User Manual 5.1-1 (2018-09) 11
Subject to change
Series FK92K
FK90K fire dampers
Dimensioning (4)
Sound power level with ventilation duct connection on one side, and free incoming flow with protective grille
200
300
400
600
800
Width [mm]
Height H [mm]
125
100
150
175
200
225
250
250
225
200
175
125
100
Height H [mm]
150
1000
2000
3000
4000
5000
Sound power level L [dB(A)]
WA
300
500
Volu
me f
low
V [m³/h]
150
200
5
6
7
8
2.5
4
9
Flow velocity
v
[m/s]
A
11
10
12
700
100
3
150
250
500
700
0
4
0
2
0
6
0
5
0
3
Octave mid frequency [Hz]
Relative sound power level
Example:
V = 500 m³/h
B = 200 mm
H = 225 mm
A
A
= 0.045 m²
A
free
= 0.041 m², or 0.036 m² with protective grille
D
p
s
=
4.9 Pa
v
A
=
3.1 m/s
L
WA
=
22 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)] 22 22 22 22 22
22
22
22
D
L
3.1 m/s
[dB]
16
6
2
-2 -6
-18 -25 -20
L
W-Oct
[dB]
38 28 24 20 16
4
-
2
Relative sound power level
D
L
Flow velocity v
A
[m/s]
v
A
[m/s]
