It is completely manufactured in the ROTAIR factory and consists of a central body (cylinder) inside which are
fitted two screw rotors with asymmetric section, a male one with 5 lobes and female one with 6 lobes.
The cylinder is closed at the ends by two head sections which contain the bearings which bear the radial and
axial loads created by the air compression. A series of channels, inside the cylinder and heads, undertake to
deliver the oil to the various components. The distribution of the lubricant , serves to lubricate the bearings
and to maintain a coating of oil between the rotors and the bearings themselves as well as the internal
cylinder walls, thereby promoting compression resistance. Another important function of the oil injected
between the rotors is that of absorbing the heat generated by the air compression.
The compressed air supplied by this compressor is free of any pulsations and compression comes about
axially. A "regulator" unit is mounted on the compression unit, the purpose of which is to regulate the
quantity of air taken in according to the amount of air consumed. A double-stage filter mounted on the top of
this unit guarantees maximum purity of the suctioned air.
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