A swirl element is provided for an inlet valve of a brewing vessel for introducing a liquid, in particular a mash, a wort, a yeast suspension, a sparge water or the like into the brewing vessel, in particular into a mash tun, a mash vat, a combined mash/wort tun, a combined mash/wort/stripping tun, a wort tun, a combined whirlpool tun, a whirlpool, a clarifying device, an evaporating vessel or the like, comprising at least one flow-directing element by means of which an angular momentum can be imparted to the liquid flowing through the inlet valve. An evaporating device comprises a brewing vessel, also for evaporating highly volatile substances/gases, in particular highly volatile flavor substances, DMS, carbon dioxide, oxygen or the like from the aforementioned liquids. The brewing vessel comprises the swirl element and/or an inlet valve admitting the liquid. A brewing process evaporates highly volatile substances/gases from the aforementioned liquids.