6
Pressure
[Pa]
Air flow [l/s]
300
10
12
14
16 18 20
22
24
26
30
32
34
36
38
40 45 50 55 60 65
28
200
100
150
90
80
70
60
50
4
5
6
7
8
9
10
15
20
25
30
35
40
45 50
60
70
80 90 100
Number open Nozzles
Service & Maintenance Fasadium
Lindab reserves the right to make changes without prior notice
2022-09-30
Lindab reserves the right to make changes without prior notice
2022-09-30
lindab | for a better climate
2.2.2 Calculating the airflow
– After measuring the static nozzle pressure, calculate the air flow per nozzle:
q=0.0622∙√P
q = air flow per nozzle
P = static nozzle pressure
– After finding the air flow per nozzle, find the needed number of open nozzles:
q
tot
/q=n
open
q
tot
= total air flow
n
open
= open nozzles
– Alternatively, read off the needed number of nozzles in the diagram below.
