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Feedthrough Baseplate Coupling Connectors

Feedthrough Baseplate Coupling Connectors: Reliable Vacuum-Tight Tube Interfaces for 1″ Baseplate Ports

Feedthrough Baseplate Coupling Connectors from TFM are engineered to establish secure, vacuum-tight connections between external tubing and internal vacuum chamber volumes. Designed to fit standard 1″ baseplate ports, these feedthrough couplings accommodate vacuum walls with thicknesses ranging from 1/4″ to 1-1/4″, making them highly adaptable for use in research chambers, system builds, and modular upgrades.

Each connector is precisely machined from high-quality aluminum and includes an internal o-ring seal positioned on the vacuum side of the port, ensuring reliable performance at high or ultra-high vacuum levels. Depending on system design, users can choose between compression o-ring tube connections or female NPT-threaded interfaces for plumbing flexibility.

Key Features of Feedthrough Baseplate Coupling Connectors:

  • Baseplate-Compatible Design
    Engineered to fit standard 1″ vacuum baseplate ports, allowing quick integration into existing or new vacuum systems.

  • Wall Thickness Range: 1/4″ to 1-1/4″
    Accommodates common vacuum chamber wall dimensions, supporting both compact and reinforced baseplates.

  • Material Construction
    Manufactured from aluminum for lightweight strength and vacuum compatibility. (Stainless steel available for coupling plugs only.)

  • Dual Tube Connection Methods
    Compression O-Ring Fitting: For leak-tight sealing around smooth tubing.
    Female NPT Fitting: For threaded connections with process lines or adapters.

  • Vacuum-Side O-Ring Sealing
    O-ring is seated inside the chamber for optimal pressure resistance and minimal leak paths.

  • Coupling Plug Compatibility
    Can be easily blanked off using TFM’s Feedthrough Coupling Plugs, which are supplied with matching o-rings for secure sealing when not in active use.

Applications:

  • Connecting gas lines, cooling loops, or instrumentation tubing to vacuum chambers

  • Modular chamber access in research and industrial HV systems

  • Temporary or flexible process gas injection points

  • Vacuum manifold builds requiring NPT thread or smooth tube compatibility

  • Vacuum system expansion or maintenance access

TFM also offers matching Feedthrough Coupling Plugs, replacement o-rings, and adapter fittings, allowing engineers to configure robust, adaptable vacuum plumbing with long-term reliability.


In conclusion, Feedthrough Baseplate Coupling Connectors provide a clean, leak-tight, and flexible solution for interfacing external tubes with vacuum systems. Their precision-sealed design and versatile connection options make them indispensable in research, semiconductor, and custom vacuum engineering environments.

Ordering Table

Feedthrough Baseplate Coupling Connectors

Type Drawing Nominal Tube OD VacuCADSM Part Number
Aluminum Tooltip 1/8 (please log in) FCH-012
Stainless Steel Tooltip 1/8 (please log in) FCH-012S
Aluminum Tooltip 1/4 (please log in) FCH-025
Stainless Steel Tooltip 1/4 (please log in) FCH-025S
Aluminum Tooltip 3/8 (please log in) FCH-037
Stainless Steel Tooltip 3/8 (please log in) FCH-037S
Aluminum Tooltip 1/2 (please log in) FCH-050
Stainless Steel Tooltip 1/2 (please log in) FCH-050S
Aluminum Tooltip 5/8 (please log in) FCH-062
Stainless Steel Tooltip 5/8 (please log in) FCH-062S
Aluminum Tooltip 3/4 (please log in) FCH-075
Stainless Steel Tooltip 3/4 (please log in) FCH-075S
Aluminum Tooltip 1 (please log in) FCH-100
Stainless Steel Tooltip 1 (please log in) FCH-100S

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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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