a device for feeding flowable material , such as plastic granulate to a production machine , e . g . an injection molding machine , the device having a pneumatic granulate conveying line terminating at a feed barrel above the production machine and a bypass line leading through the storage receptacle , thereby automatically diverting the air flow to the bypass line , when the feed barrel is full . heating of the conveying air makes it possible to dry and preheat the granulate inside the storage receptacle .