RU / EN
GOST (national standard): 13076-86
VNII NP-50-1-4F is defined as synthetic oil with additives which enhance anti-wear properties and thermo-oxidative stability
VNII NP-50-1-4F is used in turbojet aircraft engines, which have outlet temperature up to 175°C (civil aviation airplanes Il-96-300, Tu-204, Yak-42, An-74, An-124 Ruslan aircraft military aircraft An-72, MiG-21, MiG-23, MiG-27, Su-15, Su-17, Su-20, Su-24, Su-25, Su-27, Tu-22, Mi-26). Oil VNIINP-50-1-4F is used also in turbo-alternator of air conditioning systems LA and in aviation gas-turbine engines of gas-compressor units.
Properties:
| Indicator name | Norm |
| Kinematic viscosity, mm2/s (St): | |
| at 100°C, not less | 3,2 |
| at - 40°C, not more | 2000 |
| at - 54(50)°C, not more | 11000 |
| The flash point determined in open crucible °C, not below | 204 |
| Solidification temperature, °C, not above | -60 |
| Thermal-oxidative stability and corrosivity at 175°C for 72 hours: |
|
| a) weight corrosion index after oxidation, mg/cm2, on LP: | |
| of steel grade SHGS (HOST-71), aluminium alloy de-formed brand AK4(GOST 4784-74), magnesium alloy m-s brand 5 Ml (GOST 2856-79) and silver (GOST 6836-72) | ±0,2 |
| copper M1 (GOST 859-78) | ±0,4 |
| b) acid number after oxidation, mg KOH per 1 g of oil not more | 2,0 |
| C) the change of viscosity after oxidation, determined at 100°C, %, not more | 7 |
| g) the appearance of the oil after oxidation | transparent, no sediment on standing |
| d) the condition of the appliance and plates after oxidation | the lack of deposits |
| Thermal-oxidative stability at 175°C for 50 hours and the air (10±0,5) dm3/h: |
|
| a) mass fraction of precipitate insoluble in isooctane, %, not more | 0,3 |
| b) acid number after oxidation, mg KOH/g oil not more than | 0,4 |
| C) kinematic viscosity after oxidation: | 0,4 |
| at minus 40°C, mm2/s (St), not more | 3500 |
| at 100°C, mm2/s (St), not more | ±2,0 |
| d) weight corrosion index after oxidation, g/dm2, and the plates from: | |
| alloy wrought aluminium brand AK4 (GOST 4784-74), max. | ±2,0 |
| of copper grade M1 or M2(GOST 859-78), max. | ±1,5 |
| steel SH-15 (GOST 801-78) | Lack |
| Warranty period of storage | 5 years |