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Inlet Systems |
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| Acoustic Louvres |
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Series 7000 Type 7010
Series 7000 Type 7020
Series 7000 Type 7030
Series 7000 Type 7040 |
Series 7000 - Type 7010
The Robertson Acoustic Louvre Type 7010 is a factory assembled, medium performance, half chevron louvre. The following are noise reduction levels (in dB) recorded during testing.
Series 7000 - Type 7020
The Robertson Acoustic Louvre Type 7020 is a factory assembled, medium performance, full chevron louvre. The following are noise reduction levels (in dB) recorded during testing. |
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Typical Cross Section
Type 7010 |
Typical Cross Section
Type
7020 | |
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Standard Height |
|
No of Intermediate
Blades |
Types 7010 & 7020 |
|
*2 |
590 |
|
3 |
740 |
|
4 |
890 |
|
5 |
1040 |
|
6 |
1190 |
|
7 |
1340 |
|
8 |
1490 |
|
9 |
1640 |
|
10 |
1790 |
|
11 |
1940 |
|
12 |
2090 |
|
13 |
2240 |
|
14 |
2390 |
|
15 |
2540 |
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* Denotes minimum dimensional limitation |
| NOTE: Standard heights shown give maximum free inlet area, however louvres can be manufactured to suit any opening dimension. | |
|
Frequency
(Hz) |
Noise reduction (dB) |
|
Type 7010 |
Type 7020 |
|
63 |
8.5 |
9.5 |
|
125 |
11.5 |
11.5 |
|
250 |
10 |
16.5 |
|
500 |
14.5 |
21.5 |
|
1K |
21 |
39 |
|
2K |
23.5 |
35.5 |
|
4K |
24 |
38 |
| NOTE: Tests were carried out in accordance with ASTM E336-67T, Section A2.3 Test Procedure for Measuring Transmission Loss in Non-Laboratory Type Configuration. The field transmission loss is determined as specified in Section A2.3 E.336, and is defined as follows: FTL = NR - 6. |
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Acoustic Inlet Louvres
Newport Power Station, Australia | |
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Series 7000 - Type 7030
The Robertson Acoustic Louvre Type 7030 is a factory or site assembled, medium to high performance, half chevron louvre. The following are noise reduction levels (in dB) recorded during testing.
Series 7000 - Type 7040
The Robertson Acoustic Louvre Type 7040 is a factory or site assembled, high performance, half chevron louvre. The following are noise reduction levels (in dB) recorded during testing.
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Typical Cross Section
Type 7030 |
Typical Cross Section
Type
7040 | |
|
Frequency
(Hz) |
Noise reduction (dB) |
|
Type 7030 |
Type 7040 |
|
63 |
8 |
12.5 |
|
125 |
15.5 |
24 |
|
250 |
18 |
24 |
|
500 |
26 |
31.5 |
|
1K |
35.5 |
36.5 |
|
2K |
37 |
39.5 |
|
4K |
33 |
34 |
NOTE: Tests were carried out in accordance with ASTM E336-67T, Section A2.3 Test Procedure for Measuring Transmission Loss in Non-Laboratory Type Configuration. The field transmission loss is determined as specified in Section A2.3 E.336, and is defined as follows:
FTL=NR-6. | |
|
Standard Height |
|
No of Intermediate
Blades |
Type 7030 |
Type 7040 |
|
*2 |
1730 |
1172 |
|
3 |
2030 |
1507 |
|
4 |
2330 |
1846 |
|
5 |
2630 |
2183 |
|
6 |
2930 |
2520 |
|
7 |
3230 |
2857 |
|
* Denotes minimum dimensional limitation |
| NOTE: Standard heights shown give maximum free inlet area, however louvres can be manufactured to suit any opening dimension. | |
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| Contact your nearest RVI service centre for performance details and technical advice. |
