Hermetic Sealing Technology

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

Wire Bushings For Hazardous Locations

To design safe electrical systems for hazardous locations, you’ll have to pay close attention to each and every electrical component that you use—including any wire bushings.

It may be easy to overlook these bushings or conduit sealing hubs since they’re typically just one, seemingly minor part of a more complex electrical system. But these components actually play an outsized safety role in hazardous areas. Applications ranging from liquid natural gas (LNG) handling to factories with combustible dust all have a need to prevent leaks around wires that pass through pressure walls, ensuring safety and compliance with agency requirements.

In the past, it was difficult to find feedthroughs and wire or line bushings that you could customize to your needs while meeting UL and other compliance standards for hazardous locations. Now, however, there’s an approach to feedthrough and wire bushing design that makes it far easier to meet all the relevant regulations without sacrificing design freedom. The key to this approach involves the use of epoxies to create hermetic seals around the wires.

Learn more in our latest technical update.

Wire Bushings for Hazardous Locations White Paper

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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.  


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