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China CF Knife-edge Flange Gas Sealed Connectors - High-Integrity Vacuum Solutions from Reliable Suppliers & Factory
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China CF Knife-edge Flange Gas Sealed Connectors - High-Integrity Vacuum Solutions from Reliable Suppliers & Factory

The Knife-Edge Flange (CF) Receptacle is a precision-engineered component that provides high-integrity, demountable seals, crucial for high-vacuum (HV) and ultra-high-vacuum (UHV) systems. Manufactured in strict compliance with the international standard ISO 3669**, this product line guarantees global compatibility and interchangeability, making it ideal for scientific and industrial vacuum infrastructure. Available from China, our factory offers a comprehensive range of nominal diameters from 10mm to 50mm. These flanges serve as a scalable sealing solution for constructing and interfacing vacuum chambers, pipelines, and equipment, suitable for small research instruments as well as extensive industrial systems. As one of the leading suppliers in the market, we ensure that our Knife-Edge Flanges meet the highest quality standards for your vacuum applications
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    Product Details

    Features and Advantages

    • 1

      The defining feature is the knife-edge sealing mechanism, where a sharp, precision-machined edge on the flange bites into a soft, ductile metal gasket (typically copper or aluminum) to form an extremely reliable, helium-leak-tight metal seal.

    • 2

      This design offers the critical advantages of superior sealing performance, the ability to withstand bake-out temperatures exceeding 150°C for UHV applications, and excellent reusability over many cycles.

    • 3

      The receptacle housing is crafted from high-grade stainless steel, typically 304 or 316L, providing excellent corrosion resistance, mechanical strength, and compatibility with the shell sealing requirements of connected components.

    • 4

      The system's versatility is enhanced by support for various plug configurations, including single-ended plugs, double-ended plugs, and double-ended wiring forms, allowing for flexible system design. A significant additional advantage is the capacity for customization of both standard and non-standard vacuum flange structures and dimensions to meet unique application requirements.

    Application

    These CF flanges are fundamental components in any application requiring reliable high or ultra-high vacuum. Key sectors include:

    Scientific Research

    Particle accelerators, synchrotrons, surface science analysis chambers (e.g., XPS, AES), and fusion research devices.

    Semiconductor Manufacturing

    Critical for plasma etching, chemical vapor deposition (CVD), and molecular beam epitaxy (MBE) systems.

    Space Simulation

    Used to construct thermal vacuum chambers for testing satellites and spacecraft components.

    Advanced Analytical Instrumentation

    Mass spectrometers, electron microscopes, and other high-vacuum analytical tools.

    Frequently Asked Questions

    Q What is a knife-edge sealing mechanism and why is it important for CF flanges?
    The knife-edge sealing mechanism features a sharp, precision-machined edge on the flange that bites into a soft metal gasket — typically copper or aluminum — when bolted together. This creates a helium-leak-tight metal seal that is critical for maintaining ultra-high vacuum (UHV) integrity, making it far superior to elastomer-based seals in demanding environments.
    Q What gasket materials are compatible with CF flanges?
    CF flanges are most commonly used with soft, ductile metal gaskets made from copper or aluminum. These materials deform under compression to conform to the knife-edge, forming a robust and leak-tight seal suitable for both high vacuum (HV) and ultra-high vacuum (UHV) applications.
    Q Can CF flanges withstand high bake-out temperatures?
    Yes. One of the key advantages of CF flanges with metal gaskets is their ability to withstand bake-out temperatures exceeding 150°C. This is essential for UHV systems, where baking the chamber is a standard procedure to outgas internal surfaces and achieve the lowest possible base pressures.
    Q What stainless steel grades are used in the receptacle housing, and why?
    The receptacle housing is typically manufactured from 304 or 316L stainless steel. These grades are chosen for their excellent corrosion resistance, strong mechanical properties, and low outgassing rates — all of which are essential for maintaining vacuum integrity and ensuring long-term reliability in demanding environments.
    Q What plug configurations are available for these CF flange connectors?
    These CF flange connectors support multiple plug configurations to suit various system designs, including single-ended plugs, double-ended plugs, and double-ended wiring forms. This flexibility allows engineers to select the most appropriate configuration for their specific vacuum system layout and electrical feedthrough requirements.
    Q Are custom flange structures and dimensions available for non-standard applications?
    Yes. A significant advantage of these CF flange systems is the availability of customization for both standard and non-standard vacuum flange structures and dimensions. This makes them suitable for unique or highly specialized application requirements across industries such as semiconductor manufacturing, scientific research, and space simulation.

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