Viscosity Regulator

On a ship the viscosity regulator, also known as the viscosity controller in maritime terms, plays a crucial role in ensuring that the fuel oil temperature is right so that the correct viscosity for combustion and atomization can take place.

If the temperature of the fuel is increased, its viscosity will be reduced and vice versa. The viscosity controller uses a pre-warming bypass to heat the fuel before the engine is started and consists of a valve that regulates the pressure supply to the engine-driven pumps.