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Flow control solutions

KOENIG RESTRICTOR® and KOENIG CHECK VALVE® are designed for reliable performance and simple installation in your application. Easy integration in numerous diverse applications such as automotive powertrains, commercial vehicles, construction equipment, medical equipment, agricultural equipment, and various fluid power and hydraulic systems.

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Thanks to the wide and comprehensive range, there are many ways to use them for a wide variety of applications.

We are happy to support you in the search and selection of the best product to solve your challenges.

Take advantage of our many years of experience and find out how our solutions can create real added value for your company. We offer:

  • C-parts optimization - reduction of the variety of parts
  • Development partnership
  • Automation and process monitoring
  • Complete systems - everything from a single source

We advise you quickly, free of charge and competently.

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SFL Beratung


KOENIG Check Valve


The KOENIG CHECK VALVE® ® is simple to install and a reliable solution to control flow directions in fluid systems.


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RE series


The expansion restrictors work according to the pressure-spreading principle. The restrictors are available in both metric and inch dimensions and throttle the flow. The expansion restrictors are used in a variety of different applications.


  • Sleeve: 303/304 stainless steel
  • Pin: 17-4PH stainless steel

> Flyer solutions for flow control


RT series


The threaded Restrictors are conveniently available in various sizes. Restrictors are currently used in numerous diverse applications such as mobile fluid power, automotive, medical, agriculture, construction, marine and aerospace. 

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Do you already know our sealing technology products?

The KOENIG-EXPANDER® is the world's No. 1 in sealing technology for the fast and reliable closing of bores.



  • Process reliability during the setting process
  • Set-up time savings
  • Expander types in different materials
  • Available for a wide variety of applications