VM-1s
TU 38.1011187-88, amendment 1-4
VM-1s - is applied as working liquid in high-vacuum paromaslyany pumps, in mechanical vacuum pumps with oil consolidation. The most important indicators for operation of VM-1 oils and VM-1s are viscosity, boiling temperature with a residual pressure of 0,01 mm hg, pressure of saturated steam at 20 °C. VM-1 oil and VM-1s - is interchanged.
| Index name | Norm |
|---|---|
| Kinematic viscosity mm2 /s | |
| - At 20°С | 60-70 |
| - 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: | |
| - Temperature of the beginning of the distillation, not less than | - |
| - 90% of the oil distilled at a temperature not higher than | - |
| - The end of the boil, not more than | - |
| Vapor pressure at 20°С, Pa, not more than | 5,3·10-6 |
| Density at 20°С, kg/m3, not more than | 900 |
