API Separator

API Separator

API Separator. The Refinery Wastewater Work Horse

The API oil-water separator has been for long time the workhorse and the best equipment choice for primary treatment of wastewater in Oil Refineries.

The treatment of effluents in an oil refinery is allways a challenge for the combined removal of oil and solids and to date there is no more reliable technology, from an operational point of view, than the API separator.

The API separator is an old known for separation of oily waters and was developed by Rex Link Belt in 1993, today (Envirex-Evoqua).

Wide selection of New Materials Hi-Tech

Progress in technology for this equipment has occurred in materials, which have evolved from metals to plastics to improve chemical resistance, abrasion and bacterial attack and produce a lighter equipment. In Sumio Water Systems, we have accumulated 20 years experience with the latest advances in materials technology for high temperatures and aggressive effluents.

API Separator Components

API separators are composed of a group of components, which should be studied and selected with materials of construction according to the specific needs of your project.

  • Jet Diffusers
  • Paddles (dual – function) Skimmers and Scrappers
  • Chains
  • Sprockets
  • Shafts
  • Reducer drives and motors
  • Scum pipe
  • Oil roll skimmer
  • Covers
  • Relief valves and rupture discs
  • Vents and flame arrestors


Componentes de un Separador API

Components of an API Separator

In SWS we design and manufacture your API separator adapted to the particular needs of your project. In the case of small flows steel tank it is usually the preferred choice for its transportability. We can produce fully pre-assembled units with minimum commissioning and startup time. When flows are relatively large concrete tanks is the usual choice. In SWS we have a team of specialists to assist you in the installation and assembly of the equipment.


The API separator can also be used as oily water separator in other applications, such as:

  • Crude storage tanks bottoms (oily waters)
  • Run off water from tank yards of oil facilities
  • Ballast water from crude oil ships
  • Oily waters from electrical substations

See also:
Dimensionamiento de un Separador API