The oil was vacuum-6 BM (20L).
vacuum oil
Description
Vacuum oil VM-6 – is well refined mineral oil used as the lubricating oil, and as a seal for reciprocating fore pumps. It used as the working fluid in the fore-vacuum reciprocating and rotary vane pumps. Oil VM-6 compared to BM-4 made oil has a narrower fractional composition, enhanced (3-4 fold) oxidative stability and moisture resistance, and less dependence of viscosity on temperature.
Applications
When using HMW-6 oil instead of BM-4 starting power the pump motor is reduced by about 30%, and the power consumed by the motor at a residual pressure is reduced to 10%.
Specifications
| Indicator | Norm |
|---|---|
| Density at 20 ° C, g /cm3, not more than | – |
| The color units. CNT, not more than | 4,5 |
| Kinematic viscosity mm2 /s: | |
| at 20 ° C, not more than | 220 |
| at 50 ° C, not more than | 40 |
| at 100 ° C, not more than | 8 |
| Flashpoint, ° C: | |
| COC | is not normalized |
| in a closed crucible, not lower | 216 |
| Acid number, mg KOH /g, not more than | – |
| Coking ability,%, not more than | – |
| Pour Point, ° C, max | -10 |
| Stability against oxidation: | |
| Acid number, mg KOH /g, not more than | – |
| increase in viscosity at 50 ° C, not more than | 50 |
| Fractional composition: | |
| starting the distillation temperature, ° C, min | 125 |
| 90% oil is distilled at a temperature, ° C, max | 220 |
| Water content,% | The lack |
| Vapor pressure at 20 ° C, Pa, no more than | 4,0? 10-4 |
| Boiling point, ° C, at which the vapor pressure is 1.33 Pa | – |
Additional information
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