At the beginning of the 70ies, Sauer & Sohn developed the 3-stage air-cooled compressor in collaboration with wellknown German shipping companies in order to cover the increasing demand for low-maintenance auxiliary machines used in international shipping – a branch which suffered considerable pressure of costs.

Due to the 3-stage air-principle, general advantages of the air-cooled system could also be used for bigger compressor capacities.

In addition, the division of the pressure ratio into 3 stages – instead of 2 stages as in traditionally used water-cooled compressors – considerably decreases compression temperatures.

The consequence: Even when standard mineral oil is used, as e.g. circulating oil in main engines, any carbonization of compressor valves belongs to the past.

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General advantages

Lowest compression temperatures due to division of the pressure ratio into 3 stages.
Cost reduction of up to 5,000 USD due to missing cooling water circuit.
Standard warranty period of 24 months.
Maintenance intervals of at least 2000 operation hours for the compressor valves.
Covered by warranty even when standard motor oil is used.
Reliable and safe to operate also at an ambient temperature of up to 60°C.