Fuel oil booster module
B2. Marine EngineeringDefinition
Skid raising HFO pressure and temperature to injection conditions.
A fuel-oil booster module is a pressurized skid that raises heavy fuel oil from the service tank to the temperature, pressure, and viscosity the engine needs at the injection pumps. It holds the supply and booster (circulating) pumps, a steam or electric final heater, an automatic viscosity controller with an inline viscometer, a mixing tank or de-aeration column, and a duplex filter, circulating hot fuel in a closed loop so the engine draws only what it burns. The booster pumps keep the fuel pressurized above its boiling point so heated HFO at 130 to 150 degrees C does not flash.
Source: Engine maker fuel-oil supply system project guide