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Differences Among Three Common Types of Vacuum Flanges (CF, KF, ISO)
Understanding the Structural and Functional Distinctions of CF, KF, and ISO Vacuum FlangesSection One: Conflat (CF) Flanges• Definition and Application of CF Flanges: Metal-sealed flanges used in ultra-high vacuum applications, capable of withstanding high-temperature baking.• Key Specifications: Nominal diameters include DN16, 40, 63, 100, 160, 200, 250; vacuum capability up to 10⁻¹² mbar.• Materials and Standards: Sealing materials such as Viton, PTFE, oxygen-free copper; typically made of 304 or 316 stainless steel; compliant with GB/T 6070-2007 and GB/T 6071-2003 standards.Section Two: ISO-KF Flanges• Structure and Functionality of ISO-KF: Quick-release flanges composed of KF flanges, O-rings, centering sleeves, and clamps, allowing tool-free assembly and disassembly.• Size Range and Performance: Available in nominal diameters DN 10, 16, 25, 40, 50; vacuum capability up to 10⁻⁸ mbar.• Materials and Compliance: Sealing materials include Viton, Buna, Silicone, EPDM, aluminum; typical
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Three way pipe ISO flange interface
ISO Tees
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ISO
