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.
| 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 |
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