Catalogue Swirl diffusers
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Selection diagram for DLA 7 with DEU (flow restrictor), model 400, spigot 199 mm (tangential setting)
X
N
S
S
N
\
\
N
\^
s.
N
\
X
a(cmax)[m] 5 4
1,5
0,5
3
2
1
200
Ap[Pa]
100 80
60
50 40
30 25
20 15
10
8
6
[m3/h]
4
*
Jr
-
-
-
-
30 20 10 30 20 10
30 20 10
H
> 4 m
At
[K]
-12
h =
1,8 m
-8
■__
-6
~--■
—__
T
H =
3,5m
At
[K] -12__
___ ^
h =
1,8m
-8
-4 ■--
~ —
At
[K]
-12
H
= 3..
2,75 m
-10
h =
1,8m
-6
- — _
__
—.
^_—
100 150 200 250 300 350 400 500 V
stated acoustics at tangential setting 1
exhaust with diffusing element + 8 dB
air mode 90° without diffusing element - 12 dB
Legend
[m3/h]
[°C]
[°C]
V = volume flow tzu = supply air temperature tRA = room air temperature
Note:
The stated LwA-values are valid for the tangential setting 1. With the vertical setting, the level is 2 dB lower, with the tangential setting 2 the level is 12 dB higher.
At = temperature difference between
supply air and room air [K]
Ap = pressure loss [Pa]
Lwa = sound power level [dB(A)]
a(cmax)= spread at which the maximum
speed of the jet air
has been measured [m]
cmax = maximum speed of jet air
with uniformly distributed
heat loads [cm/s]
H = installation height [m]
Model
400
recommended volume flow
V [m3/h]
220
recom. height of diffused air
H[m]
2.5...5.0
recom. distance between two diffusers (distance to wall a/2)
a [m]
3.0...3.5
Selection example see page 9
LTG Aktiengesellschaft • Grenzstraße 7 • D-70435 Stuttgart • a +49 (0711) 8201-180 • Fax -720 DLA7/DLA8-E-TP (12/02)
Internet: http://www.LTG-AG.de • E-Mail: info@LTG-AG.de • Printed in Germany • Ausgaben mit früherem
Datum werden hiermit ungültig • Technische Änderungen vorbehalten • Former editions are invalid • Subject to technical modifications. 7
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