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Home / Compressed Air V2 / Summit Industrial Products V2 / Summit NGL 444 Series Gas Compressor Lubricant

Summit NGL 444 Series Gas Compressor Lubricant


Summit NGL-444 polyalkylene glycol lubricant was formulated to combat these problems associated with high pressure reciprocating compressors pumping natural gas, carbon dioxide, or process gases.  NGL-444 is extremely resistant to hydrocarbon dilution and absorption by the gas stream.  The result is a lubricant maintaining the proper viscosity for wear protection and resisting wash-out and carryover.

The extremely high viscosity index of NGL-444 allows lubricant protection over a broad temperature range.  The low pour point provides all season ease of handling even in very cold climates.

Summit NGL-444 can offer these same advantages when compressing a number of difficult gases including hydrogen, helium and nitrogen.


The lubricant problems generally encountered with the compression of gas are related to the reaction of the gas stream to the lubricant.  These include:

  • Solubility of gas in the lubricant causes reduced lubricant viscosity resulting in cylinder scoring and high wear rates.  Compensating for this with a higher viscosity lubricant can cause handling problems at lower temperatures.
  • Absorption of lubricant into the gas stream results in high lubricant usage rates and a depletion of protective lubricant film in the cylinder.
  • Condensed hydrocarbon liquids in the cylinder area can "wash" the lubricant from the cylinder walls causing severe mechanical damage.