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Swagelok VCR Male Cross Unions

Swagelok VCR Male Cross Unions: Four-Way Metal Gasket Sealing for High-Purity Gas Systems

Swagelok VCR Male Cross Unions from TFM provide precision four-way connections for low-pressure gas systems and ultra-high vacuum (UHV) environments. Featuring male VCR face-seal ports on all four ends, these cross unions are ideal for integrating multiple gas lines or test pathways into compact, leak-tight configurations.

Constructed from 316L stainless steel, each VCR Male Cross Union ensures metal-to-metal sealing using either stainless steel or copper gaskets, providing unmatched reliability in high-temperature, high-purity, and cleanroom applications.

Key Features of Swagelok VCR Male Cross Unions:

  • Leak-Tight Face-Seal Connections
    The metal gasket design provides a clean, repeatable seal without elastomers—ideal for corrosive, high-purity, and oxygen-sensitive gas lines.

  • High-Temperature Endurance

    • Operates up to 538°C with stainless steel gaskets, enabling use in vacuum chamber bakeout procedures.

    • Maintains performance up to 204°C with copper gaskets, suitable for standard gas handling systems.

  • UHV Compatibility
    Built for pressures down to 10⁻⁹ Torr, these fittings support helium leak detection, mass spectrometry, and other ultra-clean gas delivery applications.

  • Four-Way Flow Configuration
    The cross union design allows simultaneous connection of four gas lines—ideal for splitting, merging, sampling, or diagnostic access points within your gas distribution architecture.

  • All-Metal Construction
    Made from 316L stainless steel with precision-machined sealing faces to ensure purity, corrosion resistance, and long service life.

Applications:

  • Gas routing in lecture bottle systems or gas cabinets

  • Distribution hubs in helium leak check setups

  • Process gas manifolds in semiconductor tools

  • Cross-point access in analytical instrumentation

  • UHV-compatible interfaces in cleanroom environments

TFM also offers a full range of Swagelok VCR fittings, including female crosses, male/female adapters, face-seal nuts, and replacement gaskets to support every configuration required in high-performance gas and vacuum systems.

Ordering Table

Reference Material Tube OD 1 Part Number
VCR Male Cross Union Stainless Steel 1/8" 2MVCR-CS
VCR Male Cross Union Stainless Steel 1/4" 4MVCR-CS
Crosses Stainless Steel 1/4" 4MVCR-CS
VCR Male Cross Union Stainless Steel 1/2" 8MVCR-CS

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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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