Fire-Resistant Phosphate Ester Aviation Hydraulic Fluid
Exxon HyJet IV-Aplus is a fire-resistant phosphate ester hydraulic fluid designed for use in commercial aircraft. It is the best-performing Type IV fluid and approaches to a great extent many of the performance capabilities of Type V fluids, including high temperature stability, long fluid life, low density, and rust protection. It is superior to all other Type IV fluids in these respects. Exxon HyJet IV-A plus meets the specifications of all major aircraft manufacturers and SAE AS1241.
Features and Benefits
Exxon HyJet IV-A plus offers the following key features and benefits:
|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|
Exxon HyJet IV-A plus fire-resistant aviation hydraulic fluid is used in commercial aircraft hydraulic systems where phosphate hydraulic fluids are recommended. It is compatible in all proportions with commercial Type IV and Type V phosphate ester aviation hydraulic fluids.
Exxon HyJet IV-A plus meets or exceeds the following industry and aircraft builder specifications. It is approved against all commercial aircraft manufacturer requirements and is included in their Qualified Products Lists.
Specifications and Approvals
|HyJet IV-A plus||Meets Type IV, Low density||Is in Qualified Products List|
|SAE Aerospace Standard AS1241C||X||Not Applicable|
|Boeing BMS 3-11P, Type IV, Grade B and Grade C||X||X|
|Boeing (Douglas Division) DMS 2014H, Type 4||X||X|
|British Aerospace (Avro) BAC.M.333C||X||X|
|Bombardier/Canadair BAMS 564-003A||X||X|
|Gulfstream Aerospace 1159SCH302J||X||X|
|Test Method||HyJet IV-A plus (1)||Limits|
|Kinematic Viscosity, cSt||ASTM D 445|
|at -53.9ºC (-65ºF)||1320||2000 max|
|at -26.1ºC (-15ºF)||130||135 max|
|at 37.8ºC (100ºF)||10.6||10.0 -11.0|
|at 98.9ºC (210ºF)||3.6||3.35 – 3.75|
|at 127.6ºC (260ºF)||2.6||1.5 min|
|Viscosity Index||ASTM D 2270||280|
|Shear Stability, % Viscosity Drop at 40ºC||ASTM D 5621||22|
|Specific gravity at 25ºC/25ºC (77ºF/77ºF)||ASTM D 4052||0.996||0.990 -1.002|
|Density at 15.6ºC (60ºF), g/mL (lb/gal)||ASTM D 4052||0.999 (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|
|Flash Point, ºC (ºF)||ASTM D 92||176 (349)||160 (320) min|
|Fire Point, ºC (ºF)||ASTM D 92||188 (370)||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||27/15||250/100 max|
|Sequence II||23/13||150/50 max|
|Sequence III||28/16||450/250 max|
|Chemical Elements, ppm|
|Four-Ball Wear, Scar diameter at 75ºC/600rpm/1hour, mm||Modified ASTM D 4172|
|4 kg||0.22||0.45 max|
|10 kg||0.33||0.50 max|
|40 kg||0.73||0.55 – 0.85|
|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)||33×10^-5 (0.0799)|
|Coefficient of thermal expansion, 25 to 100ºC, per ºC (per ºF)||0.00086 (0.00048)|
|Specific heat capacity at 40 ºC, cal/g/ºC (same as Btu/lb/ºF)||0.41|
|Pour Point, °F||ASTM D97 / ASTM D5950||-80|
|NAS 1638 Class, HIAC, ISO 11500||7|
|(1) Values may vary within modest ranges|
Health and Safety
Based on available toxicological information, this product is not expected to produce adverse effects on health when used and handled properly. Information on use and handling, as well as health and safety information, can be found in the Material Safety Data Sheet (MSDS) which can be obtained from your local distributor or via the Internet on http://www.exxonmobil.com/lubes
For additional technical information or to identify the nearest U.S. ExxonMobil supply source, call 1800 443-9966
It cannot be guaranteed that the product information given above is up to date. For the latest version of the Product Data Sheet we refer to the product library of ExxonMobil.