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I need to get the moisture out of my air from the air compressor. The filter I have on it is not getting it all out. Where do I get a dryer type filter. Need to do some painting but do not want the moisture to screw up the paint.
First off drain your compressor regularly. Water is removed from the air when it is cooled. The first place the air is cooled is your tank. After that the air is cooled in the airlines if you have permanent airlines. A coalescing filter will help remove some water but not all of it. There are a number of threads here and in the archives about getting the moisture out of compressed air.
use both a general purpose filter and a coalescing filter connected to the hose going to your spray gun. cool the air as much as possible before the filters. Graingers sells desiccant driers, they would work for low volume work and you need to reoplace the desiccant them, if you do alot of painting, you may want to consider a refrigerated air drier but they are exspensive, probably start a $900-$1000 for one with enough capacity to spray with.
Avanti,If you can get an old refrigerator, run your air from your tank through the refrigerator then out an into an automatic drain trap of sufficient size to hold at least a quart of condensate. Then connect a coalescing filter to catch any oil which might get that far down the line. You don't want any fisheyes.
A 50' coil of 3/8" copper tubing submerged in a container of water inside the refrigerator will work fairly well. The cooler you can get the air befor the refrigerator, the more efficient it will be. Try to cool the air right out of the compressor with an aftercooler, then to the tank will get most of the condensate. A good device for this is an old automotive condenser placed in front of the flywheel cooling fan of the compressor. Just hang it on the belt guard. An efficient aftercooler will get about 60% of the water out.
Wherever the water condenses you must drain it often or it will evaporate and continue down the line to condense out elsewhere.