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EXCESSIVE HEAT:
When the pump is subjected to operating conditions that will cause the oil to be heated above 200 Deg F, the oil will
carbonize and become contaminated after a relatively low number of operating hours if standard hydrocarbon oil is used. The
higher the temperature, the quicker the oil becomes contaminated and thermally breaks down. In these type of high heat ap-
plications, US550SS oil is recommended.
CONTAMINATED AIR STREAM
When the air stream contains solids and/or liquids that may contaminate the oil, the oil must be changed more often. If the air
stream contains a small percentage of particulate matter, the solution is to install a pre-filter or knock-out pot to keep the
contaminates out of the pump.
Seal Oil Vacuum Pump (Power Generation)
On seal oil vacuum applications, large amounts of water vapor is often distilled out of the seal oil from the degassifiaction
tank with the water vapor entering the seal oil vacuum pump. The mixture of water and the vacuum pump lube oil inside the
seal oil vacuum pump will result in the formation of an oil/water emulsion that will reduce the viscosity of the vacuum pump
lube oil. Also, VARNISH can form inside the vacuum pump from the oil/water emulsion when the pump operates at elevated
temperatuers. The varnish will cause frictional drag on the motor and eventually cause the pump to stall. Using a lube oil with
detergent additive or performing a kerosene flush will help in the formation of the varnish.
VARNISH build-up on vacuum pump cylinder (above)
High temp operation from loss of lubrication (Right). Oil
line solenoid valve clogged, reducing oil flow to the pump.
Use detergent lube oil or synthetic oil for the vacuum
pump. VG68/VG100
