VLV55|VLV65 - Volumetric flow controller
TECHNICAL DOCUMENTATION
Prior to assembly and commissioning | Legend
Construction subject to change
No return possible
Version: 2017-04-24 | Page 29
PRIOR TO ASSEMBLY AND COMMISSIONING
An instruction leaflet containing
information on safety, transport dis-
posal, installation
commissioning and maintenance is
enclosed with each SCHAKO prod-
uct.
For safety reasons, this instruction
leaflet must
e read under all circumstances and
completely adhered to.
These devices are NOT suitable for use in zones where there is
a risk of explosion according to ATEX 94/9/EC. The operating
safety of the devices is only guaranteed when used in accord-
ance with their designated use.
Disposal
The devices have been prepared in accordance with the RoHS
directive restricting the use of certain hazardous substances in
electrical and electronic equipment (2002/95/EC). After its final
decommissioning, the volumetric flow controller must be
properly disposed of.
INSTALLATION INFORMATION
Installation and commissioning
Installation with horizontal or vertical damper axle possible
position-independent
direct connection to moulded parts, such as bend or T-piece
possible
MAINTENANCE AND SERVICE
Service and maintenance instructions
Assemble in a way to allow inspection
maintenance-free, as there is no wear
not suitable for air containing sticky and oily particles
For maintenance, service, retrofitting, etc., inspection open-
ings in sufficient number and size must be provided on site.
LEGEND
D
e
[dB/Okt] =
Insertion
loss
EK (m/s)
=
Calibration
curve
f
m
(Hz)
= Octave band centre frequency
V
min
(m³/h) [l/s] = Minimum volumetric flow
V
max
(m³/h) [l/s] = Maximum volumetric flow
Hz
(fm)
= Hertz
K
L
(-)
= Correction value; relative
sound power level, relative to L
WA
K
Lw
(-)
=
Relative sound spectrum
LOA
(-)
= Number of holes in flat flange
P
(mm)
= Packing thickness duct silencer
NW (mm)
=
Nominal
width
U
5
(V) DC
= Measurement output (electric voltage)
V (m
3
/h) [l/s] = Air volume
V
[%]
= Tolerance for the volumetric flow setpoint
value
v
K
(m/s) =
Duct
velocity
øD (-)
=
Hydraulic
diameter
∆
p (Pa)
=
Pressure
difference
∆
p
t min
(Pa)
= Minimum static pressure difference
∆
p
t
(Pa)
=
Pressure
loss
