Ultragrade 15

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
  • Electron microscopes
  • Thin film sputtering
  • Surface studies
  • UHV systems
  • Leak detection
Technical data  
Vapour pressure mbar:  
20°C 5.8 x 10-6
100°C 3.0 x 10-2
Molecular weight 385
Specific gravity at 15°C 0.86
Viscosity cSt:  
at 20°C 104.2
at 40°C 38.1
Pour point °C -18
Flash point °C 220
Auto ignition point °C 355
Sulphur content % mass/mass 0