Function diagram

How KAESER rotary screw compressors work

Atmospheric air is drawn through the inlet filter (1)into the airend (2) where it is compressed. The airend is driven by the electric motor (3) .
Specially developed SIGMA FLUID is injected into the airend to serve as coolant, lubricant and sealant. Under normal conditions the air reaches a temperature of only approx. 80°C during compression.
A three-stage separator (4) removes the cooling fluid from the compressed air. The fluid passes through the cooler, the micro-filter and back to the point of injection. A thermostatic valve (5) regulates and optimises the fluid temperature. The air emerges from the separator cartridge with a remaining fluid content of less than 2 mg/m³, passes through the minimum pressure check valve (6) and finally through the after-cooler (7).
In the after-cooler the air is cooled down to between 5 and 10K above ambient. Most of the moisture carried in the air condenses in the after-cooler and can then be removed in the downstream centrifugal separator. The air finally leaves the compressor at the outlet (8) .