FREQUENTLY ASKED QUESTIONS

Quite often we receive questions from our customers that are relevant either to others in our network or of interest to other visitors to our site. Here you will find the answers to those questions and information on the various features of our extensive product portfolio and its application in industry.

If the answer is not here then please send us your query using our Contact form. We are always happy to answer any question concerning sealing and flow control technology.

Select a topic below and then click the plus box beside each question to read the answer.

WHAT ARE EXPANDER PLUGS?

Expander plugs feature a serrated sleeve which expands into port walls during installation, forming a secure metal-to-metal seal without the use of chemical sealants or compounds. The original inventor of the one-piece expander seal solution, SFC KOENIG® offers two styles of expander plugs: push-style expander plugs and pull-style expander plugs. Push style plugs utilize an integrated ball to expand the serrated walls of the plug into the base material, and require a counter-bore drilled hole. Pull-style plugs utilize an integrated mandrel, and are ideal for angled channels, deep hole installations, and do not require a counter-bore. While each expander plug design offers distinct benefits based on installation location and system configuration, both provide unmatched reliability, with failure rates less than 1 PPM, flexible tolerance allowances, and proven performance in a wide variety of critical applications.


HOW ARE KOENIG EXPANDER® PLUGS DIFFERENT FROM OTHER EXPANDER SEAL OPTIONS?

Compared to other expander seal options, KOENIG EXPANDER® plugs provide unmatched reliability and a track record of superior performance, helping customers improve the total value of their sealing solution. The original inventor of the one-piece expander seal design, SFC KOENIG® utilizes advanced, automatic manufacturing technology to produce parts with precise capabilities. With over 5 billion parts installed,  KOENIG EXPANDER plug products are proven to successfully perform even in installations with vibration, pressure spikes, contaminants, and harsh operating environments. KOENIG EXPANDER plugs support temperature tolerances which surpass many other seal options, with operating temp ranges from -40°C to 150°C (-40°F to 302°F). Our seals are also available in a wide variety of standard material options and plug sizes, and can also be custom-developed to meet your specific application requirements.


WHAT IS THE DIFFERENCE BETWEEN KVT-KOENIG AND SFC KOENIG?

SFC KOENIG is the new identity of KVT-Koenig. Even though we have changed our name and logo, our focus and our commitment to providing superior engineering solutions for sealing technology and control systems remains the same. Our new name supports our position as the world’s leading supplier of sealing and flow control solutions.


HOW DO I CONTACT AN ENGINEER AT SFC KOENIG?

Our contact form can be found in the upper section of the website. In addition to standard information, please provide as many details as possible regarding your project so one of our engineers can assist you. We will contact you within one business day after form submission.


WHEN WAS SFC KOENIG FOUNDED?

The roots of SFC KOENIG lie in a flexible and innovative company, which was founded by Dr. Max Koenig, who received his PhD in Engineering in 1927. The company was originally focused on sheet metal processing, though throughout the years its capabilities and products expanded. In 1985, it was renamed KVT-Koenig AG. In 2014 the company again changed its name and brand to SFC KOENIG, to better reflect its position as a provider of the world’s leading sealing and flow control solutions. The company is proud of its successful and innovative past, and is excited about the future.


IN HOW MANY COUNTRIES IS SFC KOENIG ACTIVE?

SFC KOENIG is a global provider of products and solutions for sealing and flow control. Our core applications are in the transportation sector, in fluid control technology and precision engineering. We have main logistics centers in the United States, China and Germany, and our headquarters is located in Switzerland. With two production sites – in Switzerland and in the US – we are able to provide the highest level of service and efficiency. In addition, we have numerous distribution partners around the globe. More on our Global Presence.


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