 The equipment is a separate flow-through electrostatic treatment section installed upstream of a gravity separator to improve the performance.By keeping the treatment and settling sections separate, a compact electrostatic coalescer can be obtained that can also be retrofitted.Liquid-liquid coalecers are also widely used in oil refining industry to remove the last traces of contaminants like amine or caustic from intermediate products in oil refineries, and also for the last stage dewatering of final products like kerosene (jet fuel), LPG, gasoline and diesel to <15 ppmw free water in the hydrocarbon phase.