SKF LUBRILEAN Vario, Operating Instructions Manual

Page: 12 / 32

Structure and function Page 12
EN
8.3 Structure of the system
The MQL system L
UBRI
L
EAN
®
Vario is equipped
with the following valves, which serve the
purpose of regulating the mixture composition
of the aerosol and regulating the aerosol
volume flow:
8.3.1 Main air valve (no. 5)
The main air valve separates all of the following
parts of the aerosol container from the
pressurised air supply. No aerosol is generated
when the main air valve is closed.
The aerosol container and the
following connected parts can also be
under pressure when the main air
valve is closed.
8.3.2 Oil valve (no. 11)
The oil valve regulates the quantity of lubricant
needed for the generation of aerosol. The oil
valve is integrated into an adjustable float
flowmeter. It is operated manually and is
continuously adjustable. Changing the lubricant
flow rate is indicated by the display of the float
flowmeter.
8.3.3 Pressure control valve (no. 7)
The pressure control valve regulates the flow of
aerosol. It is operated manually and is
continuously adjustable. To open the valve, pull
the rotary knob out in the direction away from
the system, hold it in this position and then turn
it clockwise. To close it, pull the knob and turn it
anti-clockwise. The change to the setting is
indicated on the pressure gauge.
8.3.4 Secondary air valve (no. 8)
The secondary air valve dilutes the aerosol with
additional air. This guarantees a sufficient flow
rate of the aerosol. The secondary air valve is
operated by hand like the air valve. The change
to the setting is indicated on the pressure
gauge.
8.4 Optical fill level display
There is a column pipe on the side of the
aerosol container where you can directly see
the reading of the lubricant level. Minimum and
maximum levels are indicated by the markers
on the aerosol container.
Fig. 2. Fill level indicator (no. 17) – pin
assignment for upper connector
Pin 1: + 24 V
Pin 2: Output max. fill level
Pin 3: 0 V
Pin 4: Output overfull
Fig. 3.
Fill level indicator (no. 17) – pin
assignment for lower connector
Pin 1: + 24 V
Pin 2: Output min. fill level
Pin 3: 0 V
Pin 4: Output reserve
8.5 Electrical fill level indicator
There is also the option to equip the MQL
system L
UBRI
L
EAN
®
Vario with a four-point float
switch. See Fig. 2 and for the pin assignment.