Skydrol LD-4

Skydrol LD-4 was introduced in 1977 , and is well known around the world. At the time of its introduction it was a breakthrough product, solving problems of valve erosion and thermal stability common in earlier fluids. Its excellent thermal stability under real world conditions has given it a reputation as the gold standard among Type IV fluids. Skydrol LD-4 features low density, excellent thermal stability, valve erosion prevention, and deposit control.

Fluids ApplicationsAviation hydraulic fluidFire Resistant Hydraulic FluidTypical PropertiesPropertyTest MethodTypical Value, UnitsGeneralAcid Number (mg KOH/g) 0.10 MaximumAppearance Clear, oily liquidAutoignition TemperatureASTM D 2155400 °C (752 °F ) MinimumColor Purple, essentially equivalent to intensity and hue standardElemental Content      Calcium 10 ppm, Maximum     Chlorine 50 ppm, Maximum     Potassium 30 ppm, Maximum     Sodium 10 ppm, Maximum     Sulfur 1185-1540 ppmFire Point      COC 177 °C (350 °F ) MinimumFlash Point      COC 160 °C (320 °F ) MinimumMoisture 0.20 % MaximumParticle 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 MaximumPour Point -62 °C (-80 °F ) MaximumSpecific Gravity      @ 25°C/25°C 1.003-1.013Viscosity      @ 38°C (100°F) 10.65-11.65 cSt     @ -54°C (-65°F) 2000 cSt Maximum     @ 99°C (210°F) 3.66-4.00 cSt Eastman Chemical Eastman Chemical Industrial Chemicals,Fluids and Lubricants Aviation

  • Brand: : Eastman Chemical
  • Producer/Supplier : Eastman Chemical
  • Chemical Group/INCI : Fluids
  • Chemical Category : Industrial Chemicals
  • Sub Category : Fluids and Lubricants
  • Industry/Applications

    : Aviation

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