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KF (QF) to Hose Tubulations

KF (QF) to Hose Tubulations: Versatile Vacuum Hose Integration for KF Flange Systems

The KF (QF) to Hose Tubulations by TFM are precision-engineered adapters that enable seamless connections between KF vacuum flanges and flexible rubber or plastic vacuum hoses. Designed for use in roughing lines, foreline plumbing, or temporary setups, these adapters simplify hose-based vacuum routing in research, industrial, or laboratory environments.

Available in both 304 stainless steel and aluminum, these hose tubulation adapters feature a standard KF flange on one end and a smooth hose-compatible tube extension on the other. This makes them ideal for secure, leak-resistant connections to hoses of various inner diameters, allowing users to integrate soft tubing into otherwise rigid KF-based systems.

Key Features of KF (QF) to Hose Tubulations:

  • KF Flange Compatibility
    Designed to mate with KF16, KF25, KF40, or KF50 quick-flange vacuum components, using standard centering rings and clamps for easy, tool-free installation.

  • Smooth Tubulation End
    The opposite end is a hose-adaptable stub, perfect for inserting into flexible vacuum tubing (typically secured with hose clamps), allowing simple adaptation of vacuum sources, pumps, or exhaust lines.

  • Material Options

    • 304 Stainless Steel: Ideal for corrosive environments, high-vacuum integrity, and long service life.

    • Aluminum 6061-T6: Lightweight and cost-effective for general-purpose vacuum lines.

  • Leak-Resistant Interface
    When paired with a suitable hose and clamp, the smooth tubulation ensures an airtight fit and secure vacuum performance.

  • Compact and Reusable
    Tubulations are reusable and well-suited for systems requiring frequent reconfiguration or temporary hose-based connections.

Applications:

  • Connecting KF flanged components to flexible vacuum hoses in foreline or exhaust paths

  • Temporary or mobile vacuum rigs requiring hose integration

  • Low-to-medium vacuum system plumbing for research or test environments

  • Simplified connection of gas ballast lines or venting systems

  • Clean room setups where corrosion resistance and flexibility are essential

TFM also offers KF to hose nozzles, KF to baseplate ports, and KF adapters for Welch pump inlets, providing full coverage for your vacuum line customization needs.


In conclusion, KF (QF) to Hose Tubulations from TFM offer a reliable, adaptable, and material-flexible option for integrating hoses into KF-based vacuum systems. Whether you’re building out a complex foreline or assembling a quick-test rig, these adapters simplify hose connectivity without compromising vacuum performance.

Ordering Table

KF (QF) to Hose Tubulations

Flange Size/OD Type Drawing Dim A Dim B Dim C Part Number
KF10 (1.18" OD) Aluminum Tooltip 0.63 1.65 QF10-050-H
KF10 (1.18" OD) Stainless Steel Tooltip 0.5 1.26 0.79 QF10-050-SH
KF16 (1.18" OD) Aluminum Tooltip 0.63 1.65 QF16-050-H
KF16 (1.18" OD) Stainless Steel Tooltip 0.5 1.26 0.79 QF16-050-SH
KF16 (1.18" OD) Aluminum Tooltip 0.75 1.65 QF16-075-H
KF16 (1.18" OD) Stainless Steel Tooltip 0.75 1.26 0.79 QF16-075-SH
KF25 (1.57" OD) Aluminum Tooltip 0.88 1.73 QF25-100-H
KF25 (1.57" OD) Stainless Steel Tooltip 1 1.5 1.02 QF25-100-SH
KF40 (2.16" OD) Aluminum Tooltip 1.63 2.17 QF40-150-H
KF40 (2.16" OD) Stainless Steel Tooltip 1.5 1.97 1.5 QF40-150-SH
KF50 (2.95" OD) Aluminum Tooltip 1.63 2.17 QF50-200-H
KF50 (2.95" OD) Stainless Steel Tooltip 2 2.17 1.61 QF50-200-SH

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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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