Log-InSearchContactLanguage Leader in Sealing & Flow Control Technology Menu Home /RELIABLE EXPANDER SEALS. PULL TYPE PLUGS AND PUSH TYPE BALL EXPANSION PLUGS / Expander Plugs - All About KOENIG EXPANDER® Products EXPANDER PLUGS - ALL ABOUT KOENIG EXPANDER® PRODUCTS The KOENIG EXPANDER plug is designed to effectively seal drilled holes in fluid systems. With more than 5 billion parts installed and field failure rates less than 1 PPM, these plugs provide proven performance and an industry-leading metal-to-metal seal solution. Compared to other expander seal options, KOENIG EXPANDER plugs consistently exceed performance expectations, providing a precise and reliable solution, often at the lowest total cost. These plugs feature a one-piece, easy-to-install design that integrates with automated manufacturing operations, and are available in a wide range of material options and plug sizes. KOENIG EXPANDER components tolerate one of the widest temperatures ranges of any expander plug option in the market, with effective operation from -40°C to 150°C (-40°F to 302°F). Push-style expander models and pull-style expander seal models permanently resist pressures up to 450 and 550 bar, and are pressure rated with safety factors to accommodate system shocks and pressure spikes. The KOENIG EXPANDER plug is one of the most dependable and customizable expander seals in the market and can be custom-configured to meet the needs of virtually any application. FIND YOUR PART OR REQUEST PRICING INSTALLATION KOENIG EXPANDER plugs use our unique metal-to-metal seal design, which eliminates the potential for leaks commonly associated with other traditional expander seals, such as O-rings and gaskets. With a one-piece design, KOENIG EXPANDER® products provide clean fit and reduce the risk of installation errors. These expander seals eliminate the need for customer assembly, thread machining, tapping or reaming, providing significant savings in labor and production process costs while also removing the risk of contamination from metal chips or debris. In addition, the design does not require additional sealant or adhesive compounds, which further eliminates contamination risks. Ideal for a wide variety of applications, SFC KOENIG’s plugs are well-suited for deep-holes, angled channels and uniquely-oriented installations. PUSH-STYLE & PULL STYLE EXPANDER PLUG SOLUTIONS Two designs are available: a push style and a pull style. The difference between the two is mostly dependent upon the installation method. Push-style models require a hole drilled with a counter bore. The plug is dropped into the hole up to the counter bore and then a ball is pressed into a seated shell, which causes serrated grooves to expand into the base material creating a tight, metal-to-metal seal. View our line of Push-Style plug products. >> Pull-style models do not require the hole to be counter-bored and instead use an integrated mandrel to insert the plug into a drilled hole. Since it can be easily aligned, the pull-style plug is often used for angled channels. This style of expander plug is also ideal for applications where holes are on different faces and it is difficult to move the block for proper orientation. View our line of Pull-Style KOENIG EXPANDER plug products. >> 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. CONTACT US SELECT BRANCH TO CONTACT NORTH AND SOUTH AMERICA SWITZERLAND GERMANY CHINA == OR CHOOSE A COUNTRY OR A REGION == ALBANIA ALGERIA AMERICAN SAMOA ANDORRA ANGOLA ANTIGUA AND BARBUDA ARGENTINA ARMENIA AUSTRALIA AUSTRIA AZERBAIJAN BAHAMAS BAHRAIN BANGLADESH BARBADOS BELGIUM BELIZE BENIN BERMUDA BHUTAN BOLIVIA BOSNIA AND HERZEGOVINA