METAL-TO-METAL SEAL COMPARISON CHART
KOENIG EXPANDER® series plugs form a secure, leak proof, metal-to-metal seal in drilled holes and ports. They provide reliable performance and integrity to critical fluid transport and pressurized fluid systems. With more than 5 billion parts installed, and failure rates less than 1 part per million (PPM), SFC KOENIG delivers proven metal-to-metal sealing solutions.
Product Comparison Chart |
KOENIG EXPANDER SEALING PLUG | Conventional Methods | |||||||
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| Product Features | Push Style | Pull Style | Ball | Set Screw | O-Ring Plug | Welding | |||
| Use in as-drilled hole |  |
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| High pressure system (>3000 psi) | |
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| Multi point, engineered sealing solution | |
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| Metal-to-metal sealing | |
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| No contamination or debris during installation | |
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| No additional chemical sealants or compounds required | |
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| Fast assembly suitable for high volume production | |
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| Operator independent controlled installation | |
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| Low scrap / rework cost | |
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| Uniform stress on the surrounding wall | |
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| Reliability & safety in variable fatigue, temperature, vibration conditions | |
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| PUSH-STYLE EXPANDER PLUGS | |
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| Pressure Rating: | Up to 450 bar (6500 psi) |
| Metric Sizes: | Ø 3.0-22.0 mm |
| Inch Sizes: | Ø 0.093-0.875″ |
| Materials: | Carbon steel, stainless steel, aluminum, titanium |
| PULL-STYLE EXPANDER PLUGS | |
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| Pressure Rating: | Up to 500 bar (7200 psi) |
| Metric Sizes: | Ø 3.0-18.0mm |
| Inch Sizes: | Available upon request |
| Materials: | Carbon steel, stainless steel |
The Right Solution for Your Sealing Challenge
KOENIG EXPANDERS are available in both push and pull style plugs to address a wide variety of installations including: high pressure systems, deep locations, or angled port applications. Our metal-to-metal sealing technology eliminates the potential for leaks associated with O-rings, gaskets, balls, and other conventional sealing products.
Easy, Debris-Free Installation Saves Time and Money
With a one-piece design and a variety of manual and automated setting tools, SFC KOENIG components allow for quick, easy installation without the risk of contaminating or damaging surrounding systems and materials. Plus, KOENIG EXPANDERS are:
- Precision manufactured with liberal tolerances and a smart design that eliminates installation errors
- Ready-to-install without reaming, tapping, threading, or supplemental sealants
- Uniquely suited to high-volume production
- Cost-effective through the reduction of overall labor, parts and waste
- Customizable – we can produce customer-specific plugs for your application
Our Team is Ready to Meet Your Needs
Founded in 1927, and the original inventor of the one-piece metal-to-metal sealing solution for drilled holes and ports, SFC KOENIG offers decades of experience in sealing and flow control applications. We provide global sales with local engineering support, and our expert team can assist in the selection or development of components for your unique application.
Tell us about your metal-to-metal sealing challenges and requirements and request a quote to get started.
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