User Manual 5.1-1 (2018-09) 9
Subject to change
Series FK92K
100
200
300
400
600
800
Width [mm]
Height H [mm]
125
100
150
175
200
225
250
100
150
175
225
250
Height H [mm]
200
1000
2000
3000
5000
7000
40
30
20
50
Sound power level L [dB(A)]
WA
300
500
Volu
me f
low V
[m³/h]
150
200
5
6
7
8
4
9
Flow velocity v
[m/s]
A
11
10
12
4000
6000
125
700
1500
60
500
700
250
150
FK90K fire dampers
Dimensioning (2)
Sound power level with ventilation duct connection on both sides
Octave mid frequency [Hz]
Relative sound power level
Relative sound power level
D
L
Example:
V
= 1500 m³/h
B
=
400 mm
H
=
225 mm
A
A
=
0.09 m²
A
free
= 0.082 m²
D
p
s
=
2.7 Pa
v
A
=
4.6 m/s
L
WA
=
27 dB(A)
Sound power level
L
W-Oct
for the octave mid frequencies
f
[Hz]
63 125 250 500 1000 2000 4000 8000
L
WA
[dB(A)] 27 27 27 27 27
27
27
27
D
L
4.6 m/s
[dB]
11
9
3
-2 -8
-15 -24 -28
L
W-Oct
[dB]
38 36 30 25 19
12
3
-
Flow velocity v
A
[m/s]
v
A
[m/s]
