Why is My Air Dryer Not Working?
Troubleshooting refrigerated dryers
Think of your air compressor as a “rain-maker.” At 100 psig, a compressor takes eight volumes of air and compresses them into one. At 80 degree F inlet air temperature and 80% relative humidity, a 100 HP compressor will take in 100 gallons of water vapor per day.
The compressor’s aftercooler can remove 60-70% of the moisture, but beyond that the compressed air coming out of the machine is saturated and it goes into your air system as condensed water vapor. As the air cools from the hot discharge of the compressor, the ability of the air to hold water is reduced by 50% for every 20 degrre F degree drop in temperature. The air moves downstream and as it cools, the water continues to drop out. This can add up to a lot of water.