A vacuum seal is a critical component that maintains airtight integrity in viewport assemblies by preventing gas or fluid leakage under vacuum conditions.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Leak Rate | <1×10^-9 mbar·L/s (helium leak tested) | |
| Vacuum Range | 10^-3 to 10^-9 mbar | |
| Surface Finish | Ra < 0.8 μm on sealing surfaces | |
| Compression Set | <20% after 24h at 150°C | |
| Compression Force | 15-30 N/mm | |
| Temperature Range | -60°C to +300°C (material dependent) |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is used in the following industrial products
A sealed optical window assembly for visual inspection of coating processes inside a vacuum chamber while maintaining vacuum integrity.
A transparent interface on a calibration chamber that allows optical instruments to measure or monitor internal conditions without physical intrusion.
A practical evidence checklist for RFQ preparation and supplier evaluation.
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Service life varies by material and operating conditions: FKM seals typically last 3-5 years in continuous operation, while FFKM can exceed 7 years. Factors affecting lifespan include temperature cycles, chemical exposure, compression set, and maintenance practices.
Material selection depends on: 1) Operating temperature range, 2) Chemical compatibility with process media, 3) Required vacuum level, 4) Compression set requirements, 5) Regulatory compliance needs. FKM is standard for most applications, FFKM for aggressive chemicals, and metal seals for ultra-high vacuum.
Regular inspection every 6-12 months for compression set, surface degradation, or leakage. Replacement is recommended when leak rates exceed specifications or visible damage occurs. Proper installation torque and surface preparation are critical for optimal performance.
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