Apparatus, devices and machines 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, namely compressed air purifying apparatus and compressed air purifying machines; compressed air dryers; desiccant (absorption) dryers; refrigeration dryers; membrane dryers; drying apparatus and drying installations for use in compressed air installations; air cooling devices, namely compressed air cooling devices; compressed air coolers; condensate drains for compressed air applications being parts of refrigerating devices; heat exchangers, included in class 11, for use in compressed air installations; compressed air filters; dust filters for use in compressed air installations; compressed air reservoirs being being parts of the aforesaid goods of class 11; parts of all the aforesaid goods, included in class 11, for use in compressed air installations in connection with refrigeration dryers; all aforementioned goods for use with refrigeration dryers.