Valve for a fluid circuit, of the type of an exhaust gas recirculation circuit of an internal combustion engine, comprising a body consisting of at least a first casing to which a first fluid circulation path is connected, a second casing to which a second fluid circulation path and a third fluid circulation path are connected and in which a sealingly mounted control member is rotated about an axis to occupy different positions in order to control the circulation of fluid between the first fluid circulation path and the second and third fluid circulation paths (V2, V3), the first circulation path being permanently open to the circulation of fluid, the control member being a disk comprising at least: - a first portion which, associated with a first operating mode of the valve, is designed to constantly open the circulation of fluid through the second circulation path and to regulate, simultaneously, the circulation of fluid through the third circulation path, and - a second portion which, associated with a second operating mode of the valve, is designed to constantly shut off the circulation of fluid through the second circulation path and to regulate, simultaneously, the circulation of fluid through the third circulation path, characterized in that the first path of the valve connects radially to an edge of the first casing, the so-called lower casing, i.e. orthogonally to the axis of rotation, the second fluid circulation path and the third fluid circulation path connect radially to the edge of the second casing, the so-called upper casing, i.e. orthogonally to the axis of rotation, and in that the disk comprises a wall which extends horizontally in a plane (L, T) and a cylindrical edge which, starting from the radial outer periphery of the wall, extends vertically downwards, the cylindrical edge of the disk has an outer surface so that sealing is ensured by close-fitting lateral contact between an inner surface of the second casing and the outer surface of the control member. - a first portion which, associated with a first operating mode of the valve, is designed to constantly open the circulation of fluid through the second circulation path and to regulate, simultaneously, the circulation of fluid through the third circulation path, and - a second portion which, associated with a second operating mode of the valve, is designed to constantly shut off the circulation of fluid through the second circulation path and to regulate, simultaneously, the circulation of fluid through the third circulation path, characterized in that the first path of the valve connects radially to an edge of the first casing, the so-called lower casing, i.e. orthogonally to the axis of rotation, the second fluid circulation path and the third fluid circulation path connect radially to the edge of the second casing, the so-called upper casing, i.e. orthogonally to the axis of rotation, and in that the disk comprises a wall which extends horizontally in a plane (L, T) and a cylindrical edge which, starting from the radial outer periphery of the wall, extends vertically downwards, the cylindrical edge of the disk has an outer surface so that sealing is ensured by close-fitting lateral contact between an inner surface of the second casing and the outer surface of the control member.