Alfa Laval Fuel Oil Cleaning Unit Solutions (FOCUS) are automated modular systems for purifying the liquid fuel oils used in gas turbine power plants.     The fuel cleaning process is designed to prevent the potentially harmful effects of contaminants often found in fuel oil, using a complete, pre-configured system with all sub-systems integrated effectively. The liquid fuels used in gas-turbine power plants vary substantially in their physical properties and the amounts and types of contaminants they contain. The trace metals sodium and potassium are often present, as well as water and a range of solid particles. Such contaminants cause high-temperature corrosion, the formation of ash deposits and clogging of the fuel supply system, resulting in costly operating problems and downtime that affects revenue earning in the power plant. However, with correct treatment prior to use, it is possible to employ a wide range of liquid fuels in any modern gas turbine power plant. By ensuring consistent compliance with specific fuel oil purification requirements, an Alfa Laval FOCUS (Fuel Oil Cleaning Unit Solutions) unit helps ensure extended turbine service life as well as a significant reduction in operating costs via less maintenance and downtime. A FOCUS installation contains all the equipment necessary for cleaning fuel oil effectively and at low cost in a straightforward, compact and robust modular unit that provides automatic, unattended operation, if required. Using a FOCUS unit for fuel oil cleaning makes it possible to do away with pre-filtration and problems with disposing of contaminated filter cartridges, and ensure reliable operation and exceptional separation efficiency at all times.