150
400
500
1000
750
4500
1500
2000
3000
150
400
500
1000
750
4500
1500
2000
3000
0,01
0,10
1,00
1
10
A
L
(m
2
)
V
eff
(m/s)
Q
(m
3
/h
)
1,040
0,200
30
25
40
45
50
35
0,540
55
60
1
10
100
1000
1
10
∆
P (Pa
)
V
eff
(m/s)
k
p
L
wA
[dB(A)]
2
3
4
5
6
7
8
9
0,54
1,80
Fire damper FSD-B-U / FSD-A-U FLD-S-U /
FLD-S-UD. Technical data
Selection chart FSD-B-U / FSD-A-U FLD-S-U / FLD-S-UD
Selection example:
For the given duct dimensions and technical data, we select a 1200 x 200 mm FSD-B-U damper. We use the table on the
previous page to find the following data:
A
L
= 0,24 m
2
k
p
= 1,8
kdB(A)= -2
The technical data to achieve a flow rate of 3500 m
3
/h is required.
Referring to the diagram above using this flow rate and the area o 0,24 m
2
, we obtain a Veff of 4 m/s. With this veocity
and taking into account the value of kp, we obtain:
Differential pressure: 30 Pa
Sound pressure level: 45 dB(A)
Applying L
wA
- dB(A) = 45+ (-2) = 43 dB(A)
Series FSD-FLD
10
