PACIFIC D23
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P a g e
PACIFIC D23
Nardi Compressori – www.nardicompressori.com
7.09
MAINTENANCE OF INTERMEDIATE SEPARATORS:
In the compression phase the air undergoes a temperature increase that from one stage
and the other is cooled by a series of cooling coils (intercooler). This sudden thermal
change produces condensation which is eliminated by intermediate separators. Within
the intermediate separators there are filtering elements that need to be changed
periodically.
The steps for changing the filtering elements are as follows:
•
With the compressor switched off, depressurize the separators using the
condensate drain tap.
•
Unscrew the bottom part of the separators.
•
Unscrew the filtering element and replace it with a new one.
•
Wipe the bottom of the separator housing with a damp cloth and make sure there
is no corrosion.
•
Replace the O-rings.
•
Close the separator securely.
When used at a pressure exceeding 300 bars, intermediate separators must be replaced after 10000 hours.
7.10 CARBON FILTER FOR BREATHING AIR:
The carbon filter is used to remove the water and oil residues that have
passed the intermediate separators. The filter operates in a chemical
fashion, not mechanical, with materials that absorb water and oil particles,
making the compressed air breathable in compliance with European
Standard DIN EN 12021
The filter has two safety features. The first consists of a hole in the filter
body (safety cartridge bore) that is closed when the cartridge is inserted. Its
importance is that it makes it impossible to fill the cylinders if the cartridge is
missing. The second safety feature is a milling cut on the thread of the filter
body (safety de-pressure filter). In the case the filter head came accidentally
unscrewed without depressurizing the compressor; this milling cut provides
a discharge path for the air that is contained inside the filter to be released.
The life of the components of the filter is determined by the number of work
cycles since the filter base and the filter head are subjected to dynamic
loads due to pressurization and depressurization of the filter. Nardi
Compressori recommends that a technical inspection be performed every
500 hours of operation. The filter cartridge should be replaced once
exceeded the 8000 cycles at 300 Bar or 21000 cycles at 225 Bar. With a
rough estimate of 4 cycles per hour at 300 bar, the filter cartridge must be
replaced after 2000 hours of operation. At 225 Bar, the filter cartridge must
be replaced after 5000 hours of operation.
