Air compressors are classified according to their discharge pressure.
Compressors delivering air at a discharge pressure not exceeding 150 psi (pounds per square inch) are typically designated as low-pressure compressors.
These low-pressure units find common application in general air supply, small pneumatic tools, and basic industrial uses.
In contrast, medium and high-pressure compressors function within significantly higher pressure ranges, suited for demanding or specific applications such as gas storage or powerful pneumatic tools.
The designation "extreme" is not standard in air compressor categorization.
Therefore, an air compressor operating at 150 psi or below is accurately classified as low-pressure.