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How to Eliminate Sealant Contamination

Posted by Andy Marin on Wed, Oct 21, 2020 @ 08:51 AM

A common frustration we hear from manufacturers is that their vacuum impregnation process may seal porosity, but some parts still need to be scrapped due to sealant contamination (Image 1). Most of these manufacturers assume this is normal. The fact is that this is not normal, nor should it be accepted as a typical outcome of the vacuum impregnation process.

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Why Use Dry Vacuum Pressure Impregnation?

Posted by Andy Marin on Thu, Mar 09, 2017 @ 07:06 AM

To say that all vacuum impregnation processes are equal would be to say that every die casting process is the same. Nothing could be further from the truth. The vacuum impregnation process will have a direct impact on the sealing quality.

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Flocculation: Causes and Prevention in Vacuum Impregnation Process

Posted by Mubetcel Moorefield on Thu, Oct 04, 2012 @ 11:47 AM

In an aqueous environment small insoluble particles are kept in solution by physical forces. While temperature and velocity play important roles in solution stability, electrokinetic force is the biggest contributor. Most solids suspended in water possess negative charge. Because particles with similar charges repel each other, those particles with like charges choose to remain in suspension rather than clump together and settle out of suspension. Similarly, any circumstance that would result in reduced charges on the particles would allow them to gather into larger particles and eventually “floc”.

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Old vs New Vacuum Impregnation

Posted by Wade Fisher on Mon, Sep 17, 2012 @ 12:35 PM

The other morning I was walking the dog around 5:00 AM, and I noticed how exceptionally crisp and brilliant the stars were in the pre dawn sky, shining though the high pressure system overhead. While finishing the walk around the neighborhood, I thought about mankind’s worldview that the earth was flat as recent as 600 years ago and the reluctance of decision makers of that time, influenced by the rhetoric of naysayers, to accept anything other than the status quo.

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Variables to monitor in a DVP impregnation process

Posted by Ryan Symonds on Tue, Mar 06, 2012 @ 10:58 AM

The three most important variables to monitor in a DVP impregnation process to ensure that your system is operating to its fullest capacity are the vacuum, sealant and curing process.

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Vacuum Impregnation Processes

Posted by Chris Gilmore on Thu, Jan 12, 2012 @ 10:29 AM

Why does GW recommend the dry vacuum and pressure (DVP) process?

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