The KOENIG EXPANDER® plug is designed to effectively seal drilled holes in fluid systems. With more than five billion units installed and with field failure rates less than 1 PPM, these plugs provide proven performance and an industry-leading metal seal.
Compared to other expander seal solutions, KOENIG EXPANDER® plugs consistently exceed performance expectations, providing a precise and reliable solution, often at the lowest cost when compared with competitors. 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). Standard push-style and pull-style expander plugs can steadily work at pressures up to 450 and 550 bar respectively, 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. It can be custom-configured to meet the needs of virtually any application.
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.
Sleeve: Stainless Steel
Harden Steel Zinc Plated
Ball: Stainless Steel and Bearing Steel
Pressure to Max: 450 bar
Size: 3-22 mm
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.
Sleeve: Case Hardening Steel
Mandrel: Heat Treable Steel
Pressure to max: 500 bar
Sizes: 4-10 mm
More than 5 billion parts installed worldwide!
