Klüberalfa GR Y VAC 2 Vacuum Grease –
Temp Range (-20 to +250 (°C))
Special greases for vacuum applications
Klüberalfa GR Y VAC greases are white, homogeneous long-term greases based on perfluorinated polyether (PFPE) oils and polytetrafluoroethylene (PTFE) thickener. Besides their good resistance to high temperature and aggressive media, Klüberalfa GR Y VAC greases show low evaporation under vacuum conditions.
Klüberalfa GR Y VAC greases are made in three different NLGI classes, allowing component-specific selection for lifetime lubrication.
- Low evaporation under vacuum conditions
- High thermal stability
- Good resistance to aggressive media
- Neutral towards plastic materials
Klüberalfa GR Y VAC are preferred greases for applications under vacuum, e.g. in components of the electro-mechanical industry.
Further application examples are:
- Linear guides in cleanrooms
- Semiconductor technology
- Lubrication of seals
Behavior towards elastomers and plastics
Lubricants based on perfluorinated polyether oils and polytetrafluoroethylene are generally regarded as neutral towards most elastomers and plastics (exception: perfluorinated rubber). Nevertheless we recommend testing compatibility with the material to be used, especially prior to series application.
For optimum lubrication results, we recommend cleaning the friction points with white spirit 180/210 followed by Klüberalfa XZ 3-1. Then blow the surfaces with clean, dry compressed air or hot air to remove solvent residues. For initial lubrication, the friction points must be clean and bright, i.e. free from oil, grease and perspiration. Klüberalfa GR Y VAC greases are applied directly or by means of brush, spatula or lubricant dispenser.
The technical sales departments at Klüber Lubrication may be contacted at any time for advice to ensure optimum service life results.
|Product data||Klüberalfa GR Y VAC 2|
|Chemical composition, type of oil||PFPE|
|Chemical composition, solid lubricant||PTFE|
|Lower service temperature||-20°C / -4°F|
|Upper service temperature||250°C / 482°F|
|Vapor Pressure (Torr)||20°C (Torr): 4.8x10-13|
|Density at 20°C||approx. 1.9 g/cm3|
|NLGI grade, DIN 51818||2|
|Worked penetration, DIN ISO 2137, 25°C, lower limit value||265 x 0.1 mm|
|Worked penetration, DIN ISO 2137, 25°C, upper limit value||295 x 0.1 mm|
|Oil separation, based on ASTM D 6184 [FTMS 791 C 321], after 30 h/200 °C||<= 12 % by weight|
|Evaporation loss, ASTM D 2595 22h/204°C||<= 1 % by weight|
|Minimum shelf life from the date of manufacture - in a dry, frost-free place and in the unopened original container, approx.||60 months|
It is strongly recommended using all fluids and greases at the time of receipt, however when storage is necessary, rotate older stock into use first and observe the recommended parameters listed below.
Shelf Life of Klüber Grease is a minimum of 5 years; in this case although there won't be problems in terms of chemical stability there can be oil separation over time, which is normal.
All dimensions listed below, unless otherwise stated, are in grams.