or vapor phase, can cause a variety of operational problems for users of compressed air. These include freezing of outdoor air lines, corrosion in piping and equipment, malfunctioning of pneumatic process control instruments, fouling of processes and products, and more.There are various types of compressed air dryers. Their performance characteristics are typically defined by the dew point.Refrigerated air dryer is one type of them.It delivers a dew point not lower than approximately 35 °F (2