PFPE High Temperature & Ultra-high Vacuum Lubricating Oils S Grades are perfluorinated polyether inert fluids. They are especially developed for use in high temperature and ultra-high vacuum environments as lubricating Oils.
| Properties | Unit | S-2500 | S-3000 | S-3500 |
|---|---|---|---|---|
| Appearance | Clear Liquid | |||
| Kinetic Viscosity at 20℃ | cSt | 2500 | 3000 | 3500 |
| at 40℃ | cSt | 740 | 860 | 995 |
| at 100℃ | cSt | 64 | 70 | 84 |
| Density at 0°C | g/cm3 | 1.95 | 1.96 | 1.97 |
| Viscosity index | 158 | 161 | 166 | |
| Evaporation weight loss at 204 °C, 22 hr | % | ＜0.75 | ＜0.1 | ＜0.1 |
| Surface tension at 20°C | dyn/cm | 22 | 22 | 22 |
| Pour Point | ℃ | -24 | -21 | -18 |
| Working Temperature | ℃ | -24~305 | -21~315 | -18~325 |
