Control element, especially a pneumatic valve

Element (1) switching means of pressure, for example, a pneumatic valve (2) or a hydraulic valve (172), with a valve body with a channel (12) and other distribution channels opening into the channel ( 12) distribution, for example, channels (15, 16) input and / or output or secondary channels (18) for the pressure medium and at least one element (11a, 11b) of movement that displaceable and is arranged in one of the channels (12, 15, 16, 18) for the separation and binding of other channels (15, 16, 18) and the channel (12) of distribution and at least an element (31) transmission which has at least one internal space (33) which is filled with a liquid, which expands when heated, for relative movement of the element (11a, 11b) of movement relative to valve body, characterized in that the at least one element (31) transmission is formed by a sleeve (32) elastically deformable circumscribing completely Elal least one internal space (33), within which the liquid expands is arranged when heated, and, if appropriate, form the element (11b) of movement, and that the at least one element (31) transmission is disposed in the channel (12) adjoining distribution with one of the other channels ( fifteen; 16; 18) opening into the channel (12) distribution, or one of the other channels (15; 16; 18).