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Swagelok to Female NPT Adapters

Swagelok to Female NPT Adapters

Swagelok to Female NPT Adapters: Reliable Tube-to-Thread Connections for Gas and Fluid Systems

Swagelok to Female NPT Adapters by TFM offer a secure, leak-resistant solution for connecting Swagelok compression fittings to female NPT (National Pipe Thread) ports in gas or liquid handling systems. Designed to ensure torque-free, leak-proof seals, these adapters are essential components in high-performance instrumentation, vacuum, and fluid process setups.

Each adapter combines Swagelok’s proven dual-ferrule compression design with precision-machined NPT threading, creating a durable and easy-to-install connection point between tubing and threaded hardware.

Key Features of Swagelok to Female NPT Adapters:

  • Leak-Proof, Torque-Free Sealing
    The Swagelok compression end creates a secure seal without overtightening, ensuring long-term system reliability while protecting tube integrity.

  • Elimination of Hazardous and Costly Leaks
    Engineered for high-pressure or sensitive systems, these adapters prevent gas or liquid leaks in critical instrumentation, reducing safety risks and operational costs.

  • Versatile Material Selection

    • Stainless Steel: Preferred for gas systems, including UHV applications, vacuum lines, chemical dosing, and laboratory process systems.

    • Brass: Ideal for water systems or low-pressure setups, offering corrosion resistance and economic value.

  • Industry-Standard Compatibility
    The female NPT thread side is machined to ANSI/ASME specifications for tapered thread sealing, while the Swagelok end fits standard fractional or metric tubing sizes.

  • Compact, Straight Adapter Design
    The simple, in-line configuration is ideal for use in confined panels, valve assemblies, and integrated skids.

Applications:

  • Connecting tubing to female-threaded regulators, valves, or chambers

  • Adapting gas distribution panels, analytical instrumentation, or filtration systems

  • Integrating water supply lines in cooling circuits or environmental chambers

  • Supporting hydraulic, pneumatic, and process control assemblies

  • Retrofitting equipment with mixed flange and thread interface standards

TFM also supplies a complete range of Swagelok-compatible fittings, including male NPT adapters, elbows, bulkhead unions, and custom transitions—ensuring you have the components you need for a fully integrated and reliable tubing system.

Ordering Table

Swagelok to Female NPT Adapters

Reference Material Tube OD 1 Pipe Size Part Number
Swagelok to Female NPT Adapter Stainless Steel 1/8" 1/8" SS-200-7-2
Swagelok to Female NPT Adapter Stainless Steel 1/8" 1/4" SS-200-7-4
Swagelok to Female NPT Adapter Stainless Steel 1/4" 1/8" SS-400-7-2
Swagelok to Female NPT Adapter Stainless Steel 1/4" 1/4" SS-400-7-4
Swagelok to Female NPT Adapter Stainless Steel 3/8" 1/8" SS-600-7-2
Swagelok to Female NPT Adapter Stainless Steel 3/8" 1/4" SS-600-7-4
Swagelok to Female NPT Adapter Brass 1/4" 1/8" B-400-7-2
Swagelok to Female NPT Adapter Brass 1/4" 1/4" B-400-7-4
Swagelok to Female NPT Adapter Brass 3/8" 1/8" B-600-7-2
Swagelok to Female NPT Adapter Brass 3/8" 1/4" B-600-7-4

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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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