A compressor operating at lower output consumes less electricity.
Multi stage air compressor animation.
Multistage compression refers to the compression process completed in more than one stage i e a part of compression occurs in one cylinder and subsequently compressed air is sent to subsequent cylinders for further compression.
Reciprocating piston compressors use a cylinder to force air into a chamber where it is compressed.
In addition multistage compressors run much longer on cycles than one stage units which cycle on and off.
While straightforward this setup is limited in its efficiency and capacity for delivering high volumes of pressurized air.
Know about the effects of using a multi stage air compressor with inter cooling.
Reciprocating compressor diagram parts working multi stage compressor.