Compressor Discharge System, Functional Description - Sullair 900XH Operators Manual And Parts Lists

Figure 2-2 Compressor Cooling and Lubrication System
ly causing all fluid to flow to the cooler. The thermal
valve incorporates a pressure relief valve, which
allows fluid to bypass the cooler, if the cooler
becomes plugged or frozen. This helps assure that
fluid will continue to be provided to the compressor
for lubrication. After the fluid passes through the
thermal valve it is then directed through the main
fluid filter. There the fluid is filtered in preparation for
injection into the compression chamber and bear-
ings of the compressor unit. The filter has a replace-
able element and a built-in bypass valve which
allows the fluid to flow even when the filter element
becomes plugged and requires changing or when
the viscosity of the fluid is too high for adequate
flow. After the fluid is properly filtered, it then flows
on to the compressor unit where it lubricates, seals
and cools the compression chamber as well as
lubricates the bearings and gears.
The fluid stop valve functions on shutdown when it
shuts off the fluid supply to the compressor unit.
The fluid stop valve is held open by a pressure sig-
nal from the compressor discharge. At shutdown,
the pressure signal is lost and the fluid stop valve
closes, isolating the compressor unit form the cool-
ing system.
2.5 COMPRESSOR DISCHARGE SYSTEM, FUNC-
TIONAL DESCRIPTION
Refer to Figures 2-2,
pressor unit discharges compressed air/fluid mix-
ture into the sump.
The sump has three functions:
1. It acts as a primary fluid separator.
2. Serves as the compressor fluid sump.
3. Houses the air/fluid separator.
The compressed air/fluid mixture enters the sump
and is directed against the side wall. By change of
direction and reduction of velocity, large droplets of
Section 2
DESCRIPTION
2-3A or 2-3B. The Sullair com-
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