XAS136/186 Dd
12
2.5 AIR FLOW (SEE FIG. 2.3)
The system comprises:
AF Air filter
AR/OS Air receiver/oil separator
CE Compressor element
UA/UV Unloader assembly with unloader valve
BDV Blow-down valve
LV Loading valve
Air drawn through the airfilter (AF
CE) into the compressor element
(CE) is compressed. At the element outlet, compressed air and oil
pass into the air receiver/oil separator (AR/OS).
The check valve (CV) prevents blow-back of compressed air when
the compressor is stopped. In the air receiver/oil separator (AR/OS),
most of the oil is removed from the air/oil mixture; the remaining oil
is removed by the separator element.
The oil collects in the receiver and on the bottom of the separator
element.
The air leaves the receiver via a minimum pressure valve (MPV)
which prevents the receiver pressure from dropping below the
minimum working pressure (specified in section 8.3), even when the
air outlet valves are open. This ensures adequate oil injection and
prevents oil consumption.
A temperature switch (TS) and a working pressure gauge (PG) are
comprised in the system.
A blow-down valve (BDV) is fitted in the unloader assembly to
automatically depressurise the air receiver (AR) when the compressor
is stopped.
Fig. 2.3
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