Abstract: A homogenizing apparatus comprises a casing having an internal cylindrical surface defining a bore having an open end. A portion of the surface is threaded and the casing defines an inlet portion terminating in an annular chamber along the threaded portion substantially centered between the ends thereof. A rotatable closing plug in the open bore end has a cylindrical threaded portion meshing with the threaded portion of the internal cylindrical surface and longitudinally extending grooves along the cylindrical threaded portion of the plug. The threads of the threaded portions and the grooves define homogenizing passages and the annular chamber surrounds the threaded portion of the plug and communicates with the homogenizing passages whereby a liquid or pasty product delivered under pressure into the inlet port is divided into two equal streams flowing from the centered annular chamber through the homogenizing passages in opposite directions. An outlet conduit receives the streams of homogenized product.