Aviation
Polysiloxane-ester aviation hydraulic fluid · -60 °C to +175 °C
A high-performance aviation hydraulic fluid formulated from a blend of polysiloxane fluid and organic ester with an anti-wear additive and oxidation inhibitors. It exhibits much-improved anti-wear performance, low evaporation rate, high lubricating properties, high thermo-oxidative stability and excellent resistance to foaming.
Best used in aircraft hydraulic systems, including those of the MiG-25 and MiG-29. Used across a wide temperature range from -60 °C to +175 °C, with the possibility of short-term overheating up to 200 °C. Permissible working pressure in the hydraulic system up to 21 MPa.
| Property | Typical |
|---|---|
| Appearance | Yellow clear oil |
| Viscosity at 200 °C, cSt | 1.35 |
| Viscosity at 20 °C, cSt | 24.0 |
| Viscosity at -60 °C, cSt | 2420 |
| Flash point, COC, °C | 204 |
| Pour point, °C | -72 |
| Acid number, mg KOH/g | 0.025 |
| Thermo-oxidative stability, 200 °C / 30 h | |
| Viscosity after oxidation at 200 °C, cSt | 1.5 |
| Viscosity after oxidation at 20 °C, cSt | 26.0 |
| Viscosity after oxidation at -60 °C, cSt | 4200 |
| Corrosion (steel 30HGSA, duralumin D16A TV, bronze BrAZh 9-4) | None |
Typical values shown do not constitute a specification. The information is based on current knowledge and is intended to describe the product for possible applications; it does not release the user from performing preliminary tests.