Rectangular Duct Attenuator with Circular Spigots - Sound Attenuation
Verified by manufacturer 6 months ago
Rectangular duct sound attenuators with circular spigots, made to order.
Application
Sound attenuation.
Description
Rectangular duct sound attenuators with circular spigots.
Features and benefits:
- Made to order.
- Constructed in accordance with DW 144 specification for medium pressure (Class B) ductwork.
- 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. In model SP these also form central elements.
- 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.
- Excessively large or heavy attenuators may be manufactured in mating sections for ease of handling.
- 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 | 600 mm 900 mm 1200 mm 1500 mm 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.Pre-galvanized 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. |
Length | 600 mm. Guidance for specification option: Standard. 900 mm. Guidance for specification option: Standard. 1200 mm. Guidance for specification option: Standard. 1500 mm. Guidance for specification option: Standard. Other. Guidance for specification option: Non-standard attenuators are available; consult manufacturer for options and insert requirements. Manufacturer guidanceExcessively large or heavy attenuators may be manufactured in mating sections for ease of handling. |
Width | Guidance for specification option: Insert requirements, any width >149 mm. Note that double-skin linings add 50 mm to width and height. Manufacturer guidanceExcessively large or heavy attenuators may be manufactured in mating sections for ease of handling. Manufacturing dimensional tolerance <1.0%. |
Height | Guidance for specification option: Insert requirements, any height >99 mm. Note that double-skin linings add 50 mm to width and height. Manufacturer guidanceExcessively large or heavy attenuators may be manufactured in mating sections for ease of handling. Manufacturing dimensional tolerance <1.0%. |
Flanges | Male spigots, 100 mm diameter. Guidance for specification option: Standard. Male spigots, 125 mm diameter. Guidance for specification option: Standard. Male spigots, 150 mm diameter. Guidance for specification option: Standard. Male spigots, 160 mm diameter. Guidance for specification option: Standard. Male spigots, 180 mm diameter. Guidance for specification option: Standard. Manufacturer guidanceAll spigots include integral seals as standard. |
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. |