SF-540 | SYNTHETIC COMPRESSOR OILS

GENERAL DESCRIPTION:

SELCO SF-540 SUPRA COOLANT is designed to meet the needs of rotary and reciprocating industrial compressors. The product exhibits excellent high temperature properties coupled closely with outstanding oxidation resistance.

Currently available lubricants often compromise on compressor requirements, for example reciprocating units using automotive crankcase oils formulated to MIL specifications can suffer from heavy carbon and ash deposits on valves, SELCO SUPRA COOLANT on the other hand, is formulated solely for compressors.

 

RECOMMENDED USAGE:

SELCO SF-540 is ideal for use in industrial rotary and reciprocating compressors, delivering superior protection and performance.

Category:

Description

ADVANTAGES:

  • Reduce carbon formation and the risk of explosion, and increase safety
  • Virtually eliminate varnish and sludge deposits, ensuring that items such as oil/air separators in rotary. Compressors function efficiently at all times.
  • Provide better demulsibility, which is needed for rapid and complete water separation (this is particularly oil flooded compressors, where condensate can accumulate in oil receivers).
  • Extend oil drainage intervals up to 8000 hours or 12 month’s operations
  • Outstanding operating temperatures range which will affect operating economics in compressor down time and lubricant utilization.
  • Good compatibility with elastomers used as seals in reciprocating compressors.
  • Reduce oil consumption and carry over by virtue of their low volatility and good lubrication properties
  • Maintain the high efficiency of reciprocating compressors by significantly reducing valve deposits.
  • Reduce maintenance costs by reducing wear and deposits associated with the use of mineral oils, savings on replacement parts and labour can be achieved.
  • Improve oil receiver and crankcase performance by virtue of their low foaming properties

PROPERTIES:

ISO GRADE 32 46
Viscosity cSt @ 40°C (ASTM D-445) 33.2 47
Viscosity cSt @ 100°C (ASTM D-445) 7 9
Viscosity Index (ASTM D-2270) 100 179 176
Flash Point °F/°C (ASTM D-92) 560°/294° 270 271
Fire Point °F/°C (ASTM D-92) 610°/321°    
Pour Point °F/°C (ASTM D-92) -22°/-30° -52 -51
Auto-Ignition Point °F/°C 850°/454° (ASTM E659) 383 386
Specific gravity 20 ° C (ASTM D-1298)    
Four Ball Wear Test (ASTM D-4172) Scar Diameter, mm (ASTM D2783)    
4-Ball Wear, 40kg, 1 hr., 1800 RPM, (mm) (ASTM D2783) 0.76 0.76
Weld Point, kg (ASTM D2783) 130 130
Evaporation Loss, %, 149°C, 73 hrs. 0.48 0.48
Copper Strip Corrosion, 3 hrs. @ 100°C (ASTM D130) 1A 1A
Carbon Residue @ 520°C    
Acid Value (mgKOH/g),    
Aniline Point °C (ASTMD-611)    
Moisture PPM (ASTMD-1744)    
Specific Gravity, ASTM D941 0.9921 0.9921
Ferrous Metal Corrosion (Rust Test)    
Distilled Water, (ASTM D665A) Pass Pass
Synthetic Sea Water (ASTM D665B) Pass Pass
Foam Tendency (Sequence I, II, III), ASTM D892 Nil Nil
Density (Grams per CC @ 25°C), ASTM D941 0.9883 0.9883
Total Acid Number (ASTM D664) 0.04 0.04
pH (ASTM D664) 8.5 8.5
High Pressure Oxidation Test (Hr.), ASTM D2272 18 18
Specific Heat, cal/gm/°C, @88°C 0.502 0.502
Thermal Conductivity, cal/(cm) (sec.) 25°C 3.64 3.64
Thermal Conductivity, cal/(cm) (sec.) 65°C 3.52 3.52
Thermal Conductivity, cal/(cm) (sec.) 95°C 3.44 3.44
Coefficient of Expansion, %/°C 0.074 0.074