Smoke extraction damper ERK-SO
TECHNICAL DOCUMENTATION
Technical data |
Construction subject to change
No
return
possible
Version:
2017-11-28
|
Page
29
TECHNICAL DATA
Pressure loss
∆
p
t
[Pa] and noise level L
WA
[dB (A)]
Diagram 1 - Design diagram
Correction table for octave weighting [dB/Oct]
f
m
[Hz]
63 125 250 500 1000 2000 4000 8000
KF
O
[dB]
-4 -2 0 -1 -4 -9 -15 -21
Sound power per octave (L
W
= L
WA
+ KF
O
)
f
m
[Hz]
63 125 250 500 1000 2000 4000 8000
L
W
[dB]
37 39 41 40 37 33 26 20
CALCULATION EXAMPLE
Given:
Solution from dimension table
W = 900 mm
FQ
min
= 0.247 m²
H = 400 mm
ζ
= 0.328
V = 6000 m³/h
Find:
Solution from diagram
∆
p
t
= ?
v
stirn
= 6.6 m/s
L
WA
= ?
∆
p
t
= 8.5 Pa
L
W
= ?
L
WA
= 39 dB (A)
ζ
[ ]
Δ
p
t
[Pa]
FQ
min
[m²]
V
stirn
[m/s]
