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Swagelok VCR Copper (Cu) Gaskets

Swagelok VCR Caps, Plugs, & Nuts

Swagelok VCR Caps: High-Purity Port Protection for UHV and Low-Pressure Gas Systems

Swagelok VCR Caps from TFM provide secure, leak-tight termination for unused VCR male or female connections in high-purity and ultra-high vacuum (UHV) gas systems. These metal-sealing caps are essential for protecting system integrity during maintenance, isolation, or reconfiguration, preventing contamination and preserving vacuum quality.

Constructed from 316L stainless steel, each cap forms a metal-to-metal seal using standard Swagelok VCR gaskets (stainless steel or copper), making them ideal for lecture bottle setups, helium leak test ports, and vacuum chamber access points.

Key Features of Swagelok VCR Caps:

  • Leak-Tight Face-Seal Closure
    Designed to cap open VCR ports using a metal gasket and nut assembly, ensuring secure, elastomer-free sealing for sensitive gas environments.

  • UHV Pressure Compatibility
    Fully suitable for pressures down to 10⁻⁹ Torr, making these caps indispensable in UHV chambers, R&D systems, and leak-check stations.

  • High-Temperature Resistance

    • With stainless steel gaskets, Swagelok VCR caps can handle bakeouts up to 538°C, supporting system sterilization or outgassing.

    • With copper gaskets, they perform reliably up to 204°C, ideal for typical gas plumbing conditions.

  • Versatile Use
    Available for both male and female VCR connections, these caps are used to blank off ports on regulators, manifolds, panels, or unused valves without disrupting overall system vacuum integrity.

  • Durable All-Metal Construction
    Made from 316L stainless steel for long-term corrosion resistance and compatibility with high-purity and reactive gases.

Applications:

  • Sealing unused ports on lecture bottle regulators

  • Temporarily isolating lines in helium leak-check systems

  • Protecting open VCR terminations in analytical gas manifolds

  • Capping diagnostic or sample lines in UHV research chambers

  • Preserving cleanliness during system maintenance or upgrades

TFM also supplies all required Swagelok VCR nuts, copper and stainless gaskets, and plugs, ensuring your system is sealed and protected under even the most demanding process conditions.

Ordering Table

Reference Material Tube OD 1 Part Number
VCR Female Nut Stainless Steel 1/8" 2FVCR-N
VCR Female Nut Stainless Steel 1/4" 4FVCR-N
VCR Female Nut Stainless Steel 1/2" 8FVCR-N
VCR Male Nut Stainless Steel 1/8" 2MVCR-N
VCR Male Nut Stainless Steel 1/4" 4MVCR-N
VCR Male Nut Stainless Steel 1/2" 8MVCR-N
VCR Plug Stainless Steel 1/8" 2MVCR-P
VCR Plug Stainless Steel 1/4" 4MVCR-P
VCR Plug Stainless Steel 1/2" 8MVCR-P
VCR Cap Stainless Steel 1/4" 4FVCR-CP
VCR Cap Stainless Steel 1/2" 8FVCR-CP

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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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