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Weldable Tube 6-Way Crosses

Weldable Tube 6-Way Crosses for UHV and Semiconductor Applications

TFM’s Weldable Tube 6-Way Crosses are purpose-built components engineered for the most demanding ultra-high vacuum (UHV) environments and semiconductor processing infrastructure. Crafted from 304 series stainless steel using advanced fabrication methods, these six-way fittings offer unparalleled cleanliness, precision, and adaptability for high-performance vacuum systems.

Each 6-way cross is fabricated using the pulled-port technique, ensuring full-penetration butt welds for enhanced mechanical integrity and leak-tight performance. Designed specifically to meet UHV standards, these crosses deliver vacuum capability down to ≥ 1×10⁻¹³ Torr, ideal for critical applications in semiconductor subfabs, pump exhaust lines, and foreline vacuum plumbing.

The defining feature of the Weldable Tube 6-Way Cross is its multi-axis symmetry, offering six tube connections in perpendicular orientations. This makes it a superior choice for vacuum network hubs or distribution nodes where multiple gas or vacuum lines must converge with minimal contamination risk.

With a temperature tolerance ranging from –200°C to +450°C, these crosses are suitable for both cryogenic and high-temperature operations. Their crevice-free weld geometry ensures that no particle traps or contamination pockets exist, which is essential for high-purity process environments.

Key Features of Weldable Tube 6-Way Crosses:

  • Material: 304 Stainless Steel, ideal for semiconductor-grade UHV systems.

  • Six-Way Configuration: Offers connection points on all three Cartesian axes, enabling efficient system layouts.

  • Cleanroom-Ready: Cleaned and prepared for use in ultra-high vacuum environments exceeding 1×10⁻¹³ Torr.

  • Fabrication: Constructed via pulled-port method with full-penetration butt welds to eliminate internal crevices.

  • Temperature Range: Capable of withstanding thermal conditions between –200°C to +450°C.

  • Custom Configurations: TFM offers tailored tube diameters, wall thicknesses, and flanged variants upon request to meet your exact design requirements.

Applications Include:

  • Semiconductor foreline and exhaust systems

  • Gas distribution manifolds in vacuum deposition tools

  • Research-grade UHV chamber interfaces

  • Cryogenic and high-temperature vacuum processing lines

  • Critical vacuum junction hubs for multi-directional flow

Whether you’re constructing a new semiconductor-grade vacuum manifold or upgrading existing UHV tooling, TFM’s Weldable Tube 6-Way Crosses provide the strength, cleanliness, and reliability your system demands.

For engineering drawings, dimensions, or custom fabrication inquiries, please contact TFM’s support team for expert assistance.

Ordering Table

Drawing WallThickness DimA TubeOD Part Number
Tooltip 0.04 1 0.75 G-11W-075
Tooltip 0.07 1.88 1 G-11W-100
Tooltip 0.12 9.5 10 G-11W-1000
Tooltip 0.07 2.25 1.5 G-11W-150
Tooltip 0.07 3 2 G-11W-200
Tooltip 0.07 3 2.5 G-11W-250
Tooltip 0.07 3.75 2.5 G-11W-250V
Tooltip 0.07 3.25 3 G-11W-300
Tooltip 0.08 3.88 4 G-11W-400
Tooltip 0.08 4.87 4 G-11W-400V
Tooltip 0.08 4.25 5 G-11W-500
Tooltip 0.08 5 6 G-11W-600
Tooltip 0.08 6.06 6 G-11W-600V
Tooltip 0.12 7 8 G-11W-800

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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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