SFC KOENIG solutions are used in several industries, wherever safe, reliable sealing and flow control is needed. KOENIG EXPANDER®, KOENIG RESTRICTOR® and KOENIG CHECK VALVE® solutions are found anywhere seals or flow control technologies are required to meet the most stringent levels of quality, safety and security. Our broad portfolio of these small but extremely resilient components, including flow control orifices, flow control check valves, and expander plugs, are used across a wide spectrum of solutions.

With over 40 years of experience, more than 5 billion pieces installed and field failure rates less than 1 PPM, SFC KOENIG® is the leader in sealing and flow control technology.

› TRANSPORTATION which represents the automotive and commercial vehicle industries
› FLUID POWER which includes the mobile and stationary hydraulic industries
› PRECISION which is made up of the medical, aviation and aerospace, offshore and maritime industries

SFC KOENIG does not just supply standard products and individual components, but also provides close and active customer support in the search for ideal solutions, particularly when specific requirements must be fulfilled. Our portfolio is complemented by a range of innovative setting tools and installation equipment and, if needed can be integrated into automated, serial production workflows.

SFC KOENIG has stood for best-in-class reliability and sustainability for over 86 years of engineering excellence.


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CAD Diagrams


  • Assembled Pick-Up Trucks Featuring SFC Transportation Seal Solutions
    A row of assembled pick-up trucks ready for delivery, featuring SFC KOENIG transportation seal solutions.
  • SFC KOENIG product provide high-speed installation in assembly lines, providing reliable automotive sealing solutions.
    SFC KOENIG products are used in automated assembly lines, and are leading OEM's choice for reliable automotive sealing solutions.

Design Support

Our expertise is at your service. Speak to our engineers for complete design-in support of our sealing and flow control solutions.

Installation Equipment

SFC KOENIG offers a complete line of installation equipment including hydropneumatic systems, handheld tools and setting components.