Where Is ISO VG 68 Hydraulic Oil Used?
ISO VG 68 hydraulic oils can be used in certain hydraulic and circulation systems requiring higher viscosity. However, the approach that 'thicker oil provides better protection' is incorrect; the viscosity range for which the system was designed should be considered.
What does ISO VG 68 mean?
ISO VG 68 indicates that the kinematic viscosity of the oil at 40°C falls into group 68 in the ISO classification. Products within the same class may have different base oils and additive technologies.
The difference with ISO VG 46
VG 68 has a higher viscosity than VG 46. This can be an advantage in some systems requiring hotter temperatures or higher film thicknesses; however, it can be a disadvantage in terms of cold start-up and energy losses.
Areas of application
For certain presses permitted by the manufacturer, heavy-duty hydraulic units, some circulation systems, and equipment operating in hot environments, the VG 68 class may be preferred. Pump inlet conditions and minimum operating temperature must be checked.
Things to consider during oil change
The viscosity of the existing oil, the base oil type, and the additive technology must be verified. Tank cleanliness, filter condition, and the amount of old oil remaining in the system can affect transition performance.
Conclusion
ISO VG 68 may be the right choice for certain systems; however, using a higher viscosity than the system's design viscosity does not automatically provide better protection.
For product selection, application evaluation, and technical support, you can contact GataMerk Industrial via info@gatamerk.com.
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