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.
FK and IPT Series Products Cone and thread or medium-pressure tube fitting connections Excellent corrosion resistance in chloride-containing environmentsManufactured to meet NORSOK and NACE® MR0175/ISO15156
Features: 316 stainless steel construction; Temperatures up 1000°F (537°C); Medium-pressure (MP) fittings, Size range—1/4 to to 1 in., Pressure rating—up to 20 000 psig (1378 bar); High-pressure (HP) fittings, Size range—1/4 to 9/16 in., Pressure rating—up to 60 000 psig (4134 bar); NACE® MR0175/ISO15156 compliance available
Tube Fittings Comparison (FK Series)
Watch and compare installation of FK series and cone and thread fittings.
Compare the FittingsSwagelok Resources Curated for You
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.
White Paper: Building More Productive Upstream Fluid Systems
Learn how to achieve high fluid system reliability, reduce maintenance costs, and mitigate environmental impact by integrating Swagelok® FK series fittings into upstream oil and gas applications.
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’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 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).