16
DN 125, air discharge angle 360° (without deflector)
10
60
50
40
30
20
20
40
50 60
80
100
10
Pressure drop in Pa
Air flow rate in m³/h
4
9
A
12
15
70
90
30
6
2
A
Annular gap size in mm
1.
Determine the required annular gap
from the diagram subject to the inten-
ded pressure drop and air flow rate
for the section.
Example:
The design provides the following
details for the part section:
■ Supply air valve for ceiling installa-
tion: DN 125, air discharge angle
360°
■ Pressure drop: 20 Pa
■ Air flow rate: 52 m
3
/h
Annular gap to be set: 6 mm
2.
Set the determined annular gap
A
at
the supply air valve for setting into a
ceiling.
3.
Record the value in the commission-
ing report.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5608 999 GB
