Hermetic Sealing Technology

Read about news, technical breakthroughs and design best practices related to hermetically sealed wire feedthroughs and hermetic connectors.

Switchgear Insulation Changes Favor Epoxy Feedthroughs

With medium-voltage switchgear, progress is being made with regard to finding alternatives to SF6 as an insulation gas. Designs that incorporate dry air or a mixture of fluoroketone, nitrogen and oxygen as the insulating gas are being explored to minimize environmental impact. Oil, vacuum and CO2 are other alternatives to SF6.

Regardless of the type of insulation, it is important that all individual components used within the switchgear assembly can withstand harsh environments, temperature extremes and regular submersion in water. Among these components are the hermetic feedthroughs carry conductor wires in and out of the gas-insulated cavity.

Already a dominant choice for switchgear applications, epoxy-based hermetic feedthroughs are poised to become even more popular as a variety of SF6 alternatives come into play.

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Read our latest white paper for more detailed look at how various switchgear insulation gases affect feedthrough performance.  


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Integrated Epoxy Feedthroughs Improve Fuel Pump Reliability

Of all the design decisions that affect the operation of an in-tank fuel pump, the way you seal the pump housing may top the list. A bad seal will allow liquid fuel to work its way into the housing, which will eventually corrode the electronics and potentially cause a risk of fire. Given the importance of these seals, it’s surprising that many self-contained fuel delivery systems still use o-ring assemblies to seal the power and signal leads that pass though fuel pump housing.

A more effective way to seal fuel pump wiring involves the use of epoxy-based feedthrough technology. Epoxies have a number of advantages in these applications—not least of which is best-of class resistance to all common fuels and other chemicals. The use of epoxy wire feedthroughs for fuel pumps isn’t exactly new. We’ve shipped more than a million fuel pump feedthroughs for all kinds of automotive, commercial aviation, aerospace, heavy equipment, recreational vehicle and small engine applications.

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