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- O-Rings These are circular seals that create a tight fit between two surfaces, preventing fluid leaks. They are usually made of durable materials such as nitrile rubber or polyurethane.

2. Back-up rings These are placed alongside O-rings to provide additional support, preventing the O-ring from extruding under pressure. This is particularly important in high-pressure applications.

4. Enhancing Efficiency Proper seals reduce the energy loss that can occur due to fluid leakage. This increased efficiency not only improves the performance of the hydraulic system but can also result in significant cost savings in terms of energy use and maintenance.