Leader in
Sealing & Flow Control

Engineered Sealing Solutions

KOENIG EXPANDER® plugs seal drilled holes with best-in-class reliability.

  • Push-type up to 450 bar (6500 psi)
  • Pull-type up to 500 bar (7200 psi)
  • Sizes 3-22mm (0.093-0.875")
  • No sealant needed
  • Even stress on bore walls
  • No installation contamination or debris
> Learn about metal-to-metal sealing

Precision Flow Control

KOENIG RESTRICTORS® provide precise flow control in fluid systems.

  • Pressures up to 200 bar (3000 psi)
  • Sizes 4-10mm (0.093-0.875")
  • Expander and threaded styles

Precision KOENIG CHECK VALVE® parts:

  • Forward and reverse-flow
  • Pressures up to 280 bar (4352 psi)
> Learn about flow control solutions

Find Your Part

Use our Product Selector to quickly identify the best expander plug and flow restrictor component based on key specifications.

Global Leadership in Sealing & Flow Control

The original inventor of the one-piece sealing solution, SFC KOENIG has led the industry in quality, reliability and performance since 1927.

Featured Applications

Wherever safe, secure sealing and flow control is needed, SFC KOENIG is there.

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