Lindab DRU - DIRU;DIRBU;DIRVU Pressure Drop Graphs; DIRU;DIRBU;DIRVU Flow Graphs for Balancing

20
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15 20 30 40 50 100
q
10
20
30
40
50
100
200
300
∆p
m
k
[m/s]
[l/s]
[Pa]
2345 10
v
1,5
2,0
2,5
3,0
3,5
4,0
4,5
5,0
5,5
6,0
Ø100
20
30
50
100
200
300
500
[Pa]
∆p
t
Ø100
10
820304050 120100
[l/s]
[m/s]
q
v
k
123451015
1,5 2,0
2,5 3,0 3,5 4,0
4,5
5,0
5,5
6,0
40
45
50
55
60
65
70
75
85
80
L
WA
[dB]
25 30 40 50 100 150
q
10
20
30
40
50
100
200
300
∆p
m
k
[m/s]
[l/s]
[Pa]
34510
v
1,5
2,0
3,0
4,0
5,0
6,0
7,0
8,0
9,0
10
Ø125
20
30
50
100
200
300
500
[Pa]
∆p
t
Ø125
15
12 20 30 40 50 180100
[l/s]
[m/s]
q
v
k
123451015
1,5 2,0
3,0 4,0 5,0
6,0
7,0
8,0
9,0
10,0
40
35
45
50
55
60
65
70
L
WA
[dB]
q
1510 20 30 40 50 60
10
20
30
40
50
100
200
300
v
11109876
5432
[Pa]
[l/s]
[m/s]
∆p
m
k
Ø80
1,5
1,0
2,0
2,5
3,0
3,5
4,0
20
30
50
100
200
300
500
[Pa]
∆p
t
Ø80
10
52030405075
[l/s]
[m/s]
q
v
k
123451015
1,51,0 2,0
2,5
3,0
3,5
4,0
40
35
45
50
55
60
65
70
75
80
85
90
L
WA
[dB]
Flow graphs for balancing
The balancing graphs show the flow as a function of the
measured pressure, ∆p
m
. These graphs should be used
to balance the system.
Pressure drop graphs with noise genera-
tion for dimensioning
The dimensioning graphs show the pressure drop over
the damper with flow meter, ∆p
t
. They should be used to
determine the pressure drop and to provide information
about sound power levels at different settings.
Damper with flow meter
DIRU, DIRBU, DIRVU