A typical air compressor will produce air with a dew point as high as the compressor room temperature.
Refrigerated air dryer dew point.
What to look for when buying one.
The compressed air is cooled in an air to refrigerant heat exchanger to about 35 f a temperature where the moisture condenses and is drained off.
Refrigerated dryers can make the air reach dew points around 36 degrees f but it cannot achieve a dew point below freezing.
Optimally designed refrigerated dryers can produce air with dew points to approximately 36 f 2 c.
Example of a refrigerated compressed air dryer.
They can get dew point to as low as 40 degrees below zero.
There are a few key points to keep in mind when shopping for a refrigerated compressed air dryer.
That means that there s still some water vapor leftover in the air.
This one is installed after a rotary screw compressor atlas copco ga37 37 kw compressor.
One of the benefits of a desiccant air dryer over a refrigerated dryer is that it can operate at a consistently low dew point.
Class 4 delivers a pressure dew point of 38 f.
On the control panel you see a start stop button and the dew point indicator.
It is not possible to achieve dew points below freezing with a refrigerated dryer.
Refrigerated dryers should not operate below the class 4 range because the water vapor will freeze in the dryer.
If your application requires ultra dry air iso quality classes 1 2 3 or is likely to operate in below freezing conditions this is the best option for your compressed air system.
Desiccant air dryers absorb water vapor from the air stream and can drop dew point significantly more.
The compressed air leaving the dryer has a pressure dew point of 35 to 50.
The highest pressure dew point for a refrigerated dryer is class 6.
An ideal solution to the problem of compressed air applications that are sensitive to dew point is to use air compression systems with dryers that can remove moisture from your compressed air.
The air is then reheated in an air to air heat exchanger by means of the incoming air which also is pre cooled before entering the air to refrigerant heat exchanger.
This means that the compressed air leaving the dryer has a pressure dew point of 35 to 40 f.
Refrigerated dryers work by cooling the air to low temperatures and condensing much of the water vapor.
A regenerative desiccant dryer typically delivers a dew point of between 40 c 40 f and 73 c 100 f a refrigerated dryer delivers a dew point not lower than approximately 2 c 35 f a deliquescent dryer delivers a dew point suppression that fluctuates with air temperature.
They can usually produce air that has a dew point no lower than 5 degrees celsius 41 f.
An air to air heat exchanger is used to both pre cool the incoming air and re heat the outgoing air as it leaves the dryer.
What is a refrigerated air dryer.
