INGERSOLL-RAND build a range of Piston Compressors, classed as NON Loube Compressors. These are Pumps which still have oil in them but have Non Lubricated Cylinders which prevents oil from being carried over down your air line. These range from 1 HP to 15 HP, flow rate from 3.5 CFM to 49.7 CFM. These Units provide instrument quality air at lowest possible overall cost and high reliability.