Hey guys....the repaint is going well, I guess in 3 years I forgot how much work it is....Im using a new gravity feed gun, HVLP...love it, it works very nicely...but I got some water in the primer(urethane) when I was spraying yesterday...none on the vertical areas, but some on the trunk and hood.Seems it only came out when I tipped the gun downward. As I remember, I didnt have that problem with the old compressor...I drain the tank before I start, but I want to take care of the problem before I spray the metallic and clear coat (the primer I can deal with) Are the filters, or traps, that go at the inlet to the gun going to be enough? I have a moisture trap at the outlet of the tank, but obviously not enough. Thanks , John

You didn't say what kind of compressor you are using, but whatever size/kind it is, water traps should be placed "downline" from the compressor. When the air comes out of the compressor, it's at it's highest tempurature. The air must cool before the water will begin to form; therefore, a water trap on the compressor does little good. An alternative to an expensive refridgerated air dryer is to simply use a 50' hose as a crude condenser between the compressor and the first water trap, then another 50' hose from the trap to the gun. A small water trap at the base of the gun alone won't adequately remove water regardless of what compressor you are using.

A compressor that runs most of the time to keep up with air demands gets hotter thus producing more condensation. Add high humidity to that equation and it equals a bunch of water. I use two water traps on mine and still have to pay attention that they don't overflow.

Vettefella, thanks...I wondered if that might work (the extra line) I'll hook that up today, I have another length sitting there that I never used, just have to get the fittings...The compressor is a Craftsman, 6 hp, 33 gal....it will keep up with the sprayer, but it runs a lot...so heat like you said. Makes sense. Like I said, I have to sand the primer anyhow and add a little more in a couple places, so its not a big deal now...but I dont want it later!! Im using the tinted primer, Its great....what a difference. John

You will get even better heat transfer by using aluminum or copper tubing for your cooler. Immersing the coils in a bucket of cooled water will knock out 99% of the vapors, make sure to put your water trap down line from the condenser.

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Rod

67 396
SS clone

Daddy's Red Car (http://www.geocities.com/rthlc/index)