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ELGI Sauer Advantages

Protection

Three Stage
Design

Classic Monitoring

1,800 rpm –
a normal speed for Sauer

Axis Fan
Wheel

Real Water Cooling

Easy Maintenance

Technology Beats
Design & Costs

Protection

Thanks to the air-cooled, three-stage design or the fully water-cooled cylinders, the temperatures of surfaces are well below those found in other designs, which consequently require full covers.

At the same time, intrinsic technical features protect the crew from any rotating parts, whilst allowing instant visual checks of all functional parts since, no cover needs to be removed.

Three Stage Design

Developed back in the 1970s, the three-stage, air-cooled compressors have been gradually upgraded, taking into account the experience gained through more than 3,000 units delivered every year and the constant feedback from the shipping community. The partition of the 30 bar in three stages result in lower stage pressure ratios and consequently lower compressed air temperatures. This leads to considerable longer maintenance intervals.

At the same time, the units are easy to integrate and install. Shipyards estimate the costs with $7,500 for a post-Panamax container. With their advanced, state-of-the-art design, the three-stage, air-cooled compressors are the ideal choice for starting-air applications.

Classic Monitoring

A ship is not a computer which can simply be re-booted. All Sauer compressors are therefore equipped with classic monitoring devices such as thermometers and pressure gauges. These provide the crew with comprehensive information on the compressor’s running state, at a glance. If necessary, electronic monitoring systems can be installed, in addition to the classic monitoring.

1,800 rpm – a normal speed for Sauer

Sauer developed and began delivering compressors with speeds of up to 1,800 rpm back in the 1970s. Although the piston speed never exceeds 6 m/s, such compressors require different technical features to ensure safety and reliability – the prominent features of Sauer Compressors. These features have been tested and optimised under extreme conditions, taking into account the experience gained during more than 100 million operating hours.

Axis Fan Wheel

We use only fully-covered axial fan wheels for our three-stage air-cooled compressors. These produce much less noise and offer increased cooling capacities in open configurations, compared to radial fans which can produce higher pressures but require a full cover for reliable cooling.

Real Water Cooling

If you require water-cooled compressors, you need fully water-cooled units rather than compressors, wherein only the intermediate coolers are cooled by water and the cylinders by air. Such a design only has advantages for the manufacturer, who can use the same parts for air and water-cooled designs. This reduces the costs involved but leaves the ship’s crew with an unfavorable compromise.

Easy Maintenance

Sauer compressors are easy to maintain. 4 simple maintenance routines and the Easy Care Concept allow even inexperienced crews to carry out the work, when necessary. The maintenance intervals are fixed and are guaranteed including safety margins. However, we are of the opinion that the systems to monitor the intervals electronically can never replace the responsibility and experience of the ship’s crew.

Technology Beats Design & Costs

During the evolutionary development of our starting-air compressors, we had to make resolute decisions on many issues. A few of which were,

  • Should we save money to be more competitive at the yards but at the same time sacrifice reliability?
  • Should we offset technology with design?

The answer in both cases was “No”!

Our main design principle always has been and always will be driven by technology and reliability, as this has formed the basis for the success of Sauer compressors in the past.