I posted earlier about the issue of spraying CV. What would be the best way to remove water from my air source? I have a large compressor outside with a Devilbiss extractor at the compressor. From the extractor I run a 25' air hose to my Kremlin pump. Suggestions on what I should change/add? Also, what parts on the extractor should I maintain/replace? I've had it for awhile and haven't done anything to it.
From contributor J:
I'm just learning about this stuff myself, but what I've picked up is that typical extractors can only remove liquid water from the air, not vapor. Since your extractor is right at the compressor, a lot of the water is probably going right through it as vapor, then condensing into liquid further down the line. I've found more than one article indicating that the extractor should be at least 25 feet downstream from the compressor so that the vapor has time to condense before it gets there.
If that doesn't do the trick, there's additional equipment available. From cheapest to most expensive, you can add a desiccant dryer ($300), a membrane dryer ($700) or a refrigerated dryer ($1500+). I also saw a neat-looking product called an elliott-cycle dryer from a company called Air Options, but this is new technology and not much info seems to be available.
After the extractor you could place an inexpensive filter like the Motorguard M45 in the air line to clean up the air even more. One of those little filters that attach on the end of the spray gun will also work, but won't last as long.