Posted: Sun Jan 13, 2019 7:41 pm
PaintDevil, I have no doubt that your planned setup will work. Lots of people have similar and are very happy.
It has always bothered me that the concept of aftercooling, i.e. cooling and condensing water in the air after it exits the compressor tank is somehow flawed. The air in the tank is full of moisture and while much of this condenses and sits in the bottom of the tank that, in itself creates another set of problems with rust and the need for constant draining, especially when working the system hard.
It's always seemed to me that a better way would be to cool the air and condense/separate moisture before it goes into that tank. To that end I've started making a copper line array similar, but not quite as long, that will sit between the compressor pump and the tank. It utilises copper line, like yours but ends in a small expansion tank which should separate the last of the moisture in the air before being fed into the main tank. I figure that I'll then have clean, dry air coming out, with only minimal moisture content. That, in itself will be a benefit, reducing the gunk buildup that seems inevitable in fittings downstream, before final filters and regulators.
My research showed that it isn't that uncommon, just needs a bit more work to set up and, of course, means that the installation is permanent. For me that's not an issue. The only thing that was a little difficult/expensive was sourcing a flexible line to run from the compressor to the pipe array, that was capable of handing the very high heat of the air as it first exits the pump.
What's interesting is that the systems that DarrelK linked actually work this way, cooling the air before entry to the tank, not after exit.