'H' series compressors are used for Air or Nitrogen compression. Each compressor is an air-cooled, single acting, three or four stage-reciprocating piston compressor with the combination of oil pressure fed crankshaft bearings, and cylinder oil splash with regulated injection for the final high-pressure piston plunger design.

Performance with inert gases, such as Nitrogen, ranges from 10 to 150 Nm^3/h within a final pressure range of 100 to 350 bar including the Sauer unique NitroFlex integrated 'all-in-one' – Compressor, generator and gas booster.

'W' series compressors are oil-lubricated, single acting water-cooled piston compressors for air or inert gas compression in two or three stages from 10 to 100 bar with gas flow-rates from 65 to 400 Nm^3/h.

'LB' series inert gas boosters are dedicated nitrogen gas boosters that can accept suction pressures from 4 to 14 bar to deliver gas to a maximum of 40 bar. This single stage gas booster range is the result of years of trouble-free experience with the 'L' range.

'L' series compressor/boosters offer a wide range of gas flow-rates from 10 to 400 m^3/h at pressures to 40 bar in two or three stages based upon the established marine diesel air-start Sauer range of two and three stage oil-lubricated, piston compressors. Even as air compressors they can be safely adapted for use in Ex-atmospheres to ATEX regulations

'G' series compressor/boosters have been engineered with a gastight crankcase ('special' double crankshaft seals and jointing) to prevent gas leakage, typically to less than 0.1 mbar per l/s, and are oil-lubricated, single acting reciprocating compressors with air-cooling. The 'G' series have similar performance to the 'H' series; for noble gases such as Helium, Argon and Neon, and hazardous gases such as Carbon Monoxide, Hydrogen and Natural Gas. The combination of oil pressure feed to the crankshaft bearings and oil splash for compression, with Sauer regulated oil injection system for the final piston plunger design, ensures high reliability. The ability to handle elevated suction pressure for both noble or hazardous gases, gives enhanced performance to final pressures between 20 to 40 bar reliably in three stages and from 100 to 350 bar in four stages within the gas flow rate range of 10 to 400 m3/h.