High pressure moisture filters work on the output of compressors because the moisture is more concentrated. If you can keep moisture from getting into the compressor, you're much better off. Some big compressed air facilities use things like refrigerated dryers on the high pressure side (usually just "house" air pressure) to drop the moisture out at 0 deg. F, or so. For a hand pump, having a moisture filter on the output of the pump isn't practical. Any decent sized moisture filter would be larger than the reservoir of most guns, and you would double the pumping strokes needed to fill the gun. In a large, low pressure desiccant filter, the air would would stay in the filter long enough to get the moisture out.
|This message has been edited by DougWall on Jul 15, 2017 9:52 PM|