In a valve housing 11, which is constituted by an section of an extruded billet material, into which are formed inlet and outlet conduits 27, 28, 29, 30, which are substantially arranged in a common plane, and a receiving bore 20 for at least one valve element 21, 26, arranged transversely in relation thereto, the billet material is formed as a profiled element provided with ribs 15, 16, 17, 18 which project from a substantially parallelepiped base body and in which ribs the inlet and outlet conduits 27, 28, 29, 30 open.