Circular Duct Attenuator - Sound Attenuation
Verified by manufacturer 21 days ago
Circular duct sound attenuators, made to order.
Application
Sound attenuation.
Description
Circular duct sound attenuators.
Features and benefits:
- Made to order.
- 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.
- Fitted with male spigots with integral seals.
- Sound absorbent infill is encapsulated with glass cloth and perforated steel.
- Central pods (type PLP) 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 | Circle |
Length | 600 mm 900 mm 1200 mm 1500 mm 1800 mm |
Width | 100 mm 125 mm 150 mm 160 mm 180 mm |
Height | Bespoke Guidance for specification option: Any width >99 mm |
Uniclass | |
CAWS | U90/480 Silencers U90/480 Silencers |
Specification data - Circular 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. |
Lining material | Sound-absorbent infill encapsulated with glass cloth and plain/ perforated steel.. |
Duct connections | Guidance for specification option: Insert requirements or omit. Ass Accessories for related options. |
Markings | Guidance for specification option: Consult manufacturer for options and insert requirements, or omit. |
Configuration | Without pod (model PL). With pod (model PLP). |
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. 1800 mm. Guidance for specification option: Standard. Manufacturer guidanceNominal casing length, excluding spigots. Excessively large or heavy attenuators may be manufactured in mating sections for ease of handling. |
Diameter | 100 mm. Guidance for specification option: Nominal diameter. Outer diameter: 210 mm. 125 mm. Guidance for specification option: Nominal diameter. Outer diameter: 235 mm. 150 mm. Guidance for specification option: Nominal diameter. Outer diameter: 260 mm. 160 mm. Guidance for specification option: Nominal diameter. Outer diameter: 270 mm. 180 mm. Guidance for specification option: Nominal diameter. Outer diameter: 290 mm. Manufacturer guidanceExcessively large or heavy attenuators may be manufactured in mating sections for ease of handling. Manufacturing dimensional tolerance <1.0%. |
Flanges | 40 mm long circular spigot connections. |
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. |