2 Machine description
2-7
2.3 Compressor unit (continuation)
2) As a “non return valve“ it prevents at the same time the re-
verse flow of compressed air from the air mains or the air ves-
sel, back into the compressor unit. Due to this function the
compressor unit is totally pressure relieved once it is stopped.
The valve operates automatically. The setting of the minimum
pressure valve must only be done by persons authorised by the
manufacturer.
Oil separator cartridge (Item 7)
The oil separator cartridge is not only designed for filtering the
oil from the compressed air
,
but serves at the same time to
reclaim the residual oil after pre-separation as drops, formerly
micro-distributed in the system. This cartridge is a spin on/off
type and – by means of the connection nipple – is screwed on
to the filter support of the oil re-claimer (see illustration below)
Illustration: oil separator cartridge
Oil return scavenge window / oil return scavenge
non-return valve
The oil return window (fitted to some air ends) is situated
near to the oil separator cartridge and shows the scavenged
oil coming from the a.m. cartridge.
When starting the compressor the scavenge window is filled
with oil due to its accumulation during standstill. After a few
minutes a mixture of oil and air can be observed. Separation
of oil in the cartridge takes place.
If after a longer period of operating time no oil can be observed
in the scavenge window
,
a disturbance may have happened
e.g. a clogged borehole. As a consequence the oil separated
will be carried over in the compressed air into the air
mains/vessel.
Only personnel authorised by the manufacturer are allowed
to rectify such problems.
Description unit
components
(contd.)
sealing
return oil
compressed air
from
separator
