Pressure medium device of a vehicle, in which device a pressure medium flows, with a multi-layer structure which comprises at least two mutually contacting layers (20, 36), wherein, of at least two flow apertures (44, 54, 56, 58) respectively of a flow duct for the pressure medium, the two flow apertures (44, 54, 56, 58) open onto a first surface of a first layer of the mutually contacting layers (20, 36) or a first flow aperture opens onto the first surface and a second flow aperture opens onto a second surface of a second layer of the mutually contacting layers (20, 36) opposite the first surface, which is adjacent to the first layer, wherein at least one groove-like receptacle (48, 48a, 48b, 48c), projecting from the first surface and/or from the second surface, is provided for at least one separating portion (42a, 42b, 42c) of a moulded seal (40a, 40b, 40c) arranged between the two layers (20, 36), and the groove-like receptacle (48, 48a, 48b, 48c), as viewed in a plane parallel to the layers (20, 36), is arranged between a first chamber (74a; 74c) into which the first flow aperture (44; 56) opens and a second chamber (74b; 74d) into which the second flow aperture (54; 58) opens, wherein the first chamber (74a; 74c) and the second chamber (74b; 74d) are delimited at least by the first surface and by the second surface, wherein a) the groove-like receptacle (48, 48a, 48b, 48c) has at least one opening (50a, 50c) for a flow connection between the first chamber (74a; 74c) and the second chamber (74b; 74d) in a plane parallel to the layers (20, 36), characterised in that b) a group of moulded seals (40a, 40b, 40c) is provided for fitting between the two layers (20, 36), such that a first moulded seal of the group of moulded seals (40a, 40b, 40c) has, in the area of the opening (50a; 50c), a separating portion (42a; 42c) held in the groove-like receptacle (48a, 48c) for separating the first chamber (74a; 74c) from the second chamber (74b; 74d) and a second moulded seal (40b, 40c) from the group of moulded seals (40a, 40b, 40c) is formed, at least in the area of the opening (50a; 50c), without such a separating portion (42a; 42c), wherein c) depending on the particular moulded seal (40a, 40b or 40c) selected from the group of moulded seals (40a, 40b, 40c) and fitted between the two layers (20, 36), a flow connection will or will not exist between the first chamber (74a; 74c) and the second chamber (74b; 74d). a) the groove-like receptacle (48, 48a, 48b, 48c) has at least one opening (50a, 50c) for a flow connection between the first chamber (74a; 74c) and the second chamber (74b; 74d) in a plane parallel to the layers (20, 36), characterised in that b) a group of moulded seals (40a, 40b, 40c) is provided for fitting between the two layers (20, 36), such that a first moulded seal of the group of moulded seals (40a, 40b, 40c) has, in the area of the opening (50a; 50c), a separating portion (42a; 42c) held in the groove-like receptacle (48a, 48c) for separating the first chamber (74a; 74c) from the second chamber (74b; 74d) and a second moulded seal (40b, 40c) from the group of moulded seals (40a, 40b, 40c) is formed, at least in the area of the opening (50a; 50c), without such a separating portion (42a; 42c), wherein c) depending on the particular moulded seal (40a, 40b or 40c) selected from the group of moulded seals (40a, 40b, 40c) and fitted between the two layers (20, 36), a flow connection will or will not exist between the first chamber (74a; 74c) and the second chamber (74b; 74d).