The "VG" stands for Viscosity Grade, which measures the fluid's resistance to flow at a standard temperature of 40°C. Applications and Industry Use The versatility of ISO 68 hydraulic oil makes it a preferred choice across numerous sectors.
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An ISO 68 grade is often considered a middle ground, offering low enough viscosity for efficient flow and energy conservation in pumps and valves, while remaining thick enough to maintain a protective film thickness under load. These additives are crucial for: **Anti-wear protection:** Forming a resilient film on metal surfaces to minimize friction and prevent scoring, even under high pressure.
Furthermore, compatibility with system seals and hoses must be verified. **Air release and demulsibility:** Ensuring that air is quickly released from the fluid and that water separates efficiently, preventing aeration and emulsification that can damage pumps.
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Choosing the correct viscosity is paramount; a fluid that is too thin can lead to increased internal leakage and wear, while one that is too thick creates excessive friction, heat generation, and reduced pump efficiency, potentially leading to system failure. These characteristics combine to protect critical components, extend oil drain intervals, and maintain system cleanliness.
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