with Preko-filter -selfcleaning more efficiency higher capacity longer filter use	drukomat® 30 plus   up to 30 m³/min   compressor capacity - 2 Endstagefilter   drukomat® 31 plus   up to 40 m³/min   compressor capacity - 3 Endstagefilter
drukomat® 15 plus   up to 15 m³/min   compressor capacity	drukomat® 61 plus   up to 60 m³/min   compressor capacity