Bauer mariner 320 - Filter System Lifetime

WARNING
Instruction Manual  Breathing Air Compressors
29
LIFETIME
The filter system is subject to dy
namic load. It is designed for a cer
tain number of load cycles, which
originate from an abrupt pressure loss at condensate
drain (1 load cycle i.e. condensate drain = 1 depressu
rization, 1 pressurization). Acc. to no. 15 of the annex
II to the German pressure vessel regulations the filter
housing has to be inspected internally by an expert af
ter having reached half of the determined number of
load cycles. The inspections have to be arranged by the
operator. After reaching the max. number of load cycles
the filter assembly must be replaced, otherwise the
housing may burst due to material fatigue. Refer to the
pressure vessel operating manual delivered with the
unit.
The maximum recommended amount of four load cycles per
hour should not be exceeded. If it is possible to regulate the
operation of the unit to such a degree as to achieve four load
cycles per hour, in our opinion this would be an optimum be
tween usage and actual life.
CARTRIDGE SAFETY BORE
The filter system P31 is designed to prevent pressurizing in
the absence of the filter cartridge. A bore provided in the
filter bottom is sealed air-tight only if the cartridge is in place
(Abb. 42).
No pressure build up without cartridge!
Without cartridge the venting bore is not sealed, the air es
capes into the atmosphere, no pressure can be built up and
thus it is ensured, that unfiltered air is not supplied to the con
suming device.
The venting bore is also used to check the O-rings on the car
tridge pin. If air is leaking out of the venting bore even though
a cartridge is installed, the O-rings are either broken or were
damaged on installation.
Remove and check cartridge. If necessary replace cartridge
or O-rings.
Abb. 42 Safety bore
Venting bore
Filter base
Cartridge receptacle
Abb. 43 Filter system P31
1 Filter inlet
2 Jet pipe
3 Filter head
4 Final pressure safety valve
5 Housing
6 Triplex cartridge
7 Filter base
8 Pressure maintaining valve
9 Condensate outlet
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9