Refrigerated air dryers are used to remove moisture from compressed air by cooling it to a temperature that causes the water vapor to condense into liquid form, which can then be removed from the air stream.

The refrigerated air dryers shell part typically refers to the outer casing or housing of the unit. This is the part of the dryer that encloses the internal components and protects them from damage or contamination. The shell is usually made of a durable material such as steel or aluminum, and may have various features such as mounting brackets, access panels, and drainage ports.

In addition to the shell, a refrigerated air dryer may also have other important parts such as a compressor, evaporator, condenser, fan, and control panel. These components work together to cool and dehumidify the compressed air, ensuring that it is clean and dry before it is used in pneumatic systems or other applications.