7/18
NT 1401-AL00 10 20 (2) MX12 e
2. GENERAL DATA
2.1 Principle of operation
The male screw and the female screw mesh and rotate
in opposite directions inside the casing fitted with inlet
and discharge ports.
Rotation generates a volume increase on the inner face
between threads and grooves, which corresponds to
inlet, and a volume reduction on the upper face, which
corresponds to compression.
On the discharge port side, a set of gears synchronizes
the male screw and the female screw. Thus, the screws
are not in contact. The discharged air does not enter in
contact with any friction part and remains clean and free
from particles.
On the drive shaft side, the female screw is driven by a
set of step-up gears.
An oil pump delivers pressurized oil which circulates,
lubricating gears and ball bearings.
Sealing is provided between lubricated parts and the
compression stage by means of labyrinth seals. These
seals do not enter in contact with the shaft and are not
subject to wear.
Thanks to their technology, MX12 compressors are
reliable and have a long service life.
MX12 compressors need very limited maintenance,
which reduce vehicle downtime.
MX12 version S drive speed were defined so as to drive
it directly through universal joints from a P.T.O. shaft.
MX12 compressor is therefore fitted within the chassis.
Thanks to this system, the installation is lighter and
saves space on the side of the vehicle for other acces-
sories.
MX12 version N can be directly driven by an electric,
hydraulic or diesel motor.
Our compressors are delivered without oil. The use
of a compressor with an incorrect oil level can lead
to important property damage and serious injuries.
2.2 Technical characteristics
The operating characteristics are given in the indicative
operation conditions : ambient temperature and air inlet
temperature 20°C, atmospheric pressure : 1013 mbars.
Speed allowed at the compressor drive shaft : See §
O
PERATING
RANGES
- R
ECOMMENDED
DRIVE
CONDITIONS
.
Rotation direction:
N version
S version
CAUTION
Version
S
N
15
R
L
18
L
R
20
R
L
24
L
R
