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Circular sound attenuator in galvanized steel with insulation shell thickness of 50 or 100 mm enveloped in a glass film for air speeds up to 20 m / s
Attenuation values according to DIN EN ISO 7235 (63, 125, 250, 500, 1k, 2k, 4k, 8k [Hz])
Application
For noise reduction in round air ducts
Reducing noise produced by fans
Reducing flow noises from flow regulators or other channel components
Can be used as a damper to prevent sound transfer trough the ducting between rooms
Composition
Circular silencers are designed with an external galvanised duct system
Insulation with thickness 50 mm (SAR-G50) or 100 mm (SAR-G100)
Inner casing is made of perforated sheet steel
The void between the two is filled with sound-absorbing non-combustible mineral wool according to DIN4102 A2, specific mass> 20 kg / m³, building material class A2
Mineral wool certified according to RAL GZ 388
Connection to circular air ducts according to DIN EN 1506 or DIN EN 13180
Class D airtight connection with EPDM rubber according to DIN EN 12237
Airtight connection class D with EPDM rubber according to DIN EN 12237
Mounting
The attenuators should be mounted using duct suspension clamps, type OBMC, around the duct connection DN
Order example
SAR-G50 100 (200 mm) L=300mm
Explanation:
SAR-G = Type of sound attenuator
50 = Thickness of insulation in mm
100 = Connection diameter in mm
200 = Outer diameter (insulation shell included) in mm
300 = Length in mm
Articles
Article selection assistant
Type
Article number
Type
E-shop
I100882000601
FS SILVERTOP 06 - F7
I100882000602
FS SILVERTOP 06 - F9
I100882000603
FS SILVERTOP 06 - M5
I100882000801
FS SILVERTOP 08 - F7
I100882000802
FS SILVERTOP 08 - F9
I100882000803
FS SILVERTOP 08 - M5
I100882002301
FS SILVERTOP 23 - F7
I100882002302
FS SILVERTOP 23 - F9
I100882002303
FS SILVERTOP 23 - M5
I100882003501
FS SILVERTOP 35- F7
I100882003502
FS SILVERTOP 35 - F9
I100882003503
FS SILVERTOP 35 - M5
I100882005201
FS SILVERTOP 52 - F7
I100882005202
FS SILVERTOP 52 - F9
I100882005203
FS SILVERTOP 52 - M5
Sound attenuation values
I = 50 mm
[dB]
∆ PL [ζ / m]
DN
D [mm]
L [mm]
63 Hz
125 Hz
250 Hz
500 Hz
1000 Hz
2000 Hz
4000 Hz
8000 Hz
[kg]
80
180
300
4
6
5
13
15
16
12
15
1.7
0.374
80
180
600
4
9
13
26
30
32
25
24
2.9
80
180
900
4
11
22
39
45
48
37
33
4.1
80
180
1200
4
13
31
50
50
50
50
42
5.2
100
200
300
3
8
7
10
25
37
36
12
2
0.286
100
200
600
4
9
11
19
33
45
40
19
3.3
100
200
900
4
10
15
28
40
50
44
27
4.6
100
200
1200
4
10
20
37
48
50
48
34
5.9
125
224
300
3
4
7
11
15
14
16
11
2.3
0.22
125
224
600
4
6
10
19
28
33
25
18
3.8
125
224
900
4
9
14
27
42
50
35
24
5.3
125
224
1200
4
11
17
36
46
50
46
31
6.8
140
250
300
3
4
7
11
16
14
15
10
2.7
0.163
140
250
600
4
7
9
18
34
32
24
16
4.5
140
250
900
4
9
12
26
41
48
34
21
6.2
140
250
1200
5
12
20
44
50
50
50
27
8
150
250
300
2
3
6
11
16
14
15
9
2.7
0.176
150
250
600
3
6
9
17
30
29
24
13
4.5
150
250
900
4
7
12
25
38
44
32
17
6.2
150
250
1200
5
9
18
37
47
50
44
21
8
160
250
300
1
2
5
11
15
14
14
8
2.7
0.163
160
250
600
2
5
8
16
26
26
23
10
4.5
160
250
900
3
5
11
23
35
39
30
12
6.2
160
250
1200
4
6
15
30
44
50
38
14
7.9
180
280
300
1
2
5
11
13
12
12
8
3.1
0.14
180
280
600
1
4
8
16
24
23
18
10
5.1
180
280
900
3
5
11
21
33
35
23
12
7.1
180
280
1200
3
6
14
26
43
46
29
14
9
200
300
300
0
2
5
12
11
10
10
8
3.4
0.123
200
300
600
0
3
7
16
22
20
13
10
5.5
200
300
900
2
5
10
19
30
31
16
11
7.6
200
300
1200
2
6
12
22
42
41
20
13
9.8
224
315
300
1
2
4
10
11
9.5
7
6
3.8
0.108
224
315
600
1
3
7
15
21
18
11
8
6.4
224
315
900
2
4
10
18
28
26
15
10
8.9
224
315
1200
2
5
12
22
38
34
19
12
11.4
250
355
300
1
1
3
8
10
9
4
4
4.8
0.095
