These models of burners represent the most powerful aluminium version of the KR series.

Thanks to their independent electric motor for the activation of the oil pump, they can burn gas and heavy oil separately.

In fact, during gas firing, the oil pump motor does not operate and remains off.
These burners are, therefore, provided with an UV photocell to control the flame during the operation.
They are, therefore, provided with a pre-heating tank equipped with low thermal load electrical resistance to ensure oil fluidity.

All burners with progressive or modulating operation, have been built to burn fuels whose standard viscosity is 400 cSt at 50°C (50 E° at 50°C).