The air dryer freezes the water in the compressed air below the dew point, so that it precipitates from the air, in the water and oil discharge to retain the clean compressed air, its role is to remove water and oil.

So why should the nitrogen machine be equipped with a freeze dryer?
Because the nitrogen machine is most afraid of water and oil, water and oil into the nitrogen production opportunity to block carbon molecular sieve molecules.
It affects the service life of the entire nitrogen system equipment, affects the purity and flow of nitrogen, etc., so the frozen dryer is a necessary equipment for the nitrogen machine.

In order to ensure the discharge of clean water and oil of course need to do some maintenance
1. Whether the power supply voltage, phase number and frequency meet the requirements.
2. Check whether the pipe connection parts of the system are locked.
3. Check whether the refrigeration system pressure of the machine is normal
4. Whether the dryer is properly placed and the ambient temperature meets the requirements of use.
5. Check whether the ball valve at the front of the automatic drainage valve is open.
6. Check whether the inlet temperature of the dryer exceeds the specified value.