CLA

Compact sound attenuator for circular ducts

Air Distribution

Products › Air Distribution | Introduction Key Features Basic Operation Applications Dimensions

Compact sound attenuator for circular ducts

A rectangular sound attenuator with circular connection spigots. Unique properties regarding installation height, fire-resistance class, fibre-migration proof design and sound attenuation. Patent-pending self-supporting fibre-migration proof surface lining and end wall solution.

Key Features

Duct Sizes	4″, 5″, 6″, 8″, 10″ 12″ and 16″
Lengths	20″ and 40″

Basic Operation

The CLA sound attenuator offers the following advantages:

Extremely low installation height.
Very good sound attenuation
Fibre-migration proof
Airtightness class D
Low-pressure drop
Included in the MagiCAD database

Applications

Size	Length (mm)	⌀d (mm)	H (mm)	Static integral attenuation, db to ISO 7235								Weight (kg)
Size	Length (mm)	⌀d (mm)	H (mm)	63	125	250	500	1K	2K	4K	8K	Weight (kg)
100	500	99	152	7	9	14	26	34	42	35	26	3.2
	1000	99	152	7	17	26	44	50	50	50	39	6.0
125	500	124	177	5	9	13	21	29	35	31	20	3.9
	1000	124	177	7	16	23	39	50	50	47	35	7.2
160	500	159	212	5	8	13	17	23	31	21	17	5.0
	100	159	212	7	13	22	32	45	50	38	25	9.2
200	500	199	252	5	8	11	15	20	22	14	14	6.3
	1000	199	252	7	13	20	28	40	45	27	20	11.7
250	500	249	302	5	6	8	11	15	16	10	7	8.5
	1000	249	302	6	11	15	20	28	31	18	14	15.7
315	500	314	367	4	6	7	9	12	8	8	5	11.0
	1000	314	367	6	10	12	17	24	21	12	7	20.2
400	500	399	458	4	6	7	9	12	8	6	4	15.1
	1000	399	458	5	9	12	16	23	14	8	6	27.5

Dimensions

Size	B (mm)	C (mm)	⌀d (mm)	H (mm)	L
Size	B (mm)	C (mm)	⌀d (mm)	H (mm)	mm	mm
100	208	45	99	152	500	1000
125	236	45	124	177	500	1000
160	274	45	159	212	500	1000
200	321	45	199	252	500	1000
250	394	45	249	302	500	1000
315	462	45	314	367	500	1000
400	553	70	399	458	500	1000