1. n. [Production Facilities]

A vessel that separates the well fluids into gas and total liquid. A two-phase separator can be horizontal, vertical or spherical. The liquid (oil, emulsion) leaves the vessel at the bottom through a level-control or dump valve. The gas leaves the vessel at the top, passing through a mist extractor to remove the small liquid droplets in the gas.

See: horizontal separator,  mist extractor,  spherical separator,  stage separation,  vertical separator