The Atmos Chrást s.r.o. company’s key activity is manufacture of screw compressors. This includes development, construction and production of screw air-ends which is technically extremely demanding as well as demanding for a production. From the very beginning we have given a considerable part of our means to the next development and education of our employees. Thanks to that we can have a high innovative potential. We currently manufacture screw air-ends B100, B100L and the newest, 5th generation A150 air-end which was developed in a cooperation with London University. We used screw air-ends in our electrical and portable compressor range. Stable electrical series are distinguished according to their rated power Albert from 3 kW to 20 kW, SEC from 22 up to 30 kW and then the new one Smartronic from 30 kW to 90 kW, with frequency inverters and integrated fusion dryers. Into screw compressors belong also portable diesel compressors: serie PDP, PDC, PDK and PB. Its rated air delivery is from 2 m3/min to 25 m3/min, these machines have engine Perkins, Caterpillar, Kubota or Vanguard. Atmos also has more than 50 years of experience with serial production of locomotive breaking system compressors. These machine are from 25 to 300 m3/min.