LR
p
Sound power level
[dB(A)]
L
W
A
100
125
160
200
30
35
25
40
50
15
20
45
Nominal size DN [mm]
v = 1.5 m/s
A
1
2.5
3.5
4
3
2
5
10
3
Pressure drop
p [Pa]
Volume flow V [m³/h]
20
50
100
200
300 400 500
80
30
40 50 60 70 80
20
30
40
700
5
10
100
3
Static pressure drop
]a
P[
p
S
Volume
flow
V [m³/h]
50
50
100
200
300
500
1000
200
300
2000
S
ound power level L
WA
[db(
A)]
10
0
125
160
20
0
Nominal size DN [mm]
v = 3 m/s
A
2
4
5
6
7
8
9
10
35
40
65
70
30
45
55
60
20
25
50
70
30
LR
p
s
Exhaust
air
User Manual 5.12 (2019-09) 5
Subject to change
Series FR92K
FR90 fire dampers
in short lengths
Dimensioning (2) pressure drop, sound power level with protective grilles connection
Installation on one side with ventilation duct connection and protective grille
Installation on both sides with protective grille in air transfer applications
free incoming flow -
exhaust air-
Installation on both sides with protective grille and non-return valve in air transfer applications
DN
Volume flow [m³/h] in the opening direction
at a differential pressure of
Leak tightness class according to
EN 1751 with closed non-return
valve and 25 to 300 Pa differential
pressure in the closing direction
25 Pa
50 Pa
160
110
250
≥
2
200
270
460
≥
2
