Understanding the viscosity index of a hydraulic oil

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Viscosity Index 

          The viscosity index is a value that indicates the change in oil viscosity when the temperature changes. Under normal circumstances, oil will have a lower viscosity when the temperature increases and become more viscous when the temperature decreases. These different viscosity index values will affect the performance of the machine in different conditions. 

 

What are the differences between low viscosity index oil and high viscosity index oil? 

Low viscosity index oil 

  • Viscosity changes rapidly with temperature, which can interrupt the operation of the machine if the temperature fluctuates. 

  • Can cause premature wear to the hydraulic system due to the inability to maintain proper viscosity. 

  • Not suitable for applications that are exposed to fluctuating temperatures, such as outdoor applications that endure both hot and cold conditions. 

High viscosity index oil 

  • Maintains viscosity well even when the temperature fluctuates, providing stability to the operation of the hydraulic system 

  • Reduces machinery wear, extending the service life of the hydraulic system. 

  • Has high heat resistance, reducing the formation of air bubbles and enhancing the performance of the hydraulic system. 

  • Suitable for heavy machinery that operates continuously, such as equipment used in the construction, mining, and agricultural industries. 

 

PTT Lubricants presents 'HYDRAULIC HVI' 

          HYDRAULIC HVI from PTT Lubricants is a superior hydraulic fluids formulated with high quality Viscosity Index Improver (VII) to maintain viscosity in a broad temperature range. HYDRAULIC HVI provides excellent anti-wear protection and deposit formation resistance in high pressure and temperature conditions. 

 

Applications of HYDRAULIC HVI 

  • Outstanding wear and corrosion protection helps extend component life, enable extra long oil and filter life.  

  • Outstanding thermal and oxidation stability helps reduce deposit and provide better system cleanliness resulting in cost and maintenance downtime reduction. 

  • High viscosity index provides excellent component protection over a wide range of temperature. 

Superiority of HYDRAULIC HVI 

  • Suitable for use in mobile, construction and agricultural hydraulic systems.  

  • Designed for use in hydraulic systems subjected to wide variations in operating temperatures. 

 

Learn more product details at: https://pttlubricants.pttor.com/en/product_trading/0/0/0/30 

 

If you are looking for a hydraulic oil that can maintain the efficiency of your machine and support all applications, HYDRAULIC HVI is the best choice for you! 

 

For purchase inquiries, please contact 092-252-7666 or 089-924-6908. 

For product inquiries with PTT Lubricants Solutions Team, please contact 02-239-7847. 

 

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