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Air compressor - F120

One F120 air compressor with 7 bar was manufactured in 1953 and has been running in a local steel plant round-the-clock until 2007. At that time it represented a solution to produce compressed air with a revolutionary technology as it replaced a piston compressor with inter cooling. Finally, after 54 years of operation, a new Pneumofore unit was installed.


Vane vs Piston Compressor in 1923The air compressors manufactured since 1923 in by Swiss engineers were the world's first, single stage, rotary air compressors. The mission of Pneumofore was to introduce rotary vane technology to replace piston technology. As shown in the drawing on the below, the aim was to have much lower space requirements, less moving parts, lower rotation speed, easier handling, less maintenance and all over higher efficiency. With 750 rpm, the F120 had no mechanical stress and managed to compress air from atmospheric pressure to 7 bar, without inter cooling. The direct coupling was a key feature, no gear boxes were required 85 years ago. The active sealing of piston compressors is found in vane compressors too, as the function of the piston rings correspond to the one of the vanes.

If the mentioned F120 air compressor, a thermodynamic machine with energy conversion from electric to pneumatic, had been a car engine running at average 100 km/h, for 8.500 h/year, it would have done 46 million km, thus 1.146 times around the world's equator, which measures 40.055 km. Such extraordinary reliability over decades was not an exception, when compared to piston technology, which is still used today as highly evolved machinery in every car engine. The simple geometry of piston and vane machinery makes overhaul operations easy, a lathe is sufficient to execute also major repair jobs. This explains why some Pneumofore rotary vane compressors are installed in remote areas, from the heart of Brazil to the desert of Libya, where OEM independence is crucial, where only heavy industrial machinery survives over decades, while modern, sophisticated, high tech electronic devices frequently fail without chance of service.

Air Compressor - F120 nr. 5835 data sheetUnfortunately, the most popular compressor technology today is screw. The geometry of a screw makes repair jobs impossible, after 50.000 h of operation the screws usually need replacement, causing costs up to 50% of the initial price. Screws have no active sealing, most are driven by a gear box and there are at least 6, if not 10, bearings where piston and vane compressors need only 2. More moving parts increase the risk of any failure, the simplicity of reliable and durable vane compressors was surpassed by the fashionable, but in terms of Life Cycle Cost very expensive screw compressors, which only have a low purchasing price tag. Pneumofore is anytime and anywhere ready to compare the efficiency of its machinery with any alternative technology, but with a sight over decades, not few years only, as the resources of our planet are limited.

November 2009

SEE ALSO
  • Compressors in Mines
    Compressed air in explosive areas of Polish underground mines with rotary vane replacing screw
  • Air Compressors
    When the air end is the most durable part of a compressor, it is a Pneumofore machine
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ROTARY VANE BY PNEUMOFORE

simple, reliable & durable

Direct coupling means few moving parts, low rotation speed, low temperature. This virtually eliminates repairs and ensure superior reliability and longevity.

high energy savings

Air cooling through vertical layout, direct coupling, and intensive oil injection can result in up to 70% less power usage than other systems.

designed for extremes

Tested and proven for high performance in desert and tropical climates and available for special requirements like explosive gas or food safety.

low cost of operation

Low maintenance, negligible repairs, high energy savings and high reliability (no production downtime) make this the least costly long-term option available today.

easy to install and run

Ready-to-use turnkey system with optional Variable Speed drive. No foundation or water needed. Compact footprint with heat recovery. ISO 9001 and ISO 14001 certified.

first class support

Each unit comes with integration engineering and a 5-years warranty. Extraordinary and regular service by Pneumofore certified professionals is available worldwide.
LEARN MORE ABOUT ROTARY VANE TECHNOLOGY
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