The most vulnerable part of the VPSA Oxygen Generators concentrator is the compressor that draws air into the unit and then packs it into a smaller amount of space before pushing it into the chamber housing the zeolite crystals. As with many other things, modern compressors are not as well built as older ones.

If you can, carefully study the compressor systems in different concentrators, and then find out if there are working vintage models that can be substituted into the system. Even though you may have to adapt some of the fittings, it is well worth the effort. Being able to replace the compressor can easily extend the life of the concentrator from just a year or two to well over a decade without much need for other kinds of repair.

It can be said that concentrator reliability also comes down to good maintenance and being aware of the kinds of problems that can occur. When it comes to survival scenarios, fuses and IC circuits will always be a problem if an EMP occurs. Since many of these circuits control the opening and closing of purely mechanical valves, it may be possible to use gravity based levers or pulley systems to manually open an close the valves at proper intervals.

In Classical Greece, there was a “robot” that was able to mix proper concentrations of wine and water without using any kind of electricity, and if you do some experimenting, you can find a way to achieve this goal.

If you do not want to ruin a perfectly good concentrator, buy an old one that is no longer functional. You will learn plenty about how the system works, as well as how to improvise and develop work arounds for areas that might be weak points during a survival scenario.

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