Engineering manual - SAB 193-233-283 S A-frame (including ATEX)
008831 en 2022.02
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Technical description
Fig. 23
Note: The sectional view shows the valve structure. Some of the internal oil channels are not
visible.
4.14 External oil filter
The compressor unit is equipped with an external oil filter, pos. 195/196, which is mounted in
the oil pipe between the oil separator or oil cooler (if present) and the compressor.
The external oil filter may be constructed with one or two parallel filters.
The filter canister may contain two or three filter cartridges depending on compressor size.
Fig. 24: External oil filter
The filter is a horizontal filter through which the oil must pass the filter cartridge from the out-
side in. This way dirt will accumulate outside the filter cartridge and the filter housing must
therefore be cleaned when the filter cartridge is replaced. The filter is protected against burst-
ing because UniSAB III will stop the compressor if the pressure drop across the filter exceeds
1 bar.
Stopping the compressor at a too high differential pressure will happen with a 600 second de-
lay as the pressure difference may momentarily exceed 1.7 bar if the compressor is started up
with cold oil.
D
Oil draining/purging Filter cartridge
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