Hermetic Sealing Technology

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

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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New Cryogenic Feedthrough Improves Ease-of-Use

Epoxy-based hermetic feedthroughs have worked well in cryogenic systems for years. But the design modifications needed to operate in these extremely cold temperatures increased the size of the feedthrough and limited your mounting options. We recently eliminated these issues with an entirely new approach to cryogenic feedthrough design.

Intended for use in space simulation, laboratory and liquefied natural gas systems (LNG), our new cryogenic feedthroughs do away with a bulky compression system found on previous designs. Our new design also supports all the common feedthrough mounting styles—including threaded, welded, bolted or vacuum conflat.

In our new white paper, we’ll take a closer look at this cryogenic feedthrough technology and some design strategies such as:

Cryogenic Feedthrough
  • Overcoming coefficient of thermal expansion issues.
  • Finite element analysis (FEA) simulations to optimize the design of the epoxy-metal interface.
  • True hermetic performance in challenging conditions.
  • Easy implementation in a variety of cryogenic systems.


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