This is a high-performance synthetic lubricant specifically formulated for reciprocating air compressors. It is marketed as: designed primarily for reciprocating compressors operating in difficult applications. Formulated with premium synthetic base stocks and performance additives wide temperature performance, even in adverse ambient conditions.

Example typical properties from the product brochure:

• ISO Grade: 68
• Viscosity @40 C: ~68 cSt
• Viscosity @100 C: ~10.3 cSt
• Viscosity Index (VI): ~139
• Flash Point: 270 C / 518 F
• Pour Point: 51 C / 59.8 F
• Four-Ball Wear (40 kg, 1200 rpm, 75 C, 1 hr): Scar diameter < 0.50 mm
• Demulsibility: Excellent

• Viscosity & thermal behaviour
  • The ISO 68 grade (viscosity ~68 cSt at 40 C) gives a good balance between fluid film strength and flow in moderate-to-heavy duty reciprocating compressors.
  • A high VI (~139) means the viscosity changes less with temperature than a low-VI oil this is beneficial when the compressor sees wide ambient or operating temperature swings.
  • A low pour point (51 C) implies it will function in cold ambient climates; the high flash point (~270 C) implies safer operation at elevated temperatures.
  • Good demulsibility means when water enters the system (which often does in compressor duty cycles via condensation) the oil can separate water efficiently, reducing sludge formation and optimizing lubricity.
• Service life & maintenance design
  • Because of the premium synthetic formulation, the oil is designed to deliver extended service intervals compared to standard mineral reciprocating compressor oils.
  • The oils design goals include fewer deposits, cleaner systems, better stability under heat, which contributes to reliability and lower maintenance.
  • Although specific drain interval numbers for the reciprocating version arent specified in the brochure (for the rotary screw version a up to 8,000 hours claim is made) the reciprocating version shares the premium features and is intended for more severe service.

Applications:

• All Vanair reciprocating air compressors