Desiccant Air Dryer
Why is it necessary to dry compressed air?
The atmospheric air drawn into a compressor is a mixture of gases that always contains water vapour. However, the amount of water vapour that air can carry depends on the temperature. As air temperature rises – as happens during compression – the air's capability to hold moisture increases also. When the air is cooled, its capacity to hold moisture reduces which causes the water vapour to condense. This condensate is then removed in the centrifugal separator, or the air receiver, downstream from the compressor. Even then, the air can still be completely saturated with water vapour. This is why, as the air cools further, significant amounts of condensate can accumulate in the air distribution piping and at take-off points. Therefore, additional drying is essential to avoid production downtime and interruptions, as well as reduce costly maintenance and repair work.