integrated in the housing 8 leakage of compressed air from the filter is prevented u2014 where required u2014 by o ring seals 19 the filter element of fig2 differs from the one of fig1 in the arrangement of a part circular guide element 20 at the mouth of the channel 15 leading into the filter interior the guide element deflects the air flow which enters the filter interior laterally obliquely i e not centrally as a consequence of the s shaped course of the channel 15 in a direction in parallel relationship to the length axis of the filter element 7 the guide element 20 thus enables a better distribution of compressed air across the entire filter surface fig3 shows a second embodiment of a filter according to the invention which differs only insignificantly from the embodiment of a filter shown in fig1 as far as function and basic configuration are concerned in correspondence with the filter of fig1 the filter shown in fig3 has a filter top part 101 with a pressure resistant housing 108 of aluminum and connected attachment flanges 103 104 an insert 109 of plastic is arranged in the housing and has an inlet channel 105 and an outlet channel 106 as well as.