Oil B-3V (TС 38.101295-85) – synthetic oil with a pentaerythritol and fatty acids ester base and a complex of additives. B-3B oil has high lubricating properties. Disadvantage: deposition of the extreme pressure additive at low operating temperature as a result of oxidation, followed by dissolution of the precipitate in oil at 70-90°C.
Used in gas turbine engines, helicopter reducers and other equipment with an oil temperature at the outlet of the engine up to 200°C.
Physical and chemical indicators of B-3V oil
| Name of the indicator | Norm GOST (TC) |
|---|---|
| Appearance | Clear liquid of light yellow to brown colour |
| Kinematic viscosity, mm2/s: | |
| at 100°С, not less | 5,0 |
| at -30°С, not more | 3500 |
| at -40°С, not more | 12500 |
| at -54°С, not more | - |
| Temperature, °С: | |
| flash point in the open crucible, not less | 235 |
| pour point, °C, not more | -60 |
| Acid number, mg KOH/g | 4,4-5,5 |
| Content: | |
| water-soluble acids, alkalis, mechanical impurity, water | Absence |
| Thermal Oxidative Stability, h (temperature, °С) | 10(200) |
| Indicators after oxidation: | |
| Kinematic Viscosity, mm2/s, not more: | |
| at 100°С | 6,0 |
| at -40°С | 20000 |
| Change in kinematic viscosity at 100°С, not more | - |
| Acid number, mg KOH/g | 0,7-2,0 |
| Mass fraction of a deposit, insoluble in an isooctane, %, not more | 0,11 |
| Corrosion on plates, g/m2, not more: | |
| ShH-15 steel | Absence |
| M1 or M2 copper | - |
| AK-4 aluminum alloy | Absence |
| Coking capacity, %, not more, | 0,45 |
| Density at 20°С, kg/m3 | 990-997 |
| Tribological characteristics on ChShMT at (20±5)°C: | |
| critical loading, N, not less | 890 |
| wear indicator at axial load of 196 N, not more | - |