Installation, Mounting and Maintenance DISA-360
Construction subject to change.
No return possible!
Version:
Checking the primary volumetric flow
The supplied primary volumetric flow can be simply checked by
checking the static pressure with a Pa meter and the measuring
tube available from us as accessory.
To this end, one end of the measuring tube fitted with a rubber
cap is pressed against the air outlet of one of the nozzles at the
primary air plenum box (see drawing) and the other end is con-
nected to the hose connection of a Pa meter.
The values read on the meter and the following formula can be
used to to determine the volumetric flow:
V [l/s] = Primary air flow
Ps [Pa] = Static pressure
The K value is taken from the following table:
Air density::
ρ
= 1.2 kg/m
3
Δ
P [Pa] = Pressure loss / V
ZU
[m
3
/h] = Supply air volume
NL
(mm)
Nozzle configuration 600
1200
B
0,95
1,58
C
1,75
2,91
D
2,59
4,32
E
4,44
7,40
V
K Ps
=
The Pa meter is not included in the delivery.
Vzu (m
3
/h)
0 20 40 60 80 100
200
300
0
2
0
4
0
6
0
8
0
100
200
300
'
P (Pa.)
600-B
600-C
600-D
600-E
1200-C
1200-B
1200-D
1200-E
