RT QS

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Experts in Ventilation

Rectangular Duct Attenuators - RT / QS Series

Features

Q-Seal attenuators have an impervious seal between the acoustic fill and ambient air.
They are used when no possibility of fibre fly or ambient contamination of the acoustic fill is allowable.
Typical applications are as follows: -

- clean rooms
- operating theatres
- wet environments where attenuators are exposed to the elements
- kitchen exhaust systems
- applications where workers are sensitive to fibre exposure

Construction & Testing

The complete range of rectangular Q-Seal attenuators have been tested on the Q-Tech insertion loss test rig in full accordance with BS4718:1971.
It was found, during testing, that the performance of attenuators of standard construction but with an impervious membrane, was severely degraded.
To overcome the degradation and optimise performance, a unique combination of materials was developed to address the problem.
The result is a product that is fully supported by testing and, most importantly, with certified results that can be relied upon.

Performance

Tapered Splitters
		Static Insertion Loss, dB
	Length	Octave Gand Centre Frequency (Hz)								Module
Model RT...QS	mm	63	125	250	500	1k	2k	4k	8k	widths, mm
07A	600	3	5	10	18	20	18	12	9	275, 550, 825, 1100, 1375, 1650, 1925, 2200 Free Area 27%
07B	900	4	7	14	25	28	25	17	13
07C	1200	5	10	20	32	38	32	22	16
07D	1500	7	13	26	40	48	38	27	20
07E	1800	7	17	31	44	50	42	30	23
07F	2100	9	19	34	46	51	44	33	25
07G	2400	10	22	38	49	52	47	35	27
10A	600	3	5	9	15	17	14	10	8	300, 600, 900, 1200, 1500, 1800, 2100, 2400 Free Area 33%
10B	900	4	7	13	22	24	20	14	11
10C	1200	5	9	17	28	32	25	17	13
10D	1500	6	12	21	34	40	30	21	15
10E	1800	7	15	26	39	43	35	24	17
10F	2100	8	17	29	42	46	38	26	19
10G	2400	8	19	33	46	48	42	29	20
12A	600	3	4	8	14	14	12	8	7	325, 650, 975, 1300, 1625, 1950, 2275 Free Area 38%
12B	900	4	6	11	20	21	17	11	10
12C	1200	4	8	15	26	28	22	15	11
12D	1500	5	10	18	32	35	27	18	12
12E	1800	6	12	22	36	39	32	21	14
12F	2100	7	13	26	40	43	35	23	16
12G	2400	8	15	29	43	46	39	25	18
15A	600	2	3	7	13	13	10	7	6	350, 700, 1050, 1400 , 1750, 2100 Free Area 43%
15B	900	3	5	10	18	19	14	10	9
15C	1200	3	6	13	24	25	19	13	10
15D	1500	3	8	17	30	31	24	16	10
15E	1800	4	10	21	34	35	28	18	12
15F	2100	5	12	24	38	39	31	19	14
15G	2400	6	13	27	41	42	34	21	16
17A	600	2	3	6	11	12	9	6	5	375, 750, 1125, 1500, 1875, 250 Free Area 47%
17B	900	3	4	9	16	17	12	8	7
17C	1200	3	6	12	22	22	16	10	7
17D	1500	3	7	16	27	28	20	12	8
17E	1800	3	9	19	32	33	24	14	9
17F	2100	4	10	21	35	36	26	16	10
17G	2400	4	11	24	39	40	29	18	11
20A	600	1	3	6	10	10	7	5	4	400, 800, 1200, 1600, 2000, 2400 Free Area 50%
20B	900	2	4	9	15	15	10	7	6
20C	1200	2	5	12	20	19	14	8	6
20D	1500	2	6	15	26	23	18	8	7
20E	1800	3	8	18	30	28	21	11	8
20F	2100	3	9	20	34	32	23	13	9
20G	2400	3	10	22	37	36	25	15	10
22A	600	1	2	5	9	9	6	4	4	425, 850, 1275, 1700, 2125 Free Area 53%
22B	900	2	3	7	13	13	8	6	5
22C	1200	2	4	10	18	17	12	7	5
22D	1500	2	5	12	23	21	15	7	5
22E	1800	2	6	15	28	26	18	9	6
22F	2100	2	7	18	31	30	20	11	7
22G	2400	3	10	22	37	36	25	15	10
25A	600	1	2	5	8	8	5	3	3	450, 900, 350, 1800, 2250 Free Area 56%
25B	900	1	3	7	12	11	7	5	4
25C	1200	1	4	9	16	15	10	5	4
25D	1500	1	5	11	21	18	13	6	4
25E	1800	2	5	14	26	23	16	8	5
25F	2100	2	6	16	29	27	18	9	6
25G	2400	2	7	18	33	31	20	11	7

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