BOTSWANA BRAZIL BRUNEI BULGARIA BURKINA FASO BURUNDI CAMBODIA CAMEROON CANADA CAPE VERDE CAYMAN ISLANDS CHAD CHILE CHINA COLOMBIA COMOROS COSTA RICA CROATIA CURAÇAO CZECH REPUBLIC DENMARK DJIBOUTI DOMINICA DOMINICAN REPUBLIC EAST TIMOR ECUADOR EGYPT EL SALVADOR EQUATORIAL GUINEA ESTONIA ETHIOPIA FAROE ISLANDS FIJI FINLAND FRANCE FRENCH POLYNESIA GABON GAMBIA GEORGIA GERMANY GHANA GREECE GREENLAND GRENADA GUAM GUATEMALA GUINEA GUINEA-BISSAU GUYANA HONDURAS HONG KONG HUNGARY ICELAND INDIA INDONESIA IRELAND ISRAEL ITALY JAMAICA JAPAN JORDAN KAZAKHSTAN KENYA KIRIBATI KOSOVO KUWAIT KYRGYZSTAN LAOS LATVIA LESOTHO LIECHTENSTEIN LITHUANIA LUXEMBOURG MACEDONIA MADAGASCAR MALAWI MALAYSIA MALDIVES MALI MALTA MARSHALL ISLANDS MAURITANIA MAURITIUS MEXICO MICRONESIA MOLDOVA MONACO MONGOLIA MONTENEGRO MOROCCO MOZAMBIQUE NAMIBIA NAURU NEPAL NETHERLANDS NEW ZEALAND NICARAGUA NIGER NIGERIA NORTHERN MARIANA ISLANDS NORWAY OMAN PAKISTAN PALAU PALESTINE, STATE OF PANAMA PAPUA NEW GUINEA PARAGUAY PERU PHILIPPINES POLAND PORTUGAL PUERTO RICO QATAR ROMANIA RWANDA SAINT KITTS AND NEVIS SAINT LUCIA SAINT MARTIN SAINT VINCENT AND THE GRENADINES SAMOA SAN MARINO SAO TOME AND PRINCIPE SAUDI ARABIA SENEGAL SERBIA SEYCHELLES SIERRA LEONE SINGAPORE SINT MAARTEN SLOVAKIA SLOVENIA SOLOMON ISLANDS SOUTH AFRICA SOUTH KOREA SPAIN SURINAME SWAZILAND SWEDEN SWITZERLAND TAIWAN TAJIKISTAN TANZANIA THAILAND TOGO TONGA TRINIDAD AND TOBAGO TUNISIA TURKEY TURKMENISTAN TUVALU UGANDA UNITED ARAB EMIRATES UNITED KINGDOM UNITED STATES URUGUAY UZBEKISTAN VANUATU VATICAN CITY VIRGIN ISLANDS, BRITISH VIRGIN ISLANDS, U.S. ZAMBIA Customized for Your Application Since 1927 SFC KOENIG has provided unrivaled solutions that surpass performance and reliability expectations. Learn more about our: Engineering Support Customized Components Installation Solutions Technical Information KOENIG EXPANDER Plugs vs. Cup Plug Seals KOENIG EXPANDER Plugs vs. SAE Plugs Metal-to-Metal Seals for Automotive Applications GET THE FULL SFC KOENIG CATALOG Request a Copy SIGN UP FOR OUR NEWSLETTER Get the latest news and insights on sealing and flow control. Currently available for contacts in The United States and Canada. 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SOLOMON ISLANDS (NOT AVAILABLE) SOUTH AFRICA (NOT AVAILABLE) SOUTH KOREA (NOT AVAILABLE) SPAIN (NOT AVAILABLE) SURINAME (NOT AVAILABLE) SWAZILAND (NOT AVAILABLE) SWEDEN (NOT AVAILABLE) SWITZERLAND (NOT AVAILABLE) TAIWAN (NOT AVAILABLE) TAJIKISTAN (NOT AVAILABLE) TANZANIA (NOT AVAILABLE) THAILAND (NOT AVAILABLE) TOGO (NOT AVAILABLE) TONGA (NOT AVAILABLE) TRINIDAD AND TOBAGO (NOT AVAILABLE) TUNISIA (NOT AVAILABLE) TURKEY (NOT AVAILABLE) TURKMENISTAN (NOT AVAILABLE) TUVALU (NOT AVAILABLE) UGANDA (NOT AVAILABLE) UNITED ARAB EMIRATES (NOT AVAILABLE) UNITED KINGDOM (NOT AVAILABLE) URUGUAY (NOT AVAILABLE) UZBEKISTAN (NOT AVAILABLE) VANUATU (NOT AVAILABLE) VATICAN CITY (NOT AVAILABLE) VIRGIN ISLANDS, BRITISH (NOT AVAILABLE) VIRGIN ISLANDS, U.S. (NOT AVAILABLE) ZAMBIA HOME PULL-TYPE EXPANDER PLUGS FLOW RESTRICTORS ENGINEERING INDUSTRIES REQUEST QUOTE ABOUT PUSH-TYPE EXPANDER PLUGS CHECK VALVES ARTICLES LOCATIONS © 2021 SFC KOENIG AGImprintTerms & ConditionsPrivacy PolicySitemap HEADQUARTERS SFC KOENIG AG Lagerstrasse 8 8953 Dietikon, Switzerland Phone +41 44 743 46 00 sfc-info-ch@idexcorp.com EUROPE SFC KOENIG GmbH Max-Eyth-Strasse 14 89186 Illerrieden, Germany Phone +49 7306 2062 300 sfc-info-de@idexcorp.com AMERICAS SFC KOENIG LLC 73 Defco Park Road North Haven, CT 06473, USA Phone +1 203 245 1100 sfc-info-us@idexcorp.com ASIA SFC KOENIG Flow Control (Suzhou) Co., Ltd. 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