Applications
Silencer is applied for noise absorption produced during the ventilating equipment operation and spread along the ducting systems. Suitable for installation into round ducts. The silencer reduces the noise level in the air duct significantly (refer the diagram «Noise level reduction»). The silencer is applied jointly with the sound-insulated fan in case of low-noise requirements not only to the air duct but to the equipment altogether.
Design
SRF silencer casing consists of internal and external aluminium-alloy spiral seam tubes filled with flameproof sound insulating material. The casing external surface is perforated and has the protecting cover to prevent the fiber blowing-out. The minimum bending radius of the silencer is up to 2 diameters. Each standards size has several length modifications.
Mounting
The silencer design allows fixing it on the round ducts in any position by means of clamps. The linear mounting is preferable for to attain the better effect. To prevent the flexible silencer sagging it should be fixed not only at the ends but in the middle.
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|
|
Noise level reduction, dB (Octave-frequency band [Hz]) |
|---|
|
|
|
63 Hz |
|
125 Hz |
|
250 Hz |
|
500 Hz |
|
1000 Hz |
|
2000 Hz |
|
4000 Hz |
|
8000 Hz |
|
SRF 100/600 |
|
6 |
|
8 |
|
13 |
|
22 |
|
28 |
|
34 |
|
17 |
|
20 |
|
SRF 100/900 |
|
8 |
|
10 |
|
15 |
|
25 |
|
33 |
|
40 |
|
21 |
|
23 |
|
SRF 100/2000 |
|
10 |
|
15 |
|
24 |
|
48 |
|
53 |
|
51 |
|
39 |
|
36 |
|
SRF 125/600 |
|
4 |
|
7 |
|
14 |
|
20 |
|
31 |
|
31 |
|
13 |
|
12 |
|
SRF 125/900 |
|
5 |
|
9 |
|
16 |
|
23 |
|
36 |
|
37 |
|
17 |
|
16 |
|
SRF 125/2000 |
|
7 |
|
15 |
|
23 |
|
47 |
|
55 |
|
50 |
|
28 |
|
25 |
|
SRF 150/600 |
|
3 |
|
7 |
|
12 |
|
32 |
|
40 |
|
40 |
|
19 |
|
20 |
|
SRF 150/900 |
|
4 |
|
8 |
|
14 |
|
40 |
|
48 |
|
49 |
|
26 |
|
25 |
|
SRF 150/2000 |
|
5 |
|
10 |
|
21 |
|
42 |
|
50 |
|
48 |
|
26 |
|
25 |
|
SRF 160/600 |
|
3 |
|
7 |
|
12 |
|
20 |
|
25 |
|
24 |
|
10 |
|
12 |
|
SRF 160/900 |
|
3 |
|
8 |
|
13 |
|
21 |
|
28 |
|
28 |
|
13 |
|
16 |
|
SRF 160/2000 |
|
5 |
|
11 |
|
20 |
|
40 |
|
48 |
|
48 |
|
25 |
|
25 |
|
SRF 200/600 |
|
2 |
|
5 |
|
12 |
|
20 |
|
26 |
|
21 |
|
10 |
|
10 |
|
SRF 200/900 |
|
3 |
|
6 |
|
12 |
|
22 |
|
28 |
|
24 |
|
12 |
|
13 |
|
SRF 200/2000 |
|
4 |
|
11 |
|
22 |
|
42 |
|
51 |
|
34 |
|
19 |
|
23 |
|
SRF 250/600 |
|
2 |
|
3 |
|
8 |
|
16 |
|
22 |
|
13 |
|
10 |
|
10 |
|
SRF 250/900 |
|
2 |
|
4 |
|
9 |
|
18 |
|
25 |
|
16 |
|
11 |
|
12 |
|
SRF 250/2000 |
|
3 |
|
6 |
|
16 |
|
30 |
|
39 |
|
27 |
|
17 |
|
22 |
|
SRF 315/600 |
|
2 |
|
4 |
|
9 |
|
18 |
|
21 |
|
12 |
|
7 |
|
9 |
|
SRF 315/900 |
|
2 |
|
5 |
|
11 |
|
21 |
|
24 |
|
14 |
|
8 |
|
10 |
|
SRF 315/2000 |
|
4 |
|
7 |
|
17 |
|
34 |
|
39 |
|
24 |
|
14 |
|
18 |
Application of silencer in ventilating exhaust system