6
BORÅS
Tel +46 (0)33 - 23 67 80
STOCKHOLM
Tel +46 (0)8 - 54 55 12 70
Fire damper BSK9
EI90
200924.0001_ENG / Sept. 2021 teamfr
ont.se
Sound data
The speed is calculated on the damper’s gross area, i.e.
one BSK9 - 400 x 400 has a gross area of 0.16 m
2
.
The specified pressure drop applies to the damper without accessories.
Correction of sound power level, L
Wok
, in octave band
L
Wok
= L
W
+ K
ok
Correction, K
ok
75
Total pr
essur
e dr
op, Pa
Air speed, m/s
Sound power level
Technical data
1 Damper height < 400 mm
2 Damper height H ≥ 400 mm
Correction of sound power level, L
W
, for different
sizes use curves 1 - 2 according to:
L
W
= L
Wt
+ K
1
Damper height
mm
Damper area, m
2
< 400 acc. to 1
-
0,08
0,16
0,28
-
≥ 400 acc. to 2
0,08
0,16
0,32
0,64
1,28
K
1
-3
0
3
6
9
Opening
angle
Centre frequency Hz
63
125
250
500 1000 2000 4000 8000
90°
-1
-11
-18
-23
-26
-28
-32
-38
Tol. ± dB
1
2
3
4
6
6
6
6
