Ring and seals

Secure your assemblies

Tension rings to ensure firm seating of your rubber and metal assemblies

RPK Group manufactures retaining rings (including snap rings and circlips) and spring components for sealing applications. Retaining rings hold components axially in a housing or on a shaft; spring seal elements maintain consistent radial force for reliable sealing. We produce both in stainless steel and special alloys under IATF 16949 with 100% control.

Tension rings or flat rings for ball joints are coiled in double layers from spring high-quality materials with a low-burr cut. Our engineers have developed special cut and shank geometry to avoid any damage in the final assembly. 

Contact us now
Ring and seals

Advantages and benefits of rings and seals

  • Round and flat wire rings, tension rings, circlips, and retaining rings for varied seating needs
  • Damage-free assembly: low-burr cut and shank geometry protect mating parts during fitting
  • Secure radial force: consistent seating and sealing for rubber and metal assemblies

Measures

  • Wire diameter: 0.20-6 mm (0.008-0.2 in)
  • Other dimensions as required

Materials

The choice of the right material, surface treatment and coating are critical for the final quality and safety of the product. From stainless steels to the most specific materials bought in from the best suppliers. 

  • Carbon steel
  • Stainless steel
  • Inconel  
  • Elgiloy 
  • Hastelloy 
  • Chrome silicon
  • Other materials according to your special requirements

Industries / Applications

Go to Automotive
Go to Medical
Go to Electric
Go to Industrial
Go to E-Mobility
Go to Power tools
Go to Consumer goods
Go to Other industries
Go to Bike and eBike

Frequently Asked Questions

What types of rings and seals does RPK Group manufacture?

RPK Group manufactures precision metal rings, retaining rings, and spring-energized seal elements. Metal seal rings are used in high-pressure fluid systems, gas turbines, and aerospace applications where elastomeric seals fail due to temperature or chemical incompatibility.

What is a spring-energized seal?

A spring-energized seal consists of a polymer jacket (typically PTFE or UHMWPE) with a metal spring inside, often a canted coil spring or a coiled flat strip. The spring continuously loads the polymer lips against the sealing surface, compensating for wear, thermal expansion, and creep in the jacket material. This design maintains sealing performance throughout the assembly's service life.

Where are spring-energized seals used?

Spring-energized seals are standard in aerospace flight control actuators, oil & gas wellhead equipment, cryogenic valves, pharmaceutical process equipment, and semiconductor manufacturing tools. They are used wherever conventional O-rings fail due to temperature extremes, aggressive chemicals, or rapid pressure cycling.

What materials are used for metal seal rings?

Metal seal rings are manufactured from stainless steel, Inconel, Hastelloy, and other corrosion-resistant alloys, depending on the service temperature, pressure, and chemical environment. Plating with silver or gold improves surface conformability and sealing.

Can you manufacture metal seals for oil & gas downhole applications?

Yes. Downhole seals must withstand extreme pressure (up to 1,000+ bar), high temperatures (above 175°C), and corrosive hydrogen sulfide (H2S) environments. RPK Group manufactures metal seal rings and spring-energized seals in NACE-compliant materials for downhole, wellhead, and subsea sealing applications.

Get the most out of our expertise

Our engineers work alongside our customers to find the best solution for them, applying scientific methods and knowledge accumulated over almost 50 years. 

Related news

Do you need help for your next project?

Contact our engineering and sales teams. We will help you find the best solution for your applications.

+34 945 25 77 00

Contact us