SECTION 2 1100E, 1500E, 1800E USER MANUAL
15
2.5 COMPRESSOR DISCHARGE
SYSTEM, FUNCTIONAL
DESCRIPTION
Refer to Figure 2-3. The compressor unit discharges
the compressed air/fluid mixture into the combination
separator/sump. The separator/sump has three basic
functions:
1. It acts as a primary fluid separator.
2. Serves as the compressor fluid separator/
sump.
3. Houses the final fluid separator.
The compressed air/fluid mixture enters the
separator/sump and flows through an internal baffle
system. The direction of movement is changed and
its velocity significantly reduced, thus causing large
droplets of fluid to form and fall to the bottom of the
separator/sump. The fractional percentage of fluid
remaining in the compressed air collects on the
surface of the separator element as the compressed
air flows through the separator. A return line (or
scavenge tube) leads from the bottom of the
separator area to a medium pressure region of the
compressor unit. Fluid collecting on the bottom of the
separator is returned to the compressor by a
pressure differential between the separator/sump
and the compressor. There is also an orifice in this
return line to assure proper flow. The separator
system reduces the fluid carry-over to less than 1
ppm (parts per million) for Sullube or 2 ppm for 24KT
at nominal rates pressures. A message develops on
the WS Controller if abnormal pressure drops
through the separator element. At this time,
separator element replacement is necessary.
A minimum pressure/check valve, located
downstream from the separator, assures a minimum
separator/sump pressure of 50 psig (3.4 bar) during
loaded conditions. This pressure is necessary for
proper air/fluid separation and proper fluid
circulation.
A terminal check valve is incorporated into the
minimum pressure/check valve to prevent
compressed air in the service line from bleeding back
into the separator/sump on shutdown and during
operation of the compressor in an unloaded
condition.
A pressure relief valve (located on the wet side of the
separator) is set to open if the separator/sump
pressure exceeds the separator/sump rating. A
temperature switch will shut down the compressor if
the discharge temperature reaches 235˚F (113˚C).
Fluid is added to the separator/sump via a capped
fluid filler opening, placed on the inlet housing to
prevent overfilling of the separator/sump. A sight
glass enables the operator to visually monitor the
separator/sump fluid level.
WARNING
DO NOT remove caps, plugs, and/or other
components when compressor is running
or pressurized. Stop compressor and
relieve all internal pressure before doing so.
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