Multicyclonic installations contain up to 15 steps of division (multicyclones). Improvement of work quality at the reduction of quantity of steps of division can be reached by increasing an starch yield from the step with the reduction of an exit of a liquid phase. To achieve that, a connection of three multicyclones according to the cross scheme is used as for a step of division instead of a separate multicyclone. It is shown that at the three multicyclones a step of division of change in redistribution of suspension components is created the design solution of the division step where liquid products are going out with only to liquid ones, and condensed products – only with condensed ones. At this step the starch yield increases in the condensed product while reducing the end product volume; therefore is received in one step the higher quality starch because of its increased quantity in the condensed descent product step. However, at such connection of multicyclones starch gets to a liquid descent of each step, therefore it is condensed additionally to release starch by con-necting of four multicyclones in to one step of division. New multistage multicyclonic installation consists of 12 multicyclones instead of 15 ones. That reduces capital and operational costs. Thus, varying manipulating the scheme of microcyclones connection in the unit, it is possible to receive the required technological result with the improved economic indicators. AllRussian Research Institute of starch products has developed lines of potato processing for dry starch on the basis 10 and 50 t / per day of initial raw materials using hydrocyclone installations. That allows to organize a new production without big capital expenditures. The hydrocyclone design with the changed external way of supply of suspension is developed at which the flow enters the already rotating product to exclude the influence of an inflow on the quality of suspension fractionation.