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SECTION 5
COMPRESSOR LUBRICATION – SEPARATION, FILTRATION AND
CONTROLS
Air/oil under pressure will cause severe personal injury or death. Shut down
compressor, relieve system of all pressure, disconnect, lockout and tagout
power supply to the compressor package before removing valves, caps, plugs,
fittings, bolts and filters.
High temperature operation can cause damage to equipment or personal injury.
Do not restart the unit repeatedly after high temperature shutdown. Find and
correct the malfunction before resuming operation.
COMPRESSOR OIL SYSTEM
– Lubricating oil is employed to absorb the heat of compression, lubricate
moving parts and seal internal clearances between the rotor and air cylinder. Pressure differential
between the air/oil reservoir and various injection points is used to flow oil through the package.
Oil exits the air/oil reservoir and is then routed to the heat exchanger and the thermal mixing valve, where
cold (oil cooler branch) and hot (bypass branch) are mixed to the desired (140
°
F) temperature.
Tempered oil is sent to the oil filter for cleaning, then onto various points in the 1st stage compressor and
inter-stage pipe manifold through various solenoid valves and orifices. The injected oil absorbs heat from
compression while progressing through the compression chamber and is then discharged back into the oil
separation chamber as a mixture of liquids and aerosols (oil) and gas (air).
Centrifugal action within the air/oil reservoir separates the bulk of the oil from the air, where it is collected
and readied for the next cooling cycle. The compressed air and aerosols continue through a coalescing
filter, where all but 2 ppm of oil is removed from the compressed air and discharged to the aftercooler.
RECOMMENDED LUBRICANT
– The Gardner Denver compressor is factory-filled with AEON 9000TH
lubricant. This lubricant is formulated to the highest quality standards and is factory-authorized, tested
and approved for use in our rotary screw compressors. AEON 9000TH lubricant is available through your
authorized Gardner Denver compressor distributor.
OIL SPECIFICATIONS
- The factory fill compressor lubricant is Gardner Denver AEON 9000TH
lubricating coolant for all-year-round operation. This is a polyol ester (POE) synthetic lubricant specially
formulated for high operating temperatures (210
°
F to 225
°
F), which can extend change intervals up to 4
times that of a petroleum based lubricant.
It is highly recommended that the lubricating oil be analyzed frequently in order to identify its quality and
remaining operational life. A sampling valve, located on the tubing between the oil filter and the injection
manifold, is provided for this purpose.
