The air/oil separator is key part to relate to the compressed air quality.
  High quality separator has long lifespan.

  The compressed air from compressor air end carries oil drops. Big ones
  are  separated as soon as they pass through oil tank, but the small ones
  with less than  1μm diameter is suspended oil particles, which  have
  to be separated by air/oil separator. Normally the air and oil mixture
  passes  the separator and the coalescing effect is carried out  through
  a multi stage separation process resulting in recovery of the oil and
  producing clean air.





  Particles in compressed air intercepted by the media and detained on the
  media result the increase of pressure drop. The separator needs to be
  replaced  when the pressure drop is reached at 0.08-0.1Mpa, otherwise
  the compressor will  work at higher power cost.