Apparatus, devices and machines for air treatment, including for compressed air conditioning, mainly for the separation and deposition of solid and/or liquid contamination of the compressed air; air filtering installations; air purifying apparatus and air purifying machines; air dryers, including compressed air dryers; desiccant (adsorption) dryers; refrigeration dryers; membrane dryers; drying apparatus and drying installations; drying devices; refrigerating apparatus, refrigerating machines and refrigerating installations; air cooling devices; air coolers, including compressed air coolers; condensate drains for compressed air applications being parts of refrigerating devices; heat exchangers, included in class 11; apparatus and machines for the treatment of condensate water by means of purification and/or filtration; air filters for air conditioning; filters being parts of household or industrial installations; filter systems, including air filtering installations; compressed air filters; dust filters for use in compressed air installations; air purifying lamps having a germicidal effect; apparatus and devices for the sterilization of air; regulating and safety accessories for gas devices; taps for pipes; safety accessories for compressors, namely protective switches, pressure switches; compressed air reservoirs being parts of the aforesaid goods of class 11; parts of all the aforesaid goods, included in class 11.