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Circular sound attenuator with baffle, duct in galvanized steel with insulation thickness of 100 mm sheathed in a dust cover 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
Advantage
The silencer with baffle type SAR-GB has a higher attenuation than the classic round silencer.
Composition
Circular silencers are designed with an external galvanised duct system
Insulation with thickness 100 mm (SAR-GB100)
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-GB100 315 L=600mm
Explanation:
SAR-GB = Type of sound attenuator with internal baffle
100 = Thickness of insulation in mm
315 = Connection diameter in mm
600 = Length in mm
Sound attenuation values
I = 100 mm
SAR-GB 100
[dB]
DN
D [mm]
L [mm]
63 Hz
125 Hz
250 Hz
500 Hz
1000 Hz
2000 Hz
4000 Hz
8000 Hz
[kg]
315
500
600
3
6
13
20
25
22
17
15
16
315
500
900
5
9
17
26
42
37
25
20
23
315
500
1200
5
10
22
34
52
51
32
24
30
355
560
600
3
5
10
16
27
24
16
12
17
355
560
900
5
8
16
25
41
36
24
19
26
355
560
1200
5
9
21
33
51
50
31
23
34
400
600
600
3
4
9
16
20
14
10
10
20
400
600
900
5
6
14
24
31
22
15
15
31
400
600
1200
5
8
16
30
42
32
21
18
42
450
630
900
4
5
13
23
30
21
14
14
35
450
630
1200
4
7
15
29
41
31
20
17
47
500
710
900
4
5
12
20
23
15
11
12
40
500
710
1200
4
6
14
27
34
21
14
15
53
560
800
1200
3
5
13
26
33
20
13
14
59
630
800
1200
3
4
11
23
24
14
11
12
63
710
900
1200
2
4
11
21
17
11
10
10
71
800
1000
1200
2
3
10
20
16
10
9
9
82
I = Insulation jacket thickness in mm
DN = Nominal connection diameter of silencer in mm
D = Outside diameter in mm
L = Length in mm
Pressure loss
ΔPt (Pa/m)
DN
Q (m³/h)
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
12000
13000
14000
315
13
50
100
355
8
23
48
70
101
400
3
9
22
48
58
80
100
450
6
12
20
30
43
58
72
87
101
500
3
7
11
18
25
33
43
52
65
78
95
560
4
7
11
15
21
26
33
40
49
60
66
77
630
6
8
11
14
18
22
27
32
37
41
50
710
4
6
8
10
12
14
17
20
24
800
5
6
7
8
9
12
ΔPt = Total pressure loss in Pa / m
DN = Nominal connection diameter of the silencer in mm