VM-5s
TU 38.1011187-88, amendment 1-4
VM-5s - are developed by deep cleaning from sulphurous or low-sulphurous technology of vacuum distillation, nefty with application. Vacuum VM-5 oils and VM-5s are applied as working liquid in high-vacuum paromaslyany pumps (providing lower residual pressure in vacuum systems in comparison with vacuum VM-1 and VM-1S oils), and also, in certain cases, in mechanical pumps with oil consolidation of the interfaced details.
| Index name | Norm |
|---|---|
| Kinematic viscosity mm2 /s | |
| - At 20°С | - |
| - At 50°С | 60,0-74,0 |
| - At 100°С | - |
| Acid number, mg КОН / g, not more than | 0,2 |
| Temperature, °С: | |
| - Open cup flash point, °С, not less than | 230 |
| - Pour point, not more than | -12 |
| Color, CNT units, not more than | 0,5 |
| Fractional composition of oil, °С: | |
| - The temperature of the beginning of the distillation, not less than | - |
| - 90% of the oil distilled at a temperature not higher than | - |
| Vapor pressure at 20°С, Pa, not more than | Not more than 2,7·10-5 |
| Density at 20°С, kg/m3, not more than | 900 |
