Hermetic Sealing Technology

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

Fast Fixtures With 3D Printing

One of the key elements of a good lean manufacturing system is the ability to spin up new work cells quickly. In our case, spinning up a new cell requires us to create all kinds of custom fixtures and other tooling.

Given the broad mix of products we make, custom fixtures have become second nature to us. And we have a talented group of in-house toolmakers who can turn out machined fixtures and other workholding devices in a flash.

Rack Design Prototyping

Yet, because we live and breathe lean manufacturing here, we're always looking to become even more efficient at tooling production. That's where 3D printing comes in.

Our engineers are now using 3D printing to create custom inserts that function as part of a hybrid fixture—which also includes a machined structural or support component.

The ability to create the inserts as part of CAD design workflow and combine them with interchangeable support components has shaved days off our tooling process.

The biggest beneficiaries of 3D printing have been our customers—because the faster we can tool up, the faster we can start shipping your parts.

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.

Download The White Paper

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


Get The White Paper

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.

Download The Application Note

Douglas Electrical
Address:    5 Middlebury Blvd.
Randolph, NJ 07869
Tel:    973.627.8230
Fax:   866.206.6916
General inquiries:   contactus@douglaselectrical.com
T 973.627-8230
Technical information:   applications@douglaselectrical.com
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Engineered Hermetic Seals and Connectors for Wire and Cable

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