Gold Syn Fluid HSO

GOLD Syn Fluid HSO series oils are high performance fully synthetic ester type, fire- resistance hydraulic fluid. The products are based on synthetic, readily biodegradable esters. A high-performance, carefully selected additive package provides excellent anti-wear and extreme pressure (EP) properties as well as good thermal stability and corrosion protection. Inherently strong oxidation resistance helps to prevent gumming and deposit formation even at high temperatures. Because of the high natural VI of the base fluid and low pour point, the viscosity-temperature behaviour allows for a very wide operating temperature range.

  • Good oxidation stability and ageing resistance
  • High viscosity index and low pour point
  • Excellent anti-wear/EP properties
  • Rapid air release and low foaming
  • Excellent corrosion protection for steel and non ferrous metals
  • Optimum demulsification characteristics
  • Good compatibility with sealing materials
Test Properties & Technical Specification
HSO Grade 405 406 407
Appearance Bright & Clear Bright & Clear Bright & Clear
Colour 0.5 Max 0.5 Max 0.5 Max
Viscosity, Kinematic 40 at°C, cSt 30 – 34 43 – 49 65 – 70
Pour Point, °C -30 Max -30 Max -30 Max
Viscosity Index 140 Min 140 Min 140 Min
Pour Point, °C -36 Max -36 Max -30 Max
Flash Point, COC, °C 230 Min 240 Min 250 Min
TAN, mg KOH/g 0.05 Min 0.05 Min 0.05 Min
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