Schako VLV55, Technical Documentation Manual

Page: 15 / 31

VLV55|VLV65 - Volumetric flow controller
TECHNICAL DOCUMENTATION
VLV65 - Radiated noise - relative sound spectrum |
Construction subject to change
No return possible Version: 2017-04-24 | Page 15
VLV65 - RADIATED NOISE - RELATIVE SOUND SPECTRUM
NW100
Relative sound spectrum (dB)
Correction value K
L
Frequency (Hz)
Hz 63 125 250 500 1000 2000 4000 8000
K
L
1 0 -8 -6 -5 -5 -10 -13
NW125
Relative sound spectrum (dB)
Correction value K
L
Frequency (Hz)
Hz 63 125 250 500 1000 2000 4000 8000
K
L
2 1 -5 -2 -8 -7 -9 -12
Size 160
Relative sound spectrum (dB)
Correction value K
L
Frequency (Hz)
Hz 63 125 250 500 1000 2000 4000 8000
K
L
0 -1 -6 -4 -7 -7 -8 -10
NW200
Relative sound spectrum (dB)
Correction value K
L
Frequency (Hz)
Hz 63 125 250 500 1000 2000 4000 8000
K
L
0 -2 -6 -4 -7 -7 -7 -11
NW250
Relative sound spectrum (dB)
Correction value K
L
Frequency (Hz)
Hz 63 125 250 500 1000 2000 4000 8000
K
L
-1 -2 -5 -6 -9 -6 -7 -12
Size 315
Relative sound spectrum (dB)
Correction value K
L
Frequency (Hz)
Hz 63 125 250 500 1000 2000 4000 8000
K
L
0 -2 -2 -6 -8 -6 -7 -19
Differential pressure range: 0-300 Pa
Air velocity: 0.5 – 5.0 m/s
K
L
= correction value; relative sound power level, relative to L
WA
K
LW
= L
WA
+ {K
L
}
C A L C U L A T I O N E X A M P L E
VLV65 design data
NW 200 mm | V=545 m³/h |
p=100 Pa | L
WA
= 38 dB(A)
Hz 63 125 250 500 1000 2000 4000 8000
K
L
0 -2 -6 -4 -7 -7 -7 -11
Sound values calculated according to formula
K
LW(relativ)
= L
WA
+ {K
L
}
gives
Hz 63 125 250 500 1000 2000 4000 8000
L
WA
38 38 38 38 38 38 38 38
K
L
0 -2 -6 -4 -7 -7 -7 -11
K
LW
38 36 32 34 31 31 31 27