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KF (QF) to Hose Nozzle

KF (QF) to Hose Nozzle

KF (QF) to Hose Nozzle: Quick Flange Connection for Flexible Vacuum Hose Systems

The KF (QF) to Hose Nozzle from TFM provides a reliable solution for connecting KF vacuum flanges directly to flexible vacuum hoses, streamlining setups for roughing lines, pump connections, and temporary vacuum arrangements. These adapters are commonly used in research laboratories, semiconductor facilities, and general-purpose vacuum systems where mobility and adaptability are essential.

This nozzle-type adapter features a quick flange (QF) interface on one end—available in standard sizes like KF16, KF25, KF40, and KF50—and a barbed hose nozzle on the other, compatible with 12 mm (½ inch) inner diameter (ID) hoses. This makes it an ideal connector for soft rubber or plastic tubing used in low-to-medium vacuum applications.

Key Features of KF (QF) to Hose Nozzle Adapter:

  • Standard KF Flange Interface
    Enables secure, tool-free clamping to KF vacuum components using centering rings and clamps. Available in all major KF sizes (KF16–KF50).

  • 12 mm Hose Compatibility
    The barbed nozzle end provides a tight, leak-resistant fit for ½ inch ID vacuum hoses, supporting flexible line routing and quick disassembly.

  • Material Options
    Available in 304L stainless steel for superior corrosion resistance and vacuum integrity, or lightweight aluminum for general-use and weight-sensitive applications.

  • Compact Design
    Overall length of 40 mm (1.57 inches) ensures easy integration even in tight system layouts.

  • Vacuum Range
    Suitable for roughing to high-vacuum applications (down to ~10⁻⁵ torr), depending on the hose material and system configuration.

Applications:

  • Connecting roughing pumps to vacuum chambers using flexible tubing

  • Temporary vacuum line setups in R&D and testing environments

  • Integrating hose-based exhaust or purge lines into KF-based systems

  • Quick assembly and teardown of portable vacuum rigs

  • Educational or demonstration vacuum systems where modularity is critical

TFM also offers complementary products such as KF blank flanges, KF nipples, hose clamps, and KF to ISO or CF adapters, enabling full configuration flexibility for your vacuum line architecture.

In summary, the KF (QF) to Hose Nozzle adapter is the go-to solution for bridging rigid KF vacuum hardware with soft hose assemblies. Its robust construction, standardized dimensions, and ease of use make it an essential component for any flexible vacuum setup.

Ordering Table

Flange Size/OD Type Drawing Dim A Dim B Dim C Dim D Part Number
KF16 (1.18" OD) Aluminum Tooltip 1.57 1.18 0.28 0.47 QF16-050-AHA
KF16 (1.18" OD) Stainless Steel Tooltip 1.57 1.18 0.28 0.47 QF16-050-SHA
KF25 (1.57" OD) Aluminum Tooltip 1.57 1.57 0.28 0.47 QF25-050-AHA
KF25 (1.57" OD) Stainless Steel Tooltip 1.57 1.57 0.28 0.47 QF25-050-SHA
KF40 (2.16" OD) Aluminum Tooltip 1.57 2.17 0.28 0.47 QF40-050-AHA
KF40 (2.16" OD) Stainless Steel Tooltip 1.57 2.17 0.28 0.47 QF40-050-SHA
KF50 (2.95" OD) Aluminum Tooltip 1.57 2.95 0.28 0.47 QF50-050-AHA
KF50 (2.95" OD) Stainless Steel Tooltip 1.57 2.95 0.28 0.47 QF50-050-SHA

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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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