ePTFE gaskets are highly versatile sealing solutions capable of withstanding significant pressure ranges depending on flange design, media type, and operational conditions. They typically handle pressures up to 20 MPa (~3000 psi) and exhibit excellent chemical resistance, temperature stability, and mechanical resilience. Their compressibility and rebound properties make them ideal for sealing irregular surfaces in demanding industrial applications.
Key Points Explained:
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Pressure Ratings
- ePTFE gaskets can endure pressures up to 20 MPa (~3000 psi), with specific ratings like PN16 or PN40 for standardized flange systems.
- Performance depends on:
- Flange design: Higher pressures require robust flange configurations (e.g., raised-face flanges).
- Media type: Aggressive chemicals may reduce effective pressure tolerance.
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Temperature Range
- Operational range spans -200°C to 315°C (-328°F to 600°F), though some variants are rated for -40°C to 110°C in harsh chemical environments.
- Thermal stability ensures reliability in extreme conditions, such as cryogenic storage or high-temperature pipelines.
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Chemical Resistance
- Resistant to acids, bases, solvents, and hydrocarbons (pH 0–14), making them suitable for chemical processing.
- Non-reactive properties prevent degradation, even with prolonged exposure to aggressive media.
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Mechanical Properties
- Compressibility: 55–80% compression ratio adapts to uneven surfaces.
- Rebound rate: 15–20% elasticity maintains seal integrity under vibration or thermal cycling.
- Creep resistance: Minimizes deformation under sustained load, critical for long-term sealing.
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Applications
- Ideal for oil/gas, pharmaceuticals, and water treatment due to durability and sealing efficiency.
- Used in fragile equipment (e.g., glass-lined reactors) where traditional gaskets might cause damage.
For more details on material properties, see eptfe gasket.
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Limitations
- Pressure tolerance decreases with thinner gaskets or suboptimal installation (e.g., uneven bolt loading).
- Not suitable for supercritical fluids beyond 20 MPa without reinforcement.
By balancing pressure capacity with environmental factors, ePTFE gaskets offer a reliable solution for complex sealing challenges.
Summary Table:
| Property | Specification |
|---|---|
| Pressure Rating | Up to 20 MPa (~3000 psi) |
| Temperature Range | -200°C to 315°C (-328°F to 600°F) |
| Chemical Resistance | Resistant to acids, bases, solvents, and hydrocarbons (pH 0–14) |
| Compressibility | 55–80% compression ratio |
| Rebound Rate | 15–20% elasticity |
| Applications | Oil/gas, pharmaceuticals, water treatment, fragile equipment (e.g., reactors) |
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