Kleen Air

Compressor Varnish Cleaner

No. 893


  • Rotary Screw Compressors
  • Rotary Vane Compressors
  • Reciprocating Compressors
  • Centrifugal Compressors
  • Hydraulic Systems
  • High Temperature Chains
  • Airline valves
  • Vacuum Pumps
  • Gear Boxes

The use of petroleum lubricants, primarily automatic transmission fluid (ATF), in rotary screw and rotary vane compressors results in the formation of varnish and carbon. The varnish and carbon is deposited throughout the system and can cause a number of serious operational problems, resulting in excessively high maintenance costs.

Kleen Air can help alleviate the problems caused by varnish and carbon.

Kleen Air is designed to be used as an additive in the lubricant to remove and suspend varnish while the compressor is in operation.

Kleen Air eliminates the need for disassembling the compressor for cleaning.

For maximum benefit, use Kleen Air prior to each lubricant change.

Kleen Air can be used for cleaning Heat Transfer systems with temperatures up to 400°F. Also, it can be used for cleaning high temperature chains.


Kleen Air is compatible with petroleum mineral oils, PAO synthetic fluids and most other synthetic fluids. Regular use of Kleen Air will prolong compressor fluid and compressor life by removing deposits that cause higher operating temperatures, wear and reduced efficiency. For maximum benefit use Kleen Air before each fluid change.


Initial Clean-Out Method:

Add one gallon of Kleen Air concentrate to each ten gallons of compressor oil in the unit, first draining enough oil to allow the addition of the Kleen Air. Continue to operate the compressor for 40 to 60 hours, allowing the treated oil to disperse and suspend the varnish. To avoid re-depositing the suspended contaminants, drain the oil while warm and replace filters. Refill with new oil.

Packing: Kleen Air is available in cases (six gallons), five gallon pails or 55 gallon drums.


ISO Grade 32
Viscosity @ 40º C, cSt: 32
Viscosity @ 100º C, cSt: 5.23
Viscosity Index 95
Specific Gravity @ 60 ºF 0.9738
Density lbs/gal 8.1098
Flash Point ºF (ºC) 480 (249)
Fire Point ºF (ºC) 505 (263)
Pour Point, ºF (ºC) 0 (-18)
NSF Registered HX-2