Installation, Mounting and Maintenance DISA-W
Z11/27 - 10
Construction subject to change.
No return possible!
20.10.2015
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
Nozzle configuration A
Nozzle configuration B
NL
(mm)
Nozzle config-
uration
900 1200 1500 1800 2100 2400 2700 3000
?A
0,42 0,62 0,79 0,99 1,16 1,32 1,51 1,69
B
0,71 1,06 1,35 1,69 1,98 2,27 2,59 2,90
C
1,32 1,96 2,50 3,14 3,68 4,21 4,80 5,39
D
1,97 2,92 3,72 4,67 5,48 6,28 7,15 8,03
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
20
40
60
80
100
200
300
'
P (Pa.)
900-A 1200-A 1500-A 1800-A 2100-A 2400-A 2700-A 3000-A
900-B
1200-B
1500-B
1800-B
2100-B
2400-B
2700-B
3000-B
Vzu (m
3
/h)
0 20 40 60 80 100
200
300
0
20
40
60
80
100
200
300
'
P (Pa.)
