VM-4
TU 38.401-58-3-90, amendment 1-6
VM-4 oil - is applied as working liquid in forvacuum piston and lamellar and rotor pumps. VM-4 oil represents well purified mineral (oil) oil.
| Index name | Norm |
|---|---|
| Kinematic viscosity mm2 /s | |
| - At 20°С | 48-57 |
| - At 100°С | 8-11 |
| Acid number, mg КОН / g, not more than | 0,2 |
| Temperature, °С: | |
| - Open cup flash point, °С, not less than | 235 |
| - Pour point, not more than | -15 |
| Color, CNT units, not more than | 7,0 |
| Fractional composition of oil, °С: | |
| - Temperature of the beginning of the distillation, not less than | 370 |
| - 90% of the oil distilled at a temperature not higher than | - |
| - The end of the boil, not more than | 515 |
| Vapor pressure at 20°С, Pa, not more than | 5,3·10-3 |
| Density at 20°С, kg/m3, not more than | 908 |
