Compressor Lubrication Tips PDF Print E-mail
Written by Maintenance Technology International inc.   
Saturday, 12 June 2010 10:55
Article Index
Compressor Lubrication Tips
Cylinder Oils
Guide to Rotary Compressor Lubrication
Sliding vane compressors & Liquid piston rotary compressors
Helical Lobe Screw Compressors
Straight lobe screw compressors & Axial flow compressors
Conversion to Synthetics
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Guide to Reciprocating Compressor Lubrication (Crankcase and Cylinders)

Crankcase Oils

Crankcase oils recommended are ISO viscosity grade 68, 100, 150, or 220 depending upon ambient temperatures. Generally, these lubricants will be paraffin base recirculating oils with rust and oxidation inhibitors and some may have anti-wear characteristics. If mineral base hydrocarbon oils are used where discharge temperatures are below 149°C (300°F), napthenic base oils are frequently recommended because these lubricants have low floc points and will not form wax crystals at low temperatures.

When discharge temperatures are between 150°C–200°C (302°F–392°F), it is recommended that synthetic diester, polyglycol, polyolester or phosphate ester fluids of equivalent viscosity grades be used.

When compressing chemically active gases, such as oxygen or hydrogen chloride, mineral base oils, including synthetic hydrocarbons such as polyalphaolefins and alkylated aromatics, must never be used. (Mineral base oils coming into contact with oxygen will cause explosions). Lubricants recommended for these applications include synthetic chlorofluorocarbons and polybutenes.

In self driven integral engine compressors, both engine and compressor pistons are connected to the same crankshaft. The running gear may also share a common crankcase. As a result, diesel engine oils are frequently used and may be mineral base or synthetic of similar viscosity grades as noted previously.

Last Updated on Saturday, 12 June 2010 11:07