API oil–water separator
（重定向自API Separator）
![A typical gravimetric API separator](/Images/godic/202412/21/API_Separator0016.png")
![A typical parallel plate separator](/Images/godic/202412/21/Parallel_Plate_Separator0016.png")
An API oil–water separator is a device designed to separate gross amounts of oil and suspended solids from the wastewater effluents of oil refineries, petrochemical plants, chemical plants, natural gas processing plants and other industrial sources. The name is derived from the fact that such separators are designed according to standards published by the American Petroleum Institute (API).