Fulton Bellows, a United Flexible company, has 100 plus years of experience manufacturing precision metal bellows and engineered bellows assembly solutions. Our design engineers are able to develop bellows solutions for the most basic applications to those that are extremely complicated and unique. We are able to provide you these solutions supported by life test data and years of excellent field performance.

View Precision Bellows Solutions

Fulton Bellows is the oldest manufacturer of seamless metal bellows. In 1902, Weston Fulton, a University of Tennessee meteorologist created a thermodynamic device he named the sylphon. The device revolutionized the industry worldwide. Today, Fulton Bellows continues the tradition of being a company that you can trust to provide the products and services you require.

Quality ISO9001:2008 Materials

Fulton Bellows, LLC uses a wide assortment of metal to produce bellows. These materials include various grades of:

  • Stainless Steel
  • Inconel
  • Monel
  • Hastelloy

  • Copper
  • Phosphorus Bronze
  • Beryllium Copper
  • Brass

Our Design Engineers will work closely with you to select the material which is most appropriate to your application and requirements. Due to our coil slitting capability and our relationships with many metal sources, we stock many of these materials in master coils enabling rapid order launching.


After inventing thin wall metal bellows, then manufacturing metal bellows and metal bellows assemblies, Fulton Bellows has a lot of flexibility in tooling options to make every effort to keep costs to a minimum. This includes tooling specifically designed and machined for hydroforming and tube manufacturing. The depth of our tooling portfolio means we can reduce the time from design to prototypes to production.


Fulton Bellows is vertically integrated allowing greater flexibility in the manufacturing of bellows and bellows assemblies. From our master coils, we have the flexibility for custom seamless tube sizes. Our in house machine shop allows us to develop and maintain all of our tooling. We have various annealing and heat treating capabilities that permit us to process many different types of materials. Fulton Bellows has the capability to form bellows by hydroforming or mechanically forming depending on the application. Finally, our processes allow us to form many different end and bottom configurations. Key processes include:

  • Tube manufacturing
  • Seamless >= .0004 (0.10mm) material thickness and diameters from 0.170″ to 3.00″ (4.3 – 76.2mm)
  • Welded up to 12″ (304.8mm) in diameter
  • Annealing

  • Age Hardening
  • Hydroforming—0.250″ (6.4mm) to 4.500″ (114.3mm) in diameter
  • Mechanical roll forming

Welding / Joining / Valve Added

We have an on-staff welding engineer combined with other staff and technicians that provide years of welding experience using a wide variety of welding processes. This allows us to offer a wide range of opportunities to provide value added processing to your bellows. Processes include:

  • GTAW
  • Semi-automated GTAW
  • Resistance

  • Laser
  • Brazing and soldering
  • Induction brazing
  • Epoxy


Utilizing both in process and end of line testing, Fulton Bellows ensures that your product meets your specifications. Our testing regimen includes:

  • Inline process control using Zontec SPC software
  • Brinell Hardness Test
  • Cycle Testing
  • Pressure leak test

  • Mass Spectrometer (under vacuum 1×10-9 atm)
  • Dye Penetrant
  • Bubble jar
  • Spring rate
  • Other functional testing as required