Ultragrade 19

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
  • TV tubes
  • Power valves
  • Distillation
  • Space studies
  • Furnaces
  • EB welders
  • Impregnation
  • Chemical pumping
  • Packaging
  • Metallisation
Technical data  
Vapour pressure mbar:  
20°C 1 x 10-8
100°C 1.0 x 10-3
Molecular weight 420
Specific gravity at 15°C 0.86
Viscosity cSt:  
at 20°C 143.7
at 40°C 48.6
Pour point °C -16
Flash point °C 230
Auto ignition point °C 355
Sulphur content % mass/mass 0