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Swagelok VCR Male Tee Unions

Swagelok VCR Male Tee Unions: Three-Way Face-Seal Solutions for UHV and Gas Systems

Swagelok VCR Male Tee Unions from TFM are precision-engineered for creating three-way connections in low-pressure gas and ultra-high vacuum (UHV) environments. Featuring male VCR face-seal ports on all three ends, these tees use metal gaskets to achieve superior sealing performance in critical gas applications—where purity, thermal endurance, and vacuum integrity are paramount.

Manufactured from 316L stainless steel, each tee union ensures a clean, particle-free seal using either stainless steel or copper gaskets, making them ideal for helium leak checks, gas cylinder setups, and scientific instrumentation.

Key Features of Swagelok VCR Male Tee Unions:

  • Three-Way Leak-Tight Face-Seal Configuration
    Connect three male VCR lines in a single fitting with precision face-seal geometry, enabling zero-dead-volume gas routing and junctions in space-limited setups.

  • High-Temperature Tolerance

    • Up to 538°C with stainless steel gaskets—ideal for vacuum bakeout procedures.

    • Up to 204°C with copper gaskets for general gas plumbing and analytical systems.

  • Ultra-High Vacuum (UHV) Compatibility
    Fully rated for vacuum environments down to 10⁻⁹ Torr, Swagelok VCR Male Tee Unions are perfect for research labs, semiconductor tools, and mass spectrometry equipment.

  • All-Metal Construction
    Fabricated from 316L stainless steel, these tee unions provide superior corrosion resistance, cleanliness, and compatibility with high-purity or reactive gases.

  • Easy Installation and Remake
    The VCR system offers consistent sealing performance with metal gaskets that are field-replaceable, minimizing downtime and simplifying maintenance.

Applications:

  • Three-way gas distribution from lecture bottle regulators

  • Branch connections in helium leak detection setups

  • UHV chamber feedthroughs or analytical gas panel junctions

  • Mid-line branching in cleanroom gas plumbing or sampling

  • Tri-directional gas control in vacuum-compatible manifolds

TFM offers a full range of Swagelok VCR-compatible components, including elbow unions, cross unions, male/female adapters, caps, and face-seal gaskets, giving you everything needed to design and maintain a world-class gas or UHV system.

Ordering Table

Reference Material Tube OD 1 Part Number
VCR Male Tee Union Stainless Steel 1/8" 2MVCR-T
VCR Male Tee Union Stainless Steel 1/4" 4MVCR-T
VCR Male Tee Union Stainless Steel 1/2" 8MVCR-T

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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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