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FK series medium-pressure tube fitting

Swagelok® Medium-Pressure Tube Fittings (FK Series)

FK series fittings reduce installation time and lower assembly and maintenance costs, while providing a more reliable and robust connection resulting in increased uptime.

Medium-Pressure Tube Fittings Catalogs

Locate detailed product information, including materials of construction, pressure and temperature ratings, options, and accessories.

Fluid system with leak-tight Swagelok<sup>®</sup> tube fittings

Tube Fittings Comparison (FK Series)

Watch and compare installation of FK series and cone and thread fittings.

Compare the Fittings

Swagelok Resources Curated for You

agi industries
AGI Industries

Read how Swagelok helped AGI Industries achieve leak-free performance at 15 000 psi for 13 500 potential leak points with Swagelok FK series valves and fittings.

Workers on an oil rig
Optimizing Medium-Pressure Oil and Gas Applications with Compression Fittings

For medium-pressure applications in oil and gas topside assets, learn how compression fittings can offer installation speed and performance benefits over traditional cone and thread connections.

offshore oil operator working with Swagelok fk tube fittings
Case Study: Offshore Oil Operator

Read how Swagelok helped an offshore oil operator reduce installation labor time and enhance overall performance by changing existing cone and thread connections with Swagelok's FK series fittings.

empa and Swagelok collaborate on hydrogen transportation using fk tube fittings
Empa and Swagelok’s Collaborative Research Fuels Development of Hydrogen Transportation Innovations

The Swiss Federal Laboratories for Materials Science and Technology (Empa) and Swagelok are exploring the viability of hydrogen-based transportation solutions. One recent research breakthrough stemming from our collaboration incorporated Swagelok’s FK series fittings within the Empa hydrogen solution. Using FK series fittings instead of traditional Swagelok tube fittings significantly eased installation, while improving leak-tightness, reliability, and safety.

FK series medium-pressure tube fitting preassembled cartridge

FK Series Medium-Pressure Tube Fittings

From initial construction and commissioning through daily operations and maintenance, there is tremendous focus on reducing total lifecycle costs.

FK series tube fittings and adapters are easy to assemble by turns or torque, reducing installation time, maintenance costs, and downtime. The strain-hardened stainless steel bodies offer a lightweight, space-saving design while providing leak-tight performance on a variety of tubing types and materials at pressures up to 22 500 psi (1551 bar).