OFQFD39x2x3 Purifier is specially used in some processes of lower output in modern flourmills where lean manufacturing princi-ples are applied. It is the ideal and economical solution for handlingdecreasing individual which requires less air exhausted. The correct selection of FQFD39x2*3 or FQFD49x2x3 in the different processes could promote the social and economic benefits of the flour milling.