Air compressors are classified into how many classes?

Air compressors are classified into three main classes based on their operational principles and designs: positive displacement, dynamic, and specialty compressors.

Positive displacement compressors function by trapping a volume of air and mechanically reducing its size to increase pressure. This category includes reciprocating compressors and rotary compressors. Dynamic compressors, on the other hand, use rotational energy to compress the air, commonly found in centrifugal and axial compressors. Specialty compressors includes various designs that cater to specific applications or requirements, such as rotary screw compressors.

Understanding these three classes is essential for machinists, as each class has distinct applications, efficiency characteristics, and maintenance requirements. This classification helps technicians choose the appropriate compressor for a given application, ensuring optimal performance and reliability.