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kluberalfa gr y va

Homepage > products > klüber > kluberalfa gr y va
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  • chemicals and solvents
    • KLUBERALFA GR Y VA

    kluberalfa gr y va

    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.

    • Klüberalfa GR Y VAC are preferred greases for applications under vacuum, e.g. in components of the electro-mechanical industry. Behaviour 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.
    • Low evaporation even under ultra-high vacuum
    • High thermal stability
    • Good resistance to aggressive media
    • Neutral towards plastic materials
    Characteristics  Klüberalfa GR Y VAC 1 Klüberalfa GR Y VAC 2 Klüberalfa GR Y VAC 3
    Article number 090188 090189 090190
    Composition, solid lubricant PTFE PTFE PTFE
    Composition, type of oil PFPE PFPE PFPE
    Colour space white white white
    Texture homogeneous homogeneous homogeneous
    Service temperature, lower limit  -20 °C -20 °C -20 °C
    Service temperature, upper limit 250 °C 250 °C 250 °C
    Density, Klüber method: PN 024, 20°C approx. 1.94 g/cm³ approx. 1.98 g/cm³ approx. 1.99 g/cm³
    Vapour pressure, 100°C ≤ 6.71x 10⁻⁸ hPa 6.71 x 10⁻⁸ hPa ≤ 6.71 x 10⁻⁸ hPa
    NLGI grade, DIN 51818 1 2 3
    Worked penetration, DIN ISO 2137 / ASTM D217, 25°C, lower limit 310 0.1 mm 265 0.1 mm 220 0.1 mm
    Worked penetration, DIN ISO 2137 / ASTM D217, 25°C, upper limit 340 0.1 mm 295 0.1 mm 250 0.1 mm
    Oil separation, ASTM D6184, based on standard, 30 h, 200°C ≤ 14 % by weight ≤ 12 % by weight ≤ 10 % by weight
    Evaporation loss, ASTM D2595, 22 h, 204°C  ≤ 1 % by weight ≤ 1 % by weight ≤ 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 60 months 60 months

     

    kluberalfa-gr-y-vac.pdf