Magma exchangers are universal devices for giving proper temperatures for fruit and vegetable pulps. Heaters construction is based on pipe exchangers of heat connected in series. The advantage of that construction is flow of raw material without clogging of device. Such solution enables equal distribution of pressure inside of set for all particular exchangers. The devices can be combined in sets with optional efficiency. All applied tri-pipe exchangers enable large space of exchange by little external dimensions. Special construction of supplying collectors causes full unification of processed raw material. Our exchangers are raw material “foreign matter” insensitive.