Machines and machinery installations for the manufacture, treating, processing and refining of foodstuffs and luxury foodstuffs and of beverages and fruit juices, in particular for mixing, storing and purifying machines and machinery installations for the food, brewing and drinks industries, namely, machines for brewing beverages and for automated wort and fermenting lines, for producing yeast cultures mainly consisting of tanks, pipelines, valves, pumps, namely, yeast propagation pumps machi...