MANUAL IRS INSIDE DUCT SILENCER

2
Manual IRS Inside duct silencer
03-2017
Acoustic values
Size
Number of
openings
Hz
63
125 250 500 1K 2K 4K 8K
80 2 2.5 2 3 4.5 6 9 10 16
100 1 6.5 7.0 4.0 9.5 13 16 18 22
100 3 3.0 3.5 2.5 5.5 8.5 8.5 15 19
100 5 1.5 2.5 1.5 3.5 6.0 6.5 12 17
125 2 5.0 6.0 5.0 5.0 12 13 19 21
125 5 2.0 2.0 2.5 3.0 8.5 8.0 14 19
125 8 1.0 1.5 1.5 2.5 6.0 5.0 11 18
160 1 6.5 7.0 4.0 9.5 13 16 18 22
160 3 3.0 3.5 2.5 5.5 8.5 8.5 15 20
160 5 1.5 2.5 1.5 3.5 6.0 6.0 12 17
200 2 4.0 6.5 2.5 5.5 13 14 18 16
200 5 2.0 3.0 1.5 2.5 9.5 8.5 14 15
200 8 2.0 2.0 1.0 1.5 7.0 7.0 13 14
Sound attenuation
Sound attenuation without end refl ection
ISO 7235:2003
Table ΔL (dB)
Dimensions
S
Size ⌀D₁ ⌀D₂ S
80 80 82 50
100 100 102 50
125 125 127 50
160 160 162 50
200 200 202 50
⌀D1 = Diameter of the pipe
⌀D₂
B
A
B
A
A (mm) B (mm)
Intake air 50-350 250
Deduction air 0-50 250
⌀D1 = Diameter of the pipe
A = minimum distance between the
conduit opening and the fi rst IRS
B = minimum distance between two IRS
Installation
⌀D₂
⌀D₁
Conduit opening
To make the stated technical values asserted, it is necessary
that the values shown in the drawing are complied with.