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CompAir has extended its portfolio of variable speed compressors with the launch of seven new models, to offer a comprehensive range of energy efficient rotary screw machines from 11kW to 250kW.

Energy-efficiency has been considered at every stage of the design of the new L11VS to L18VS range to ensure that the machines can meet the wide variation in air demand necessary in modern processes.
Each compressor features a variable speed drive that helps to minimise energy use, as the unit produces the right volume of air required by the factory network at all times.
A compressor with a greater range of volume output is generally more cost efficient to operate as the machine will automatically adjust, or ?turndown? its flow rate to the most economic level. Therefore, each machine in the new range is engineered to offer excellent performance, with a volume flow turndown that is considered to be up to 17 per cent greater than other comparable compressors.
With a compressor that has a limited flow range, the machine will typically go in to off load mode when it reaches its minimum flow. This is both inefficient and costly as the compressor continues to run, thereby consuming energy, with no output. In addition, the motor will be forced to stop and restart, putting additional wear on components and increasing overall cost of ownership through increased maintenance and energy consumption.
In contrast, CompAir?s L11 VS machine for example, can continue running at as little as 10 per cent flow at seven bar pressure, for maximum flexibility of operation and greater control over air usage.
The range is available in two frame sizes with a low noise level from 65-70 dB(A). This allows the compressor to be sited at the point of use, saving time and cost as there is no need to house the unit in a separate room or install additional pipework.tion by 2012.