BERG KOMPBERG BSDF 30 - Oil Filter Replacement Procedure; Oil Separator Maintenance

Operating and Maintenance Manual 09/2019 – part I
Screw compressors
31
8.3.3. Oil filter
Maintenance procedure:
- Stop the compressor and close the pressure conduit valve.
- Switch off the power supply and take measures to prevent it from being unintentionally
switched on again by unauthorised persons.
- Wait minimum 5 minutes and then open the compressor housing.
- Check that the system has been emptied by slowly unscrewing the oil filler cap (use
protective clothing) (Fig.13). The compressed air can be hot.
- It is advised to use the special spanner to replace the filter.
- Apply some oil onto the seal of the new oil filter before screwing it in. Then screw the filter
in by hand, without using any tool.
- Start the compressor and check for leaks.
Caution: Hot oil
.
8.3.4. Oil separator
When the air sucked in is highly contaminated or the operation takes place at elevated
temperatures, the separator gets contaminated faster and the cartridge must be replaced
more frequently. The need for an earlier replacement is indicated by the motor overload,
too high oil temperature and, in extreme cases, activation of the safety valve. In the above
cases, please consult the BERG service or authorised service centre listed in the Warranty
Book.
The separator is designed to filter out the oil remains from the compressed air treated
initially in the screw block body or oil tank.
After passing the effective separator, oil content in the compressed air is
approx.3mg/m
3
.The actual amount of oil consumed depends on many factors and may
exceed the assumed amount of <3 mg/m
3
. The amount of oil consumed depends on:
operating temperature, frequency of pressure changes, pressure, number of compressor
starts and stops, number of separator worked hours. Therefore, the average oil content in
compressed air can be in the range of 5-8 mg / m3 and this is normal and for this value
should be designed the treatment plant.
No dirt
or dust
particles should enter the screw block inside from the
suction side.
screwing out screwing in
Fig. 17 Oil filter – maintenance operations.