Features Advantages and Potential Benefits
- Best in high temperature stability among Type IV fluids Longer fluid life
- Lesser need to replace fluid due to degradation
- Reduced hydraulic system maintenance costs
- Lowest density Type IV fluid Reduced weight of the hydraulic fluid carried by aircraft
- Reduced aircraft fuel consumption, lower operating costs
- Effective rust protection Reduced the risk of equipment damage in the event of major water contamination
- Excellent low temperature flow (viscosity) properties Precise hydraulic system control and response even during extended range/polar flights
- Longer equipment life
- Excellent deposit control Longer equipment life
- Reduced maintenance costs
- Excellent protection against electro-chemical corrosion (erosion) Protection against servo valve and pump damage
- Approved by all major aircraft manufacturers Use as fleet lubricant by airline operators
- Fully compatible with all approved phosphate ester hydraulic fluids Flexibility in use by airline operators
Application
Exxon HyJet IV-Aplus fire-resistant aviation hydraulic fluid is used in commercial aircraft hydraulic systems where phosphate hydraulic fluids are recommended. Exxon HyJet IV-Aplus meets or exceeds the following industry and builder specifications. It is approved against the aircraft manufacturer requirements and is included in their Qualified Products Lists.
Specifications and Approvals
- SAE Aerospace Standard AS1241
- Airbus NSA307110
- ATR
- Boeing (Heritage) BMS 3-11
- Boeing (Douglas Division) DMS 2014
- British Aerospace (Avro) BAC.M.333C
- Bombardier/Canadair BAMS 564-003
- Bombardier/DeHavilland
- Cessna
- Embraer
- Fokker
- Gulfstream Aerospace 1159SCH302D
- Lockheed C-34-1224C
Typical Properties
|
Test Method |
Results |
Limits |
| Kinematic Viscosity, cSt | ASTM D 445 | | |
| at -53.9ºC (-65ºF) | | 1320 | 2000 max |
| at 37.8ºC (100ºF) | | 10.55 | 10.0 -11.0 |
| at 98.9ºC (210ºF) | | 3.57 | 3.35 - 3.75 |
| Viscosity Index | ASTM D 2270 | 320 | |
| Shear Stability, % Viscosity Drop at 40ºC | ASTM D 5621 | 22 | |
| Pour Point, ºC (ºF) | ASTM D 97 | <-62 (-80) | -62 (-80) max |
| Specific gravity at 25ºC/25ºC (77ºF/77ºF) | ASTM D 4052 | 0.996 | 0.993 -1.005 |
| Density at 15.6ºC (60ºF), g/mL (lb/gal) | ASTM D 4052 | 1.001 (8.35) | |
| Acid Number, mg KOH/g | ASTM D 974 | 0.04 | 0.1 max |
| Water, Karl Fischer, mass % | ASTM D 6304 | 0.1 | 0.2 max |
| Flammability | | | |
| Flash Point, ºC (ºF) | ASTM D 92 | 174 (346) | 160 (320) min |
| Fire Point, ºC (ºF) | ASTM D 92 | 185 (365) | 177 (350) min |
| Autoignition Point, ºC (ºF) | ASTM D 2155 | >427 (800) | 400 (752) min |
| Foaming Tendency/Stability, mL foam/sec to collapse | ASTM D 892 | | |
| Sequence I | | 0/0 | 100/100 max |
| Sequence II | | 0/0 | 75/50 max |
| Sequence III | | 0/0 | 100/250 max |
| Particle count, NAS 1638 Class | Auto Counter | 4 | 7 max |
| Chemical Elements, ppm | | | |
| Calcium | | 110 | 120 max |
| Potassium | | 37 | 48 max |
| Chlorine | | 7 | 50 max |
| Sodium | | 0 | 15 max |
| Sulfur | | 220 | 350 max |
| Electrical Conductivity at 20ºC, microSiemens/cm | | 1.4 | 0.5 min |
| Bulk Modulus, Isothermal secant at 100ºF/3000 psi, psi | | 210,000 | |
| Thermal Conductivity at 40ºC, cal/sec/cm2/ºC (Btu/hr/ft2/ºF) | | 33x10-5 (0.0799) | |
| Coefficient of thermal expansion, 25 to 100ºC, per ºC (per ºF) | | 0.00086 (0.00048) | |
| Specific heat capacity, cal/g/ºC (same as Btu/lb/ºF) | | 0.41 | |
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