VLV55|VLV65 - Volumetric flow controller
TECHNICAL DOCUMENTATION
Areas of application | Processing
Construction subject to change
No return possible
Version: 2017-04-24 | Page 4
AREAS OF APPLICATION
for supply and return air systems with low pressures
and low air velocity
for constant CAV or variable VAV installations
for positive control V
min
, V
mid
, V
max
, "OPEN" or "CLOSED"
For volumetric flow and linear pressure control
at ambient temperatures 0° to +50°C,
requirement: measuring air 0...+50°C/5...95% rH,
non-condensing
for regulating the air velocity in the duct in
the range of 0.5...8 m/s
VLV55 for air velocity 0.5 - 5 m/s
VLV65 for air velocity 1 - 8 m/s
Minimum pressure difference of 5 - 150 Pa
When using volumetric flow controllers in roof central units, in
extreme cases, condensation can build up in the measuring
pipes of the volumetric flow controller as a result of the large
temperature differences between the air flowing through the
volumetric flow controller and the surrounding air. This con-
densation may affect or damage the sensor. This is why for this
field of application care must be taken to insulate the housings
of the volumetric flow controllers and the measuring hoses (to
prevent condensation) and to mount the controllers in such a
way that any condensate formed on the outside of the measur-
ing hoses can run downward and be drained (without entering
the sensor).
When connecting SCHAKO components to customer installa-
tions, any compatibility problems are beyond our scope of re-
sponsibility and must be solved on site.
Tests and standards
The volumetric flow controller VLV-… has been tested by the
designated body in accordance with the following regulations:
Completed tests
VDI 6022, Sheet 1: Hygienic requirements of ventilation and
air-conditioning systems
DIN EN 1751: Ventilation for buildings - Air terminal devices -
Aerodynamic testing of damper and valves
DIN EN 13779 (2007): Ventilation of non-residential buildings
Applied standards
Leakage classification: DIN EN 1751 (2014-06)
RoHS 2002/95/EC
EMC 2004/108/EC
PROCESSING
Housing
Galvanised sheet steel (-SV)
Galvanised sheet steel with DD coating (-DD)
Housing leakage according to DIN EN 1751, class C
Damper blade
Galvanised sheet steel (-SV)
Galvanised sheet steel with DD coating (-DD)
Damper axle
Passivated steel
Brass
Damper blade seal
made of EPDM, silicone-free, halogen-free
airtight sealing design to DIN-EN 1751, class 4
Ring chamber sealing
made of EPDM, silicone-free, halogen-free
Damper bearing
Plastic bearing
Measuring sensor
round Venturi nozzle made of aluminium
to DIN EN ISO 5167 (-SV)
round Venturi nozzle made of aluminium
to DIN EN ISO 5167 with DD coating (-DD)
Model
round model, for round ductwork connection to DIN EN 1506,
with damper blade seal for airtight sealing to DIN EN 1751,
class 4
VLV55 for air velocity 0.5 to 5 m/s
VLV65 for air velocity 1 to 8 m/s
Controller
LMV-D3-MP-SO, 5 Nm (-A001)
LMV-D3-MF-SO, 5 Nm (-A006)
227VM-024-05, 5 Nm (-A061)
Other controllers available on request
