Mobil HyJet V

Exxon HyJet V is a Type V fire-resistant phosphate ester hydraulic fluid, which is superior in thermal and hydrolytic stability to commercially available Type IV hydraulic fluids. Better stability means the extent of fluid degradation in aircraft systems will be less than Type IV fluids, in-service fluid life will be longer, and aircraft operator maintenance costs will be lower.

HyJet V provides excellent high and low temperature flow properties (kinematic viscosities) and rust protection. HyJet V has also demonstrated an improvement over the erosion protection performance afforded by Type IV fluids.

 

Exxon HyJet V offers the following key features and benefits:

Features	Advantages and Potential Benefits
Higher stability than Type IV fluids	Longer fluid life, Lesser need to replace fluid due to degradation, Reduced hydraulic system maintenance costs
Meets Boeing BMS 3-11 and SAE AS1241 Type IV and Type V requirements	Improved flammability characteristics over meeting just the Type V requirements
Low density	Reduced weight of the hydraulic fluid carried by aircraft, Reduced aircraft fuel consumption, Lower operating costs
Excellent rust protection	Reduced risk of equipment damage in the event of major water contamination
Excellent low and high temperature viscosity balance	Precise hydraulic system control and response even during extended range/polar flights, Longer aircraft hydraulic system equipment life
Excellent deposit control	Longer aircraft hydraulic system equipment life, Reduced maintenance costs
Improved protection against electro-chemical corrosion (erosion)	Protection against servo valve and pump damage
Fully compatible with all approved Type IV and Type V phosphate ester hydraulic fluids	Flexibility in use by airline operators

Applications

Exxon HyJet V is designed for use in commercial aircraft phosphate ester hydraulic systems. It meets the SAE AS1241 requirements and is included in the Airbus/ATR NSA307110, Boeing BMS 3-11, Boeing-Long Beach DMS 2014, and Bombardier Canadair BAMS 654-003 Qualified Products Lists. It is compatible in all proportions with commercial Type IV and Type V phosphate ester aviation hydraulic fluids.

Specifications and Approvals

HyJet V	Meets	In Qualified Products List
SAE Aerospace Standard AS1241, Type V	X	Not Applicable
Airbus NSA 307110M, Type V	X	X
Boeing BMS 3-11N Type V, Grade A	X	X
Boeing-Long Beach DMS 2014H Type 5	X	X
Bombardier BAMS 654-003NC, Type V^	X	X
ATR NSA307110M, Type V	X	X
^Consult Aircraft Maintenance Manual for use in specific aircraft model.

Typical Properties

	Test Method	HyJet V (1)	Limits
Kinematic Viscosity, cSt	ASTM D 445
at -53.9ºC (-65ºF)		1360	2000 max
at 37.8ºC (100ºF)		10.7	10.0 - 11.0
at 98.9ºC (210ºF)		3.7	3.35 - 3.75
Viscosity Index	ASTM D 2270	280
Shear Stability, % Viscosity Drop at 40ºC	ASTM D 5621	21
Pour Point, ºC (ºF)	ASTM D 97	‹-62 (-80)	-62 (-80) max
Specific Gravity at 25ºC/25ºC (77ºF/77ºF)	ASTM D 4052	0.997	0.993 -1.005
Density at 15.6ºC (60ºF), g/mL (lb/gal)	ASTM D 4052	1.000 (8.35)
Acid Number, mg KOH/g	ASTM D 974	0.05	0.1 max
Water, Karl Fischer, mass %	ASTM D 6304	0.09	0.2 max
Flammability
Flash Point, ºC (ºF)	ASTM D 92	171 (340)	160 (320) min
Fire Point, ºC (ºF)	ASTM D 92	182 (360)	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		20/14	250/100 max
Sequence II		20/13	150/50 max
Sequence III		20/15	450/250 max
Particle Count, NAS 1638 Class	Auto Counter	4	7 max
Chemical Elements, ppm
Calcium		5	20 max
Potassium		37	48 max
Chlorine		8	50 max
Sodium		1	15 max
Sulfur		55	200 max
Electrical Conductivity at 20ºC, microSiemens/cm		0.4	0.3 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 at 40 ºC, cal/g/ºC (same as Btu/lb/ºF)		0.42
(1) Values may vary within modest ranges