Product Overview
The Skydrol 500 series of fluids has the longest service history among phosphate ester products. The first version, Skydrol 500, was introduced in 1952. Steady improvements to the formulation led in 1977 to the current version, Skydrol™ 500B-4 which contains the same breakthrough anti erosion additive and acid scavenger found in Skydrol™ LD-4 . Skydrol 500B-4 is the most worker friendly of the aviation phosphate esters. This has given the product enormous popularity for use i
Typical Technical Properties
Product-specific technical values. Confirm current specifications with the supplier before commercial use.
| Property | Typical value | Condition | Test method / source |
|---|---|---|---|
| Property | Test Method | Typical Value, Units | |
| Autoignition Temperature | ASTM D 2155 | 460 °C (860 °F ) Minimum |
Product Identity
| Chemical name | Fluids |
|---|
Applications
Application areas documented for this product grade.
Aviation hydraulic fluid
Fire Resistant Hydraulic Fluid
Processing & Availability
- Additional product information
- General
- Additional product information
- Acid Number (mg KOH/g) | | 0.10 Maximum
- Additional product information
- Appearance | | Clear, oily liquid
- Additional product information
- Color | | Purple, essentially equivalent to intensity and hue standard
- Additional product information
- Elemental Content
- Additional product information
- Calcium | | 10 ppm, Maximum
- Additional product information
- Chlorine | | 50 ppm, Maximum
- Additional product information
- Potassium | | 30 ppm, Maximum
- Additional product information
- Sodium | | 10 ppm, Maximum
- Additional product information
- Sulfur | | 1185-1460 ppm
- Additional product information
- Fire Point
- Additional product information
- COC | | 191 °C (375 °F ) Minimum
- Additional product information
- Flash Point
- Additional product information
- COC | | 177 °C (350 °F ) Minimum
- Additional product information
- Moisture | | 0.20 % Maximum
- Additional product information
- Particle Contaminationa
- Additional product information
- 15-25 micron size | | 5,700 Maximum
- Additional product information
- 25-50 micron size | | 1,012 Maximum
- Additional product information
- 50-100 micron size | | 180 Maximum
- Additional product information
- 5-15 micron size | | 32,000 Maximum
- Additional product information
- Over 100 micron size | | 32 Maximum
- Additional product information
- Pour Point | | -62 °C (-80 °F ) Maximum
- Additional product information
- Specific Gravity
- Additional product information
- @ 25°C/25°C | | 1.050-1.062
- Additional product information
- Viscosity
- Additional product information
- @ 38°C (100°F) | | 11.40-12.40 cSt
- Additional product information
- @ -54°C (-65°F) | | 2900 cSt Maximum
- Additional product information
- @ 99°C (210°F) | | 3.68-4.00 cSt |
Technical Documents & Source References
No technical PDF is referenced in the source record for this product.