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Hydraulic cylinder seals are seals that are used between parts in a hydraulic system to prevent fluid leakage.They are critical aspects of hydraulic systems.

Learn the difference between hydraulic and oil seals, their applications, and how to choose the right seal for your industrial equipment.

Understanding the classification of hydraulic seals and choosing the best material is crucial for ensuring long-lasting performance in demanding applications. In this guide, XHH Seals explores different types of hydraulic seals and compares materials like PU, PTFE, NBR, and FKM to help you make the right selection for your hydraulic systems.

Discover the most common hydraulic seals—rod seals, piston seals, wipers, O-rings, and more. Learn their key functions and how to choose the right one for your system.

Discover how PolyPak seals outperform traditional lip seals in hydraulic systems. Learn about types, applications, and OEM solutions from XHH Seals.

Discover what a wiper seal is, its types, functions, and industrial applications. Learn how XHH Seals provides OEM wiper seal solutions with PU, FKM, and PTFE materials.

What Is a PolyPak Seal A PolyPak seal is a composite hydraulic seal consisting of:A polyurethane (PU) sealing lip An elastomer O-ring energizer (NBR or FKM)It is widely used in hydraulic cylinders for both rod sealing and piston sealing applications. In engineering terms, it is also called:O-ring energized lip seal Composite hydraulic sealPolyPak Seal Structure & Working Principle Structure A typical PolyPak seal includes:Outer sealing element: PU lip Inner energizer: O-ring...

Quick Answer If you are evaluating rod or piston seals for a hydraulic cylinder, the decision depends on your system's pressure dynamics and reliability requirements:For superior low-pressure sealing & vacuum conditions: Choose PolyPak seals. For high-stability under pressure fluctuations & shock loads: Choose PolyPak seals. For cost-sensitive, simple pneumatic or steady low-pressure systems: Choose U-cup seals.Engineering Consensus: In the majority of heavy-duty hydraulic...