Air DryerAs we know, there are much more water vapor contained in the air. For instance, when atmosphere's temperature at 300C and relative humidity at 75%, if the air compressor (working pressure at 0.7Mpa) had running for 24 hours, there would be about 100L water out from the compressed air. So during the compressing course, the vapor (unable to see) will change into little drip (able to see) and stick on the inner surface of tank of the compressor and carry pipe. If this kinds of virgin air to be sent into blow molding machine without any drying processes to drive machine and use for making bottle directly, it will cause so many problems. At first, the vapor will appear on the inner pipe under the high pressure and eroded the steel pipe and pneumatic elements; second, as the PET resin have a strong character of hygroscopic, the otiose water will debase the finished bottle,s inside character and pollute the bottle to make us have to clean it again before putting into use.So, in order to avoid these problems, we should use air dryer to remove moisture contained inside of the compressed air before using. Its working course as following: At first, though the preposition refrigeration set, the compressed air, enters into the air dry, is carried though pre-refrigerate; then, though the preposition filter, most of the vapor water, oil fog and dust would be filter out. Then, the compressed air is sent into a close compressing and refrigerating system, in which it was refrigerated by compressor with compulsion to make the plenty of vapor change into liquid waterAt last, which could be completely filtered out by postposition precise filter under the cold condition, at the same time, the oil fog and dust included. It has the features of simplify structure, of facility installation and transport, of high efficient and so on.Main features1 Special back cooler and precooler, immediately access to air compression under80 ℃ 2 Equipped with high-performance, powerful refrigerant compressor, refrigerating after sufficient precooling, the processing air volume 30% larger than similar products, stable dew-point temperature, transforming 99% vapor into water fog and drop 3 The specially designed centrifugal and collecting-type dual waterseparator make the efficiency as high as 99% 4 World-class components, high quality, long operation life 5 Convenient to use, no expendable, fully automatic water drainage, low operation cost, capable of continuous operation ----------------------------------------------------------http://www.chinariway.com/Auxiliary_Equipment/Auxiliary_Equipment_Air_dryer_AD001.asp--------------------------------