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Back-up Ring Material
Back-up rings are essential components in hydraulic and pneumatic systems, designed to prevent seal extrusion under high pressure. The material selection for back-up rings is crucial for their performance and durability. Common materials include polytetrafluoroethylene (PTFE), which offers excellent chemical resistance, low friction, and high-temperature tolerance. PTFE is ideal for applications involving aggressive chemicals and extreme temperatures. Nylon is another popular choice, known for its high mechanical strength, wear resistance, and ability to withstand significant pressure. In some cases, high-performance plastics like PEEK (polyether ether ketone) are used for their exceptional strength and thermal stability. The chosen material must be compatible with the system’s operating conditions, including pressure, temperature, and the type of fluid used, to ensure reliable and long-lasting performance.
