Better drainage technology (BDT) A new generation of coalescing media improves the performance parameters of eliminating liquid droplets from a gas stream

M. Neukirch*, P. Wijns, Hollingsworth & Vose, Germany

Compressed air is one of the main cost drivers in the industry. Today there are two main types of compressors – “oil free” and oil lubricated compressors. Oil lubricated compressors, which are the main fraction of the market, need the installation of oil coalescing media in order to remove the oil droplets from the compressed air.

These high efficient filter media solutions have two main functions:

  1. Deliver a highly efficient particulate filtration effect suitable for the efficiency ranges chosen


  1. Eliminate oil droplets from the airstream or in other words a high rate of coalescence, meaning a low oil carry over (OCO).

A normal coalescer filter element is either wrapped (up to 15 layers) or pleated dependant on their field of usage or the element design of the filter element manufacturer. A usual lifetime of an air-liquid coalescer filter is between 6-12 month and mainly driven by an increased pressure drop due to blocked pores.

Currently the development of oil-air coalescer filtration media used in oil lubricated compressors is an evolutionary rather than driven by a disruptive approach.

A novel approach is a special functionalization of coalescing media by using...

Session: G1 - Mist and Droplet Separation I
Day: 13 March 2018
Time: 13:00 - 14:15 h

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