Rectangular Horizontal Bend Duct Attenuator - Sound Attenuation
Verified by manufacturer 6 months ago
Rectangular horizontal bend duct sound attenuators, made to order.
Application
Sound attenuation.
Description
Rectangular horizontal 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 Guidance for specification option: Protective paint finish (optional; visible external metal surfaces only). |
Finish | Galvanized Natural Painted Guidance for specification option: Protective paint finish (optional; visible external metal surfaces). |
Material | Steel Stainless steel |
Shape | Rectangle |
Length | Bespoke |
Width | Bespoke |
Height | Bespoke |
Uniclass | |
CAWS | U90/480 Silencers U90/480 Silencers |
Specification data - Rectangular attenuators
Application | Manufacturer's standard.High-temperature (H1).Guidance for specification option: Two hour/ 300°C. High-pressure (C).Guidance for specification option: DW 144, class C. Special construction.Guidance for specification option: Consult manufacturer for options and insert requirements (including all relevant properties below). Refer to equipment schedule for details. Manufacturer guidanceAirflow can be in either direction. |
Performance standards | To ISO 7235. |
Duty | |
Insertion loss | Manufacturer's standard.Guidance for specification option: Derived from tests carried out in accordance with ISO 7235 and may vary depending on installed conditions. Consult manufacturer for further details. |
Air volume | Guidance for specification option: 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.Guidance for specification option: 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.Guidance for specification option: Adds 50 mm to width and height. Grade 316 stainless steel, double skin.Guidance for specification option: Adds 50 mm to width and height. |
Lining material | Manufacturer's standard (vertical).Horizontal arrangement.Manufacturer guidanceLinings contain a sound-absorbent infill that is encapsulated with glass cloth and plain/ perforated steel. |
Duct connections | Guidance for specification option: Insert requirements or omit. Ass Accessories for related options. |
Splitters | Manufacturer's standard (vertical).Horizontal arrangement.Manufacturer guidanceSplitters contain a sound-absorbent infill that is encapsulated with glass cloth and plain/ perforated steel. Aerodynamic fairings at each end. |
Markings | Guidance for specification option: Consult manufacturer for options and insert requirements, or omit. |
Lengths | Guidance for specification option: Insert requirements for each end of the model. All models are made to order; consult manufacturer for details. Manufacturer guidanceLarge attenuators will be of modular construction for ease of handling and may be split on the length, width and height. or combination thereof. |
Width | Guidance for specification option: Insert requirements. All models are made to order; consult manufacturer for details. Note that double-skin linings add 50 mm to width and height. Manufacturer guidanceLarge 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%. |
Height | Guidance for specification option: Insert requirements. All models are made to order; consult manufacturer for details. Note that double-skin linings add 50 mm to width and height. Manufacturer guidanceLarge 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%. |
Flanges | 30 mm profile flanges complying with DW 144 and DW/TM1. |
Noise | Manufacturer's standard. Guidance for specification option: 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). Guidance for specification option: Insert colour requirements. Melinex encapsulated infill. Other. Guidance for specification option: Supplied without support steelwork, brackets, fixings, gasket, mastic or other such items unless stated otherwise. |