Quincy QGV Series, Instruction Manual

Page: 51 / 90

Section VI - Compressor Fluids
Lubrication
QGV models use pressure differential
to circulate the fluid. Positive pressure
maintained in the reservoir forces fluid
throughout the machine. Fluid is circulated
through the cooler, fluid filter, and into the
compressor.
In the compressor, fluid is diverted through
internal passages to ensure positive
lubrication of the bearings and shaft seal.
The remainder of the fluid is injected at the
beginning stage of the compression cycle
to seal clearances and to cool and lubricate
the rotors.
Each Quincy compressor is filled at
the factory with the correct amount
of one of the synthetic fluid listed in
the Fluid Specifications. Mineral oil
can be requested and used in specific
applications. The use of other brands or
types of fluid may reduce the design life
of the compressor or cause problems with
filtration or carryover. Consult the Quincy
Service Department before changing
brands of fluid.
Fluid Sample Valve
QGV models are equipped with a fluid
sample valve located at the discharge of
the fluid filter.
Figure 6-1. Fluid Sample Valve
Fluid samples should be taken from the
sample valve while the compressor is
running at normal operating temperature
(see Sampling Procedures - page 47).
Quincy Compressor-QGV Series
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