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4-Way ISO-K HV Crosses

4-Way ISO-K HV Crosses: Core Connectivity for High-Vacuum Infrastructure

4-Way ISO-K HV Crosses manufactured by TFM are essential structural components designed to interconnect multiple branches of a high-vacuum (HV) system. Each cross features four ISO-K flanged ports, arranged orthogonally, making it ideal for constructing modular vacuum assemblies, distributing pumping lines, or integrating multiple diagnostic or process devices.

Fabricated from 304L stainless steel tubing, these crosses combine strength, corrosion resistance, and vacuum integrity. The ISO-K flanges enable fast, tool-friendly installation using standard clamp-style fasteners, centering rings, and elastomeric o-rings. This allows for secure, leak-tight connections while supporting pressures as low as 10⁻⁸ Torr.

Key Features of 4-Way ISO-K HV Crosses:

  • Precision 304L Stainless Steel Construction
    Engineered for strength and chemical compatibility, the stainless steel body performs reliably in corrosive, thermally variable, and clean vacuum environments.

  • ISO-K Flange Standardization
    All four ports are equipped with ISO-K flanges, facilitating modular connectivity using clamps rather than nuts and bolts—ideal for systems that require frequent reconfiguration or easy maintenance.

  • Orthogonal 4-Port Design
    Offers a symmetrical junction for pumps, gauges, viewports, or valves—enhancing layout efficiency and enabling flexible vacuum routing.

  • High Vacuum Readiness
    Components are helium leak tested and internally cleaned to minimize outgassing and contamination, supporting HV operations down to 10⁻⁸ Torr.

  • Standard and Custom Sizes Available
    Available in ISO63, ISO100, ISO160, and ISO200 sizes, with customizable tube lengths or flange orientations available upon request to suit system-specific requirements.

Application Scenarios:

  • Pumping station manifolds

  • Foreline distribution nodes

  • Sensor and gauge integration in vacuum chambers

  • Multi-instrument access points in analytical or thin-film systems

  • Modular assembly bases for research and development platforms

TFM also offers a full range of ISO-K accessories, including quick clamps, center rings with FKM or Buna-N o-rings, blank flanges, and transition adapters, allowing for seamless integration of the 4-way cross into your vacuum system.


In summary, 4-Way ISO-K HV Crosses are an indispensable solution for vacuum professionals who require durable, flexible, and easy-to-configure connection hubs. Whether used in semiconductor tooling, vacuum metallurgy, or advanced R&D environments, these crosses provide the structural foundation for high-performance vacuum networks.

Ordering Table

Flange Size/OD Type Flange Material Drawing Nominal Tube OD Dim A Part Number
ISO63-K (3.74" OD) Cross, 4-Way 304L SS Tooltip 2-1/2 3.25 QF63-XK
ISO80-K (4.33" OD) Cross, 4-Way 304L SS Tooltip 3 3.50 QF80-XK
ISO100-K (5.12" OD) Cross, 4-Way 304L SS Tooltip 4 4.13 QF100-XK
ISO160-K (7.09" OD) Cross, 4-Way 304L SS Tooltip 6 5.25 QF160-XK
ISO200-K (9.45" OD) Cross, 4-Way 304L SS Tooltip 8 7.38 QF200-XK
ISO250-K (11.42" OD) Cross, 4-Way 304L SS Tooltip 10 9.88 QF250-XK

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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