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KF (QF) to 1″ Baseplate Port

KF (QF) to 1x Baseplate Port: Direct KF Flange Integration for Vacuum Chamber Penetrations

The KF (QF) to 1″ Baseplate Port Adapter from TFM is a precision-engineered component that enables a standard KF flange to pass through and seal within a 1-inch diameter baseplate port or chamber wall. Designed for high-vacuum (HV) plumbing, this adapter allows users to establish reliable foreline, roughing pump, or vent line connections directly through a chamber surface without requiring custom welding or bulkhead fittings.

Fabricated from 304 stainless steel, this adapter ensures robust vacuum compatibility, chemical resistance, and long-term performance, even in demanding operational environments.

Key Features of KF (QF) to 1 Baseplate Port Adapter:

  • Baseplate Port Compatibility
    Designed to fit tightly into a 1.00″ diameter hole, commonly found in chamber baseplates or panel openings. Ideal for vacuum system retrofits or modular designs.

  • KF Flange Interface
    Available in KF16, KF25, KF40, and other common sizes, supporting direct clamping with centering rings and KF wing-nut clamps.

  • 304 Stainless Steel Construction
    Provides excellent structural integrity, corrosion resistance, and suitability for bakeable vacuum systems.

  • Simple Installation
    The flange is inserted through the hole with the sealing o-ring mounted on the chamber side, providing a reliable vacuum seal without requiring welding or threaded bulkhead fittings.

  • Compact & Versatile
    Space-efficient and reusable—perfect for labs or research setups requiring quick access or periodic disassembly.

Applications:

  • Connecting roughing pumps to vacuum chambers through baseplates

  • Routing gas inlets, purge lines, or vent valves through standard-sized ports

  • Simplified HV manifold integration in modular or mobile vacuum systems

  • Ideal for R&D environments, thin-film systems, and load-lock assemblies

  • Vacuum chamber ports on analytical equipment such as mass spectrometers or surface science tools

TFM also supplies a full range of KF to hose adapters, test port adapters, and KF to Welch pump connectors, enabling complete and adaptable system builds from chamber to pump.

In summary, the KF (QF) to 1 Baseplate Port Adapter offers a fast, clean, and leak-tight solution for integrating KF flanges into standard baseplate openings. With high-quality stainless steel construction and precision dimensions, it delivers the reliability and modularity demanded in today’s advanced vacuum systems.

Ordering Table

Flange Size/OD Drawing Dim A Dim B Dim C Part Number
KF25 (1.57" OD) Tooltip 0.75 1.62 2.90 QF25-100-FT
KF40 (2.16" OD) Tooltip 0.75 1.62 2.90 QF40-150-FT

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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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