Brewing machines and mechanical brewing apparatus for the production of beer and alcoholic beverages, namely, mixing machines and filtration machines for making beverages, in particular for beer, wine and liquid foodstuff, beverage aeration machines, beverage processing machines, pumps for the beverage industry, pump control valves, and structural parts therefor, for the brewing, beverages and foodstuffs industry, industrial mixers for making beverages; sifters and sieves as machines or machi...