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Technical Data Sheet
Skydrol® 5 Hydraulic Fluid

  • Aviation hydraulic fluid

Product Description

Introduced in 1996, Skydrol 5 was the first Type V fluid qualified under the Boeing BMS 3-11 specification. Skydrol 5 offers higher temperature capability than Type IV fluids, the lowest density, and better paint compatibility. Skydrol 5 does not have universal air frame manufacturer approval, so consult Eastman's Skydrol Technical Service (800-260-4150) for specific approval and application information.

Typical Properties

PropertyTest MethodTypical Value, Units
Acid Number (mg KOH/g) 0.10 Maximum
Appearance Clear, oily liquid
Autoignition TemperatureASTM D 2155399 °C (750 °F ) Minimum
Color Purple, essentially equivalent to intensity and hue standard
Elemental Content 
     Calcium 10 ppm, Maximum
     Chlorine 50 ppm, Maximum
     Potassium 30 ppm, Maximum
     Sodium 10 ppm, Maximum
     Sulfur 1185-1540 ppm
Flash Point 
     COC 154 °C (310 °F ) Minimum
Moisture 0.20 % Maximum
Particle Contaminationa 
     15-25 micron size 5,700 Maximum
     25-50 micron size 1,012 Maximum
     50-100 micron size 180 Maximum
     5-15 micron size 32,000 Maximum
     Over 100 micron size 32 Maximum
Pour Point -62 °C (-80 °F ) Maximum
Specific Gravity 
     @ 25°C/25°C 0.970-0.980
     @ 38°C (100°F) 9.00-9.84 cSt
     @ -54°C (-65°F) 2600 cSt Maximum
     @ 99°C (210°F) 3.01-3.41 cSt

aNAS 1638 particle counts per AS4059F

Eastman and its marketing affiliates shall not be responsible for the use of this information, or of any product, method, or apparatus mentioned, and you must make your own determination of its suitability and completeness for your own use, for the protection of the environment, and for the health and safety of your employees and purchasers of your products. No warranty is made of the merchantability of fitness of any product, and nothing herein waives any of the Seller's conditions of sale.

2/28/2018 11:35:39 AM