COELESCING ELEMENT – Keltec coalescing filters are the simple way to avoid oil contamination in your all american air compressor. Keltec filters provide the highest level of clean, compressed air with a minimum loss of energy or pressure drop. Through the selection of the appropriate grade of borosilicate microglass filtration media, and maintaining the quantity, diameter and direction of individual fibers, Keltec coalescing filters guarantees your air compressor system will operate correctly with minimal operational upkeep.