Product Description
Mobil Aero HFA is formulated for aircraft systems where use of hydrocarbon-based hydraulic fluids is required. It is a low viscosity, high VI (viscosity index) fluid with excellent low temperature properties, good anti-wear performance, and good chemical stability. Mobil Aero HFA is composed of mineral base oil stock and contains shear-stable VI improvers.
Features and Benefits
Mobil Aero HFA aviation hydraulic fluid is designed to meet the demanding requirements of commercial and military aircraft applications. This high quality formulation has a long history of excellent performance and provide long, trouble-free service over a wide range of operating conditions. Product features and potential benefits include:
Features |
Advantages and Potential Benefits |
| High Viscosity Index (VI) | Allows equipment operation over a wide range of temperatures |
| Excellent low temperature properties | Provides high performance operation in low ambient conditions |
| Good chemical and oxidation stability | Resists the formation of acidic constituents, varnishes, and deposits |
Applications
Mobil Aero HFA is a premium quality fluid that meets the requirements of the U.S. Military specification MIL-H-5606A (now obsolete). It has a very high VI and is suitable for use at temperatures down to -54ºC (-65ºF). While this quality fluid is no longer used by the U.S. Military, it is still used in some older, small private, and commercial aircraft. It is also used in industrial and commercial equipment requiring good fluidity at very low temperatures, where it provides long, trouble-free service over a wide range of operating conditions.
Specifications and Approvals
Military Specification |
HFA |
| MIL-H-5606A (obsolete) | X |
Typical Properties
|
HFA |
| Color | Red |
| Gravity, API | 29 |
| Specific Gravity, 60ºF/60ºF | 0.882 |
| Pour Point, ºC | -60 max |
| Flash Point, COC, ºC | 93 min |
| Flash Point, PMCC, ºC | - |
| Acid Number, mg KOH/g | 0.03 (0.2 max) |
| Barium Content, ppm | - |
| Kinematic Viscosity, cSt | |
| @ 205ºC | - |
| @ 100ºC | 5.1 |
| @ 40ºC | 13.9 |
| @ -40ºC | 460 (500 max) |
| @ -54ºC | 1950 |
| @130ºF | 10.7 (10.0 min) |
| Viscosity Index | 370 |
| Low Temperature Stability | |
| 72 hours at -54ºC | Pass |
| 72 hours at -40ºC | - |
| Copper Corrosion, 72 hours at 135ºC | 2e max |
| Oxidation Corrosion Stability 168 hours at 135ºC | Pass |
| Water Content, ppm | 50 (100 max) |
| 4-Ball Wear Scar, mm 1hour, 1200 rpm, 75ºC, 40 kg | 0.8 (1.0 max) |
| Evaporation Loss, wt % | |
| 6 hours at 71ºC | 15 (20 max) |
| Foam, ASTM D892 Seq I, mL/mL | 30/0 (65/0 max) |
| Nitrile Rubber L Swell, % 168 hours at 70ºC | 19.0 to 30.0 |
| Shear Stability, ASTM D 2603 Option B, % Loss in KV at 40 ºC | 15 max |
| Bulk Modulus, psi Isothermal Secant at 40ºC, 4,000 psig | 200,000 min |
Health and Safety
MOBIL AERO HFA is manufactured from high quality petroleum base stocks, carefully blended with selected additives. As with all petroleum products, good personal hygiene and careful handling should always be practiced. Avoid prolonged contact to skin, splashing into the eyes, ingestion or vapour inhalation. Please refer to our Imperial Oil Material Safety Data Sheet for further information.
Note: This product controlled under Canadian WHMIS legislation as Flammable Material, Class B3.
The ExxonMobil logotype, Mobil and Aero HF are trademarks of ExxonMobil Corporation, or one of its subsidiaries. © 2003 Exxon Mobil Corporation.
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