Liquid-liquid coalescers
Reduce size of new vessels; increase capacity of existing drums

Liquid-liquid coalescing

Benefits of liquid-liquid coalescers

  • Reduce the size of new liquid-liquid separator vessels
  • Improve product purity
  • Reduce downstream corrosion
  • Reduce loss of valuable products such catalyst, amine and glycol
  • Increase capacity of existing drums



  • Removing haze from distillates
  • Product separation after product washing to remove water, salts, and caustic
  • Refinery alkylation processes in main settler and effluent treating system
  • Glycol and amine towers
  • Wastewater treatment


When gravity forces alone do not produce an efficient separation of immiscible fluids, adding a KOCH-OTTO YORK® liquid-liquid coalescer system can improve separation efficiency. High separation efficiency can result in only a few parts per million (ppm) liquid dispersion in the liquid effluent stream.
Created using combinations of KOCH-OTTO YORK knitted mesh and co-knit mesh, structured packing, and parallel plates, the exact combination of products in each coalescer system varies depending on your application.
When existing separator drums have no internals or very crude internals that result in inefficient liquid-liquid separation, KOCH-OTTO YORK coalescer products can be designed and manufactured to easily retrofit existing vessels, often without welding to the vessel shell. New applications are designed to handle multiple liquid and gas phases.

Coalescer systems can be offered as the complete package including the vessel, liquid distributors, coalescing media, the mist eliminator, and vortex breakers.
Materials of construction
All 300 and 400 series SS
Alloys 200, 400, 600, 800
Alloy 20
And more . . . 
Specially designed materials can be used for specific applications. For example, Alloy 66 is used for DEMISTER® mist eliminators to extend service life in sulfuric acid plants.


Additional information