Your Gardner Denver air compressor system pulls ambient air into the air end where the two rotors quickly spin to compress the air. These rotors are constantly lubricated to ensure they continue to spin as designed. This process produces a combination of compressed air and oil mist which is then sent to the separator and sump tank where the oil mist is removed by your air oil separator leaving you with the pure air you desire. A scavenge line then transfers this separated oil back to the air end where it is injected onto the rotors to repeat the process. Air Compressors Services 2117912 replacement separator replacement is guaranteed to meet or exceeds the Gardner Denver Specifications. Each separator filter replacement comes with the necessary gaskets which include grounding staples to prevent static static-electric fires. We are so confident in our 4000 hour separators that we offer and industry leading 1 year warranty against all manufacturers’ defects.