PEEK backup rings are designed for high-pressure and high-temperature environments, with a pressure limit of up to 20,000 psi and a maximum temperature of 500°F. These rings are chemically compatible with various substances and exhibit low friction, making them ideal for demanding applications. Compared to PTFE backup rings, PEEK offers significantly higher pressure resistance, though PTFE can handle slightly higher temperatures (up to 575°F). The choice between PEEK and PTFE depends on the specific requirements of the application, balancing pressure, temperature, and chemical resistance needs.
Key Points Explained:
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Pressure Limits for PEEK Backup Rings
- PEEK backup rings can withstand pressures up to 20,000 psi, making them suitable for extremely high-pressure applications.
- This is significantly higher than PTFE backup rings, which max out at 5,800 psi (filled) or 3,600 psi (virgin).
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Temperature Limits for PEEK Backup Rings
- The maximum operating temperature for PEEK is 500°F, which is slightly lower than PTFE’s 575°F.
- Despite this, PEEK remains a top choice for high-temperature environments due to its superior pressure resistance and mechanical stability.
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Chemical Compatibility and Friction Properties
- PEEK is chemically compatible with a wide range of substances, ensuring durability in harsh environments.
- Its low friction reduces wear and tear, enhancing longevity in dynamic applications.
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Comparison with PTFE Backup Rings
- PTFE excels in higher-temperature (575°F) but lower-pressure (3,600–5,800 psi) scenarios.
- PEEK is better suited for high-pressure (20,000 psi) and moderately high-temperature (500°F) conditions.
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Application Considerations
- For high-pressure systems (e.g., oil and gas, hydraulic systems), PEEK is the preferred material.
- If temperature is the primary concern and pressure is moderate, PTFE may be more appropriate.
Have you considered how these properties align with your specific operational conditions? The right choice depends on balancing pressure, temperature, and chemical exposure—factors that quietly shape the efficiency and safety of industrial systems.
Summary Table:
| Property | PEEK Backup Rings | PTFE Backup Rings |
|---|---|---|
| Max Pressure | 20,000 psi | 3,600–5,800 psi |
| Max Temperature | 500°F | 575°F |
| Chemical Compatibility | High | High |
| Friction | Low | Low |
| Best For | High-pressure systems (oil & gas, hydraulics) | High-temperature, moderate-pressure applications |
Need high-performance sealing solutions for extreme conditions?
At KINTEK, we specialize in precision-engineered PEEK and PTFE components tailored for semiconductor, medical, laboratory, and industrial applications. Whether you require custom fabrication or high-volume orders, our expertise ensures reliability under the most demanding pressures and temperatures.
Contact us today to discuss your specific needs and discover how our solutions can enhance your system's efficiency and safety.