Multiflow Attenuators - MFB / SIL Series
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   |
 Features
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- Silencer overall length includes a 300mm long plenum section which should be fitted to the fan flange when silencers/fans are coupled.
- This aids the airflow entering/exiting the fan unit and minimises flow disturbance and losses.
- Alternative silencer lengths are available to special order, together with Melinex lining to baffles.
- The illustrated insertion losses will vary under such cases - please consult Elta Fans.
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 Construction
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- The units are rigidly constructed and consist of a galvanised sheet metal casing containing a series of centre and side splitters.
- End flanges are of the Ductmate type to allow easy fixing to the Multiflow Series, of fans and ductwork.
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 Dimensions
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 |
| |
Model
MFB ..SIL |
A |
B |
C |
DØ |
E |
Ductmate
Flange size |
Kg |
| 350 |
350 |
400 |
1200 |
9 |
375 |
25 |
24 |
| 400 |
400 |
450 |
1200 |
9 |
425 |
25 |
31 |
| 450 |
450 |
500 |
1200 |
9 |
475 |
25 |
38 |
| 500 |
500 |
550 |
1200 |
9 |
525 |
25 |
42 |
| 550 |
550 |
620 |
1200 |
11 |
585 |
35 |
49 |
| 650 |
650 |
720 |
1500 |
11 |
685 |
35 |
74 |
| 700 |
700 |
770 |
1500 |
11 |
735 |
35
|
81 |
|
 Performance
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- Performance data is based on an adaptation of the standard Q-Tech Rectangular attenuator range.
- Refer to pages G-6/10 for further information.
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 Sound Data
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| |
Static Insertion Loss, dB |
| Model |
Octave Band Centre Frequency (Hz) |
| MFB..SIL |
63 |
125 |
250 |
500 |
1k |
2k |
4k |
8k |
| 350 |
4 |
6 |
14 |
23 |
30 |
29 |
20 |
14 |
| 400 |
4 |
6 |
14 |
23 |
30 |
29 |
20 |
14 |
| 450 |
4 |
9 |
13 |
25 |
31 |
30 |
22 |
15 |
| 500 |
4 |
9 |
14 |
24 |
30 |
30 |
23 |
16 |
| 550 |
4 |
6 |
11 |
22 |
28 |
27 |
18 |
14 |
| 650 |
4 |
7 |
13 |
24 |
26 |
25 |
17 |
12 |
| 700 |
4 |
7 |
13 |
24 |
26 |
25 |
17 |
12 |
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