Compression ratios up to 4:1 can be achieved in a single stage, producing 3 barG from atmospheric suction. Machines are often packaged in two stages to achieve pressures up to 7 barG, or are used as boosters. Depending on the duty, packages are either air or water cooled, using either site water or an integral closed circuit cooling system. Wet and dirty gases can be handled and a range of coatings can also be applied to deal with corrosion.
