2.3 Oil system
Flow diagrams
Reference Description
A Air inlet
B Air/oil mixture
C Oil
D Wet compressed air
F Condensate
1 In case of a Workplace unit to the air outlet valve.
In case of a Full-Feature unit to the dryer
Note: The cooling fan is not provided on water-cooled compressors.
Description
In air receiver (AR) most of the oil is removed from the air/oil mixture centrifugally. The balance is removed
by oil separator (OS). The oil collects in the lower part of air receiver/oil separator (AR) which serves as oil
tank.
The oil system is provided with a by-pass valve (BV). When the oil temperature is below 60 ˚C (140 ˚F), by-
pass valve (BV) shuts off the oil supply from oil cooler (Co). Air pressure forces the oil from air receiver
(AR) through oil filter (OF) and oil stop valve (Vs) to compressor element (E) and the lubrication points. Oil
cooler (Co) is by-passed.
By-pass valve (BV) starts opening the supply from oil cooler (Co) when the oil temperature has increased to
60 ˚C (140 ˚F). At approx. 75 ˚C (167 ˚F), all the oil flows through the oil cooler.
Instruction book
2920 1634 04 17
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