A system for creating a sterile barrier and lubricating and/or cooling moving parts in UHT food sterilization plants, which operates using cold water sterilized by filtration. The system draws well or demineralized water through at least three filters (F1, F2, F3) and then transfers said filtered and sterilized water to the moving parts sterilization of the filters and the water distribution circuit starts from at least one tank (S) with the addition of an antiseptic and antibacterial agent in proportion to the tank capacity. The filters (F1, F2, F3) have increasing filtering grades and at least the last filter (F3) is a bacteriological filter.
