Produkt.pm6.5 - USA
Page 2.8
Product description
BOGE Operating instructions for S 40-2...S 341 / SF 40-2...SF 220 series screw compressors
Oil circuit
The oil injected into the air end has the following function:
– It dissipates the compression heat (cooling).
– It seals the gaps between the screws and between the screws and housing.
– It lubricates the bearings.
2.2 Function description
1 = Compressed air/oil receiver
The oil separated from the compressed air through the force of gravity collects
in the compressed air/oil receiver.
The system pressure forces it out of the receiver into the air end.
2 = Thermostatic oil control valve
Depending on the oil temperature, the thermostatic oil control valve either
allows the oil to pass through the oil cooler or through a bypass (e.g. in the
starting phase).
Thus the oil constantly maintains its optimum operating temperature.
3 = Oil cooler (air or water cooled)
The oil cooler cools down the hot oil to operating temperature.
4 = Oil filter
The oil filter traps impurities in the oil.
5 = Air end
The injected oil returns to the compressed air/oil receiver together with the
compressed air. There, it is separated through the force of gravity.
6 = Drainage line
The collectet oil from the oil-separator is drained back to the air end into the
oil circuit via the drainage line.
Fig. 2.2:
Components of the oil circuit
4
56
2
1
3
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