What size air compressor do I need for my air plasma systems?

All plasma manufacturers include minimum air flow and pressure requirements in the owner’s manual. These requirements differ between systems, but as an example, a Hypertherm Powermax 45 requires 6 cubic feet per minute (cfm) at 90 psi. If you plan to use your system for hobby or for cutting an occasional piece of steel for a project, then an air compressor with a cfm rating slightly higher than the plasma will likely be adequate. If you do a lot of cutting, or plan to cut thick plate, we recommend using a compressor that is 1.5 to 2 times the plasma system requirement.