There are several ways of drying filler, varying from the old-fashioned method of drying by natural means up to forced drying in drums using high contact temperatures. With PMB's BD 300 the solution is lying in between the two. The temperature is neither too high, thus avoiding influencing the taste of the tobacco, nor is it too low otherwise the dimensions of the machine would become unacceptable.

The rotating drum covered with sieve-gauze prevents the tobacco from touching any heated parts of the machine. With warm air blowing through the drum the machine creates up to 300 kg fully dried tobacco per hour.