Smoke extraction blade damper ERK-MB
TECHNICAL DOCUMENTATION
|
Construction subject to change
No return possible
Stand: 2019-10-08 | Page 25
Correction factors
In the diagrams on previous pages (see pages 22 to 24), the
pressure loss Δp in Pa and the duct sound power level L
WA
in
dB(A) for the installation situation "Free intake" can be di-
rectly read via the required volumetric flow
𝑉
in m
3
/h.
Free intake
(Correction factor: not required, can be read directly in the diagrams)
Free outlet
(correction factor: 1.59)
Free outlet/Free intake
(correction factor: 2.91)
Figure 25 - Information regarding correction factor
Free cross-section FQ
min
[m²]
Table 7 - Free cross-section
For all other installation situations, the read result of the
pressure loss Δp in Pa must be multiplied by the following as-
signed factors, depending on the installation situation (with
𝑉
= constant).
The sound power level L
WA
in dB (A) is corrected using the cal-
culated pressure loss Δp in Pa via the diagram.
The density of the transferred medium air is ρ=1.2 kg/m
3
at 20 °C.
Duct connection on both sides
(correction factor: 0.68)
Free intake on the duct
(correction factor: 1.59)
Note:
Information regarding the free cross-section applies
to the smoke extraction blade damper without ta-
king into account the security grille which is
optionally available.
Width W [mm]
200
300
400
500
600
700
800
900 1000
Height H [mm
]
340
0.042 0.063 0.084 0.105 0.126 0.147 0.168 0.189 0.210
505
0.067 0.100 0.134 0.167 0.201 0.234 0.268 0.301 0.335
670
0.091 0.136 0.182 0.227 0.273 0.318 0.364 0.409 0.455
835
0.117 0.175 0.234 0.292 0.351 0.409 0.468 0.526 0.585
1000
0.141 0.211 0.282 0.352 0.423 0.493 0.564 0.634 0.705