Kfilter in Line filters protect your equipment from dust, dirt, oil and water. Dust will wear down your equipment and it can make pneumatic control valves get stuck. Especially when the dirt and dust is combined with oil (which is often the case with compressors). Kfilter in Line air filters have a lower pressure-drop then low-quality ones. This will save you energy. Every pressure drop in your system (from filters, dryers, long piping etc.) will require you to put your compressor on a higher set point, which will cost you extra electricity. Over time, dust will accumulate in your filters. All this dust will cause an extra obstacle for the compressed air. This means the pressure drop over your filter will become higher over time.