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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