A. Yes. SIEBENSTER is a cast-iron roaster: the front and rear plates of the drum, which must retain heat, and the main body frame are all made of cast iron. As a result, the machine is extremely sturdy, and its large mass gives it excellent heat retention.

A. The SIEBENSTER drum combines cast iron and stainless steel. Because a drum cannot be made from cast iron alone, the drum of no roaster is made entirely of cast iron.

In a SIEBENSTER drum, the front and rear rim structures are cast iron, and the drum surface is a double-layer stainless steel structure, using SUS 310S on the inside and SUS304 on the outside.

A. Polidoro is the name of an Italian burner manufacturer. The Polidoro burner used in SIEBENSTER roasters is the burner that Probat used in the past: a type of impingement-flame burner in a piano-key layout that is easy to expand and offers high thermal efficiency. 

A. Probat no longer uses Polidoro burners. The reason is RE100, that is, Europe’s low-carbon energy policy. Probat now uses nozzle-less premix burners, and every kind of premix burner is weak at low-flame control. In Korea, where roasting at a wide variety of batch sizes is frequent, the Polidoro, with its wide heating-power range, is better suited. 

A. By design, SIEBENSTER roasters are divided into the SP model and the SUG model, which correspond to Probat’s P-type and UG-type models.

The SP model is available in 1, 3, 6, 12, 25, 30, 60, 120 and 240 kg versions, and

the SUG model is available in 6, 12, 25 and 30 kg versions. 

Some customers ask for an 8 kg or 15 kg model, but the 6 kg and 12 kg models cover those capacities to a reasonable degree. In other words, the 6 kg model can roast 8 kg, and the 12 kg model can roast 15 kg, thanks to its generous heating power and drum size.