How to choose between KF, CF, and ISO standard interfaces?
When choosing between KF, CF, and ISO standard interfaces, the decision primarily depends on the required vacuum level, temperature range, and application environment.
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KF (Klein Flange) standards are typically used for rough to high vacuum applications (down to 10⁻⁸ mbar) and are characterized by their quick assembly and disassembly using a clamp and centering ring. They are generally suitable for temperatures up to 200°C with appropriate O-rings.
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CF (Conflat Flange) standards are designed for ultra-high vacuum (UHV) and extreme high vacuum (XHV) applications (down to 10⁻¹² mbar and lower). They use a knife-edge seal against a soft metal (usually copper) gasket, which can withstand baking temperatures up to 450°C. This makes them ideal for applications requiring rigorous cleanliness and high-temperature processing.
OFSCN offers OFSCN® Fiber Optic Vacuum Sealed Flanges in both CF and KF series, supporting both male and female configurations, and single or multi-channel options. These flanges are suitable for vacuum levels better than 1x10⁻⁵ Pa and 1x10⁻⁷ Pa, with custom high-temperature products available up to 250℃.
Here are some product images for the OFSCN® Fiber Optic Vacuum Sealed Flange:
You can find more detailed parameters on our website: OFSCN® Fiber Optic Vacuum Sealed Flange.