PTFE piston rings are designed to operate within specific limits to ensure optimal performance and longevity. These limits include median piston speeds up to 5.2 m/s, a temperature range from –60 °C to +200 °C, and the ability to seal maximum pressure differences up to 100 bar. Proper installation is also crucial, with minimal elongation and specific surface roughness requirements for the groove base and flank. These operational parameters ensure the rings function effectively in various industrial applications.
Key Points Explained:
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Median Piston Speed
- PTFE piston rings can operate at speeds up to 5.2 m/s.
- This speed is critical for applications involving reciprocating motion, ensuring minimal wear and efficient sealing.
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Temperature Range
- The operational temperature range for PTFE piston rings is –60 °C to +200 °C.
- Some references indicate PTFE spacer rings can withstand even broader ranges (-200°C to 260°C), but for piston rings, the standard range ensures material integrity and performance.
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Pressure Sealing Capacity
- These rings can seal maximum pressure differences up to 100 bar.
- This makes them suitable for high-pressure environments, such as hydraulic systems or compressors.
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Installation Requirements
- Minimal elongation during installation is necessary to prevent deformation.
- Surface roughness specifications:
- Groove base: Rz 10 µm and Ra 1.6 µm.
- Groove flank: Rz 4 µm and Ra 0.8 µm.
- Proper installation ensures optimal contact and reduces wear over time.
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Material Suitability
- PTFE’s low friction and chemical resistance make it ideal for piston rings in demanding environments.
- The operational limits align with PTFE’s material properties, ensuring durability and reliability.
Understanding these limits helps purchasers select the right piston rings for their specific applications, balancing performance with longevity. Have you considered how these parameters might vary in extreme operating conditions?
Summary Table:
| Parameter | Operational Limit |
|---|---|
| Median Piston Speed | Up to 5.2 m/s |
| Temperature Range | –60 °C to +200 °C |
| Max Pressure Difference | 100 bar |
| Groove Base Roughness | Rz 10 µm, Ra 1.6 µm |
| Groove Flank Roughness | Rz 4 µm, Ra 0.8 µm |
Ensure your equipment operates at peak efficiency with precision-engineered PTFE piston rings from KINTEK. Our components are designed for durability in semiconductor, medical, and industrial applications. Contact us today to discuss custom solutions tailored to your needs—from prototypes to high-volume orders.