Section VII - Compressor Fluids
Lubrication
Most Quincy Compressors are equipped
with a positive displacement fluid pump
mounted to the compressor and directly
driven by one of the rotors. 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. Models not equipped
with a fluid pump use pressure differential
to circulate the fluid. Positive pressure
maintained in the reservoir forces the fluid
throughout the machine.
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 Level
Fluid level is monitored by a sightglass or
a dial gauge while in operation. Fluid level
should be in the “run” area on the dial
gauge or completely fill the sight gauge.
DO NOT OVERFILL.
Figure 1-1. Fluid Level Sight Gauges
Each unit comes equipped with a fluid level
sight gauge, fluid fill opening, and a fluid
drain in the reservoir. The fill plug is drilled
to allow some pressure to escape before
the plug is completely removed. Should
you hear pressurized air venting through
the hole, immediately screw the plug back
into the reservoir. Relieve the pressure in
the machine before proceeding.
Caution!
Hot fluid under pressure could cause
death or serious injury. Do not remove
the fluid fill plug and attempt to
add fluid to the reservoir while the
compressor is in operation or when
the system is under pressure. Be sure
that the compressor’s red mushroom
stop button is pushed in and locked
and that the main power disconnect
switch is in the off position and locked
out to assure that the compressor will
not start automatically.
Quincy Compressor-QGB
™
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