Ultragrade 20

Ultragrade® 15, 19, 20 and 70, which result from a new process. Most manufacturers use a solvent refining process, whereas these oils are produced by a unique hydrotreating process. This process eliminates nitrogen, sulphur and oxygen and the aromatic hydrocarbons, leaving a clear base stock essentially free of impurities.

Features and Benefits

  • When combined with additives, the Ultragrade® oils give improved vacuum performance, thermal and oxidation stability and rust inhibition.
  • The anti-oxidants included in the oils enable the pump to withstand high operating temperatures without oil degradation, so extending intervals between oil changes.
  • The properties of the oils allow them to be used in a wide range of applications.


  • Mass spectrometers
  • Leak detection
  • TV tubes
  • Power valves
  • Distillation
  • Furnaces
  • Impregnation
  • Chemical pumping
  • Packaging
  • Mechanical booster
Technical data  
Vapour pressure mbar:  
20°C 2.1 x 10-7
100°C 3.0 x 10-3
Molecular weight 500
Specific gravity at 15°C 0.86
Viscosity cSt:  
at 20°C 352
at 40°C 103
Pour point °C -12
Flash point °C 260
Auto ignition point °C 365
Sulphur content % mass/mass 0