway Acoustics Ltd

Rectangular vertical bend duct sound attenuators, made to order.

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+44 (0)1992 550825 Website

Application

Sound attenuation.

Description

Rectangular vertical bend duct sound attenuators.


Features and benefits:

  • Made to order (no standard sizes).
  • Constructed in accordance with DW 144 specification for medium pressure (Class B) ductwork as standard. Class C construction also available.
  • Airflow can be in either direction.
  • Cases are stiffened and fitted with proprietary flanges.
  • Both models have sound absorbent splitters arranged vertically within the casing to form side linings. Model SP has central splitters.
  • Splitters and side linings contain a sound-absorbent infill that is encapsulated with glass cloth and plain/ perforated steel.
  • Splitters have aerodynamic fairings at each end.
  • Large attenuators will be of modular construction for ease of handling and may be split on the length, width and height. or combination thereof.
  • Note that attenuators are supplied without support steelwork, brackets, fixings, gasket, mastic or other such items unless specified otherwise.
  • Part of a range of duct attenuators; other models specified separately.

General information

Color

Silver

Other

Protective paint finish (optional; visible external metal surfaces only).

Finish

Galvanized

Natural

Painted

Protective paint finish (optional; visible external metal surfaces).

Material

Steel

Stainless steel

Shape

Rectangle

Length

Bespoke

Width

Bespoke

Height

Bespoke

Uniclass

Pr_65_67_78_72 Rectangular attenuatorsPrimary

CAWS

U90/480 Silencers

U90/480 Silencers

Specification data - Rectangular attenuators

Application

Airflow can be in either direction.

Manufacturer's standard.

High-temperature (H1).

Two hour/ 300°C.

High-pressure (C).

DW 144, class C.

Special construction.

Consult manufacturer for options and insert requirements (including all relevant properties below).

Refer to equipment schedule for details.

Performance standards

To ISO 7235.

Duty

-

Insertion loss

Manufacturer's standard.

Derived from tests carried out in accordance with ISO 7235 and may vary depending on installed conditions.

Consult manufacturer for further details.

Air volume

Consult manufacturer for details based on dimensions specified, or insert requirements and consult manufacturer for size(s) required to achieve this.

Permissible pressure loss

Manufacturer's standard.

Derived from tests carried out in accordance with ISO 7235 and may vary depending on installed conditions.

Consult manufacturer for further details.

Casing material

Pre-galvanized steel, standard.

Grade 316 stainless steel, standard.

Pre-galvanized steel, double skin.

Adds 50 mm to width and height.

Grade 316 stainless steel, double skin.

Adds 50 mm to width and height.

Lining material

Linings contain a sound-absorbent infill that is encapsulated with glass cloth and plain/ perforated steel.

Manufacturer's standard (vertical).

Horizontal arrangement.

Duct connections

Insert requirements or omit. Ass Accessories for related options.

Splitters

Splitters contain a sound-absorbent infill that is encapsulated with glass cloth and plain/ perforated steel.

Aerodynamic fairings at each end.

Manufacturer's standard (vertical).

Horizontal arrangement.

Markings

Consult manufacturer for options and insert requirements, or omit.

Lengths

Large attenuators will be of modular construction for ease of handling and may be split on the length, width and height. or combination thereof.

Insert requirements for each end of the model.

All models are made to order; consult manufacturer for details.

Width

Large attenuators will be of modular construction for ease of handling and may be split on the length, width and height. or combination thereof.

Manufacturing dimensional tolerance <1.0%.

Insert requirements. All models are made to order; consult manufacturer for details.

Note that double-skin linings add 50 mm to width and height.

Height

Large attenuators will be of modular construction for ease of handling and may be split on the length, width and height. or combination thereof.

Manufacturing dimensional tolerance <1.0%.

Insert requirements. All models are made to order; consult manufacturer for details.

Note that double-skin linings add 50 mm to width and height.

Flanges

30 mm profile flanges complying with DW 144 and DW/TM1.

Noise

Manufacturer's standard.

Flow noise derived from tests carried out in accordance with ISO 7235 and may vary depending on installed conditions.

Consult manufacturer for further details.

Accessories

None.

Protective paint finish (visible external metal surfaces).

Insert colour requirements.

Melinex encapsulated infill.

Other.

Supplied without support steelwork, brackets, fixings, gasket, mastic or other such items unless stated otherwise.

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