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KF (QF) to ASA Adapters—Flat & Grooved

KF (QF) to ASA Adapters—Flat & Grooved

KF (QF) to ASA Adapters—Flat & Grooved: Seamless Cross-System Flange Integration for Vacuum Systems

KF (QF) to ASA Adapters—Flat & Grooved by TFM are precision-machined components designed to interface KF (QF) flanges with ASA-style flanges, enabling smooth transitions between different vacuum standards. Constructed from high-grade 304 stainless steel, these adapters are ideal for connecting European-style quick flanges (KF) to North American ASA flange systems.

These versatile KF (QF) to ASA Adapters—Flat & Grooved are available in two sealing configurations: one end terminates with a KF (QF) flange for quick-clamp style connections, and the other with either a flat ASA flange or a grooved ASA flange, depending on your sealing preference (copper gasket or elastomer o-ring).

Key Features of KF (QF) to ASA Adapters—Flat & Grooved:

  • Cross-Standard Compatibility
    Perfect for systems requiring reliable interface between KF (QF) and ASA flange types, supporting mixed-vacuum hardware integration.

  • Flat or Grooved ASA End Options
    Choose between flat ASA flanges for standard metal-to-metal contact or grooved ASA flanges when an o-ring seal is needed for higher vacuum reliability.

  • 304 Stainless Steel Construction
    Each adapter is made from corrosion-resistant 304 stainless steel, ensuring mechanical strength and chemical stability in HV and light UHV conditions.

  • Compact and Weld-Free Installation
    These adapters eliminate the need for flange modification or welding, simplifying integration into existing setups.

  • Reliable Sealing and Performance
    When used with appropriate clamps, bolts, and gaskets, KF (QF) to ASA Adapters—Flat & Grooved ensure leak-tight operation across standard vacuum pressures.

Applications:

  • Bridging KF foreline components to ASA-flanged vacuum chambers

  • Retrofitting older ASA-based systems with modern KF (QF) valves or pumps

  • Integrating international vacuum accessories in research or industrial systems

  • Supporting hybrid infrastructure in analytical instrumentation or coating systems

  • Facilitating quick reconfiguration in test stands and modular UHV platforms

TFM offers a wide selection of vacuum adapter flanges, including ISO to ASA, KF to CF, and custom KF (QF) to ASA Adapters—Flat & Grooved, helping you achieve compatibility across global vacuum technologies.

Ordering Table

Flange Size/OD Type Drawing Nominal Tube OD Part Number
ASA 1 (4.25" OD) Flat Tooltip 3/4 QF16XASA4
ASA 1 (4.25" OD) Grooved Tooltip 3/4 QF16XASA4G
ASA 1.5 (5.00" OD) Flat Tooltip 3/4 QF16XASA5
ASA 2 (6.00" OD) Flat Tooltip 3/4 QF16XASA6
ASA 6 (11.00" OD) Flat Tooltip 1 QF25XASA11
ASA 6 (11.00" OD) Grooved Tooltip 1 QF25XASA11G
ASA 2 (6.00" OD) Flat Tooltip 1 QF25XASA6
ASA 2 (6.00" OD) Grooved Tooltip 1 QF25XASA6G
ASA 3 (7.50" OD) Flat Tooltip 1 QF25XASA7
ASA 3 (7.50" OD) Grooved Tooltip 1 QF25XASA7G
ASA 4 (9.00" OD) Flat Tooltip 1 QF25XASA9
ASA 4 (9.00" OD) Grooved Tooltip 1 QF25XASA9G
ASA 6 (11.00" OD) Flat Tooltip 1-1/2 QF40XASA11
ASA 6 (11.00" OD) Grooved Tooltip 1-1/2 QF40XASA11G
ASA 1.5 (5.00" OD) Flat Tooltip 1-1/2 QF40XASA5
ASA 1.5 (5.00" OD) Grooved Tooltip 1-1/2 QF40XASA5G
ASA 2 (6.00" OD) Flat Tooltip 1-1/2 QF40XASA6
ASA 2 (6.00" OD) Grooved Tooltip 1-1/2 QF40XASA6G
ASA 3 (7.50" OD) Flat Tooltip 1-1/2 QF40XASA7
ASA 3 (7.50" OD) Grooved Tooltip 1-1/2 QF40XASA7G
ASA 4 (9.00" OD) Flat Tooltip 1-1/2 QF40XASA9
ASA 4 (9.00" OD) Grooved Tooltip 1-1/2 QF40XASA9G
ASA 6 (11.00" OD) Grooved Tooltip 2 QF50XASA11G
ASA 1.5 (5.00" OD) Flat Tooltip 2 QF50XASA5
ASA 1.5 (5.00" OD) Grooved Tooltip 2 QF50XASA5G
ASA 2 (6.00" OD) Flat Tooltip 2 QF50XASA6
ASA 2 (6.00" OD) Grooved Tooltip 2 QF50XASA6G
ASA 3 (7.50" OD) Flat Tooltip 2 QF50XASA7
ASA 3 (7.50" OD) Grooved Tooltip 2 QF50XASA7G
ASA 4 (9.00" OD) Flat Tooltip 2 QF50XASA9
ASA 4 (9.00" OD) Grooved Tooltip 2 QF50XASA9G

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FAQ

Tube fittings are designed for tubes (measured by outside diameter and wall thickness) used in high-pressure and instrumentation applications, whereas pipe fittings are for pipes (identified by nominal pipe size) primarily used in fluid transport.

 

Common valve types include ball valves, gate valves, check valves, butterfly valves, and globe valves. Each serves a specific function—from quick shutoff (ball/gate valves) to flow regulation (globe valves).

 

  • For tubing, measure the outside diameter; for pipes, refer to the nominal pipe size (using conversion charts if needed). Always match the valve or fitting size to your pipe’s dimensions and flow requirements.

  • Frequently used thread types include NPT (National Pipe Tapered), BSP (British Standard Pipe), and UNC, along with slip-fit options that rely on compression or fusion rather than threads.

Interchangeability depends on manufacturer specifications and certification. Always verify compatibility via manufacturer guides or certified interchangeability charts.

 

  • A coupling is a short, straight fitting used to join two pipes or tubes. It provides a secure, leak-tight connection and can sometimes serve to extend or repair piping runs.

Consider valve type, pressure and temperature ratings, material compatibility with your fluid, actuation method (manual or automatic), and maintenance requirements.

 

  • Valves regulate flow by opening, closing, or partially obstructing the pathway. Their mechanisms (such as the rotation of a ball or the linear movement of a gate) determine the speed and precision of flow control.

  • A flange is a flat, circular component used to connect pipes, valves, or other equipment. Bolted together with gaskets, flanges provide a secure, leak-proof joint that facilitates both assembly and maintenance.

  • Manual valves require physical operation via handles or levers, whereas actuated valves use mechanisms—pneumatic, electric, or hydraulic—to open and close automatically or remotely.

  • Issues include leaks caused by improper installation, over-tightening, degraded seals, material incompatibility, and fatigue from repeated cycling. Regular inspection and proper installation practices help mitigate these problems.

Regular maintenance involves periodic inspections, cleaning or replacing worn seals, ensuring proper torque during installation, and adhering to manufacturer guidelines and local plumbing codes to preserve system integrity.

 

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