The Blow-Through feeders has been used for many years in flour handling systems and non-abrasive material conveying systems in large bakeries, flour-mills etc. Being an integral part of the pipe line, Blow-Through Feeder allows the material into a pressure pneumatic conveying system in a very simple and positive way. Feeders in this services has limited range of application involving products which are relatively non-abrasive such as flour, finely ground coating clays, koalins etc.