100 to 700 HP Rotary Screw Compressors

SFC 75 to 515 Variable Speed Technology from KAESER KAESER SIGMA FREQUENCY CONTROL (SFC) rotary screw compressors are engineered to be the foundation of your demanding industrial application. Using the latest in Siemens drive technology, KAESER SFC units are able to meet varying demand while maintaining stable pressure control. The result is exceptional reliability and superior energy efficiency.

As a matter of fact, these units are up to 25% more efficient than the competition. Meeting varying loads Superior part-load performance Most compressed air systems have varying loads and it is often KAESER’s SIGMA FREQUENCY CONTROL (SFC) units more effective and efficient to apply multiple compressors to have superior part-load performance and make great trim meet changing demand. In cases where the demand profile load machines.

They can be easily integrated into a multi- changes more rapidly and frequently, variable frequency compressor system to provide faster response to variations in drive compressors may also be recommended. By varying the air consumption. At the same time, they can reduce electricity frequency of the input electricity to the motor, these compressors costs since their electrical consumption varies directly with air speed up and slow down to match their air output to your production.

demand. 5 psig), without wasting air by over using the lowest start up current (see Graph 2). They eliminate pressurizing the system (see Graph 1).

This also increases heat spikes in motor windings, allowing unlimited motor starts. Of reliability and product quality in your plant. course, frequency drives usually have fewer starts/stops, which means less frequent loading and unloading, for less wear and tear on important mechanical parts.

psig 110 109 Stable System Air Pressure 108 107 cfm 106 700 105 650 600 550 500 450 400 350 300 250 200 150 100 50 Variable Air Demand 0 5:30 6:00 6:30 7:00 7:30 8:00 8:30 9:00 9:30 Time Graph 1 Graph 2 2