250
355
600
1
2
6
13
19
15
8
6
7.7
250
355
900
2
3
9
17
26
21
13
8
10.6
250
355
1200
2
4
12
21
34
27
17
10
13.5
280
400
300
1
1
3
7
9
7
3
3
5.5
0.081
280
400
600
1
2
6
12
18
14
8
5
8.9
280
400
900
2
3
9
16
25
20
12
7
12.2
280
400
1200
2
4
12
21
41
26
16
10
15.6
300
400
600
0
2
5
11
15
11
6
5
8.7
0.074
300
400
900
2
3
8
16
23
18
10
7
12
300
400
1200
2
4
10
21
34
24
15
10
15.3
315
400
600
0
1
4
10
12
7
4
4
9.2
0.069
315
400
900
1
2
6
15
21
15
8
7
12.6
315
400
1200
1
3
7
21
27
22
13
10
16
I = 100 mm
[dB]
∆ PL [ζ / m]
DN
D [mm]
L [mm]
63 Hz
125 Hz
250 Hz
500 Hz
1000 Hz
2000 Hz
4000 Hz
8000 Hz
[kg]
80
280
300
4
13
13
16
36
50
50
24
3.1
0.374
80
280
600
4
15
21
33
47
50
50
50
5.2
80
280
900
4
18
30
50
50
50
48
50
7.2
80
280
1200
5
20
39
50
50
50
50
50
9.2
100
300
300
3
12
14
22
33
48
44
21
3.5
0.286
100
300
600
4
14
18
29
39
50
48
46
5.7
100
300
900
5
17
23
36
46
50
50
50
7.9
100
300
1200
6
19
28
43
50
50
50
50
10.1
125
315
300
2
12
18
22
25
22
19
12
4
0.22
125
315
600
3
13
17
31
33
34
29
19
6.6
125
315
900
4
14
20
34
43
50
39
25
9.2
125
315
1200
5
14
21
37
50
50
50
32
11.9
140
355
300
2
10
15
21
22
20
18
11
4.8
0.163
140
355
600
3
11
15
29
35
33
29
17
7.9
140
355
900
4
13
19
32
41
49
41
23
11
140
355
1200
5
13
21
36
50
50
50
30
14
150
355
300
2
9
11
21
19
18
16
10
4.8
0.176
150
355
600
3
10
14
26
28
31
30
15
7.9
150
355
900
4
11
17
30
39
49
43
19
10.9
150
355
1200
5
12
20
39
50
50
50
22
14
160
355
300
2
7
8
20
16
16
15
9
4.8
0.163
160
355
600
3
8
12
24
26
30
30
10
7.9
160
355
900
4
10
16
28
37
48
45
13
10.9
160
355
1200
5
11
19
33
47
50
50
16
14
180
400
300
2
6
8
20
14
15
14
9
5.6
0.14
180
400
600
3
8
12
21
25
26
22
11
9.2
180
400
900
4
10
16
26
38
42
31
13
12.7
180
400
1200
5
12
19
30
47
50
39
19
16.3
200
400
300
1
5
7
19
12
14
12
9
5.6
0.123
200
400
600
2
7
11
17
23
22
14
11
9.1
200
400
900
3
9
15
23
32
35
17
13
12.6
200
400
1200
4
12
18
26
46
45
28
22
16.2
224
400
300
1
5
7
14
12
12
9
8
5.6
0.108
224
400
600
3
6
11
17
22
19
12
9
9
224
400
900
4
8
15
24
36
30
16
12
12.5
224
400
1200
5
10
18
29
46
36
23
18
16
250
450
300
1
4
6
8
12
10
5
4
6.6
0.095
250
450
600
3
5
10
16
20
16
9
7
10.7
250
450
900
4
6
14
24
30
24
14
10
14.7
250
450
1200
5
7
17
31
45
32
18
13
18.8
280
500
600
3
5
10
15
19
15
9
7
12.2
0.081
280
500
900
3
6
14
23
28
23
13
10
16.9
280
500
1200
4
7
17
30
44
31
17
13
21.5
300
500
600
2
4
10
13
18
15
8
6
12.1
0.074
300
500
900
3
5
13
21
27
22
12
9
16.7
300
500
1200
4
7
17
28
37
29
16
12
21.2
315
500
600
2
4
10
12
17
14
8
6
12.8
0.069
315
500
900
2
5
13
20
25
21
11
9
17.4
315
500
1200
3
7
17
27
33
28
15
12
22.1
355
560
600
1
3
9
11
12
7
5
4
15
0.061
355
560
900
2
5
11
16
19
14
8
7
20.4
355
560
1200
3
6
14
22
26
20
11
9.5
25.7
400
600
600
1
4
10
12
14
7
6
5
16.2
0.052
400
600
900
2
5
12
19
20
14
8
8
22
400
600
1200
3
6
13
23
27
18
11
10
27.8
450
630
600
1
4
8
12
14
7
5
5
19.1
0.048
450
630
900
2
5
11
16
16
8
6
5
26.3
450
630
1200
3
6
12
21
23
13
8
8
33.4
500
710
600
1
4
6
12
13
6
4
4
22.8
0.039
500
710
900
3
6
12
20
18
8
6
5
31.1
500
710
1200
3
7
12
23
25
11
8
7
39.4
560
800
600
1
3
7
13
11
5
4
4
26.6
0.034
560
800
900
3
5
11
20
15
7
5
4
36.3
560
800
1200
3
6
11
20
18
8
6
5
46
600
800
900
3
4
9
17
10
5
4
4
35.2
0.031
600
800
1200
3
4
11
20
15
6
5
4
44.6
630
800
900
2
3
8
16
6
3
3
3
38
0.03
630
800
1200
2
3
10
19
10
4
3
3
47.6
710
900
900
2
3
9
13
5
2
3
2
44.5
0.029
710
900
1200
2
3
10
17
9
3
3
3
55.6
800
1000
1200
3
3
10
15
7
3
3
4
70
0.023
I = Insulation jacket thickness in mm
DN = Nominal connection diameter of silencer in mm
D = Outside diameter in mm
L = Length in mm
Δ Ptot = Δ PL x [(ρ x v²) / 2] x L
Δ Ptot = Total pressure loss in Pascal
Δ PL = Average total pressure loss coefficient ζ/m