SORDO-A

Sound attenuators for circular ducts

50 mm mineral wool
Galvanised sheet steel to Environmental Class C3
100 mm shorter
Air tightness class D
M1 classified
Built for a low CO2 footprint "EPD"
Excellent noise attenuation
Low pressure drop
Included in the MagiCAD database
Fire-resistance class EI30 to EI120*
** See the table for requisite safety distance*

Calculate with your requirements

SORDO-A is available in a RE:3 version. A RE:3 product is an alternative to our conventional products, systems and services, an alternative which is reduced, reused or revitalised. We ensure a notably lower level of embodied carbon, built-in CO2, and let these solutions wear our RE:3 symbol. Read more about RE:3 here.

Technical description

Design

Material and surface treatment

The standard SORDO-A is made of galvanised sheet steel to Environmental Class C3 (equivalent to M2 to VVS-AMA 98).

The SORDO is fibre-migration-proof thanks to our new patent-pending solution with self-supporting surface layer, which is approved with regard to cleaning, fibre migration, resistance to ageing, emissions, etc.

The connection spigots are fitted with rubber seal rings.

Sound attenuating material consisting of 50 mm thick mineral wool.

Installation, commissioning and maintenance

The product can be mounted by means of approved hangers that satisfy the provisions to load bearing capacity rating R corresponding to the fire resistance the structural element of the building, for example load bearing capacity rating R 60 for elements of structure to fire-resistance class EI60.

The connection spigots on this product are designed for connection to ducts only. It is important to drive screws or blind rivets into the sheet-metal edge on the connection spigot.

Dimension	Length	Static integral attenuation, dB to ISO 7235
(mm)	(mm)	63	125	250	500	1K	2K	4K	8K
100	500	5	7	12	24	37	45	35	24
100	800	6	10	19	32	45	50	45	27
100	1100	7	12	26	40	50	50	50	38
125	500	3	6	10	21	30	37	32	17
125	800	4	9	16	30	40	50	38	25
125	1100	5	12	21	39	50	50	44	33
160	500	3	5	10	17	25	32	17	14
160	800	4	8	15	25	35	42	28	20
160	1100	5	11	20	33	46	50	39	25
200	500	3	3	8	13	18	22	13	12
200	800	3	5	11	20	30	35	20	17
200	1100	4	7	15	27	42	48	27	19
250	500	2	2	5	10	16	15	8	6
250	800	2	4	8	15	23	24	12	9
250	1100	3	6	11	20	31	34	17	11
315	500	1	3	4	7	10	7	6	2
315	800	1	4	7	12	17	14	8	4
315	1100	2	5	9	17	25	21	10	6
400	500	1	3	3	7	10	7	5	3
400	800	1	3	5	11	15	10	6	3
400	1100	2	4	7	15	20	13	7	3

Nordic Swan listed

The product is listed in the database for building products that can be used in Nordic Swan Ecolabelled buildings.

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Include Accessory documents

Document	Article	Document type	Date
Environmental Product Declaration (pdf 836.98kB)	SORDO-A	Quality	09/12/2024
Sound attenuator for circular ducts (pdf 339.79kB)	SORDO-A	Technical catalogue	15/11/2024
Installation, Maintenance (pdf 132.46kB)	SORDO-A	IOM Manual	17/01/2024
Acoustics Overview (pdf 2.43MB)	CLA-A, CLA-B, SORDO-A, SORDO-B, SORDO-C, SORDO-P, SORDO-PF, CALMO, CADENZA, LARGO, LENTO, MORENDO, FACILE, ALD, CTM, CTK	Brochure	08/04/2023
M1 Certificate (pdf 167.9kB)	CLA-A; SORDO-A	Quality	12/05/2023
Building product declaration (pdf 50.46kB)	SORDO-A	Quality	24/05/2018
Type approval (pdf 143.15kB)	SORDO-A	Quality	14/11/2024

Whilst we have made every effort to ensure information on this website is up to date and accurate, the technical specification and availability of products/services listed on this website may vary market to market and are subject to change without notice. Please contact your regional representative or visit your local website for further details.