Jet Washers are installed on the tank roof in place of the supports guides: their function is to crumble the sludge and dissolve hydrocarbons.

While liquefying, hydrocarbon gets separated from sludge thanks to 3 combined actions:

1. Mechanical: given by the 5/6 bars of the oil jet from the jet washers;
2. Chemical: given by the lower specific weight;
3. Physical: by heating the oil, viscosity is reduced.