The present document relates to an arrangement applied to a pneumatic distribution system for solid products in farming tools and machines that is designed to enable the incorporation of solid products in pressurized ducts, using longitudinally inclined finned rotors driven in rotation. The model is characterized in that it comprises incorporating and dosing chambers (3) which connect the solid-product discharge mechanism (1) to the pneumatic conveyance mechanism (2) and are installed beneath the funnels (12) and above the distribution ducts (22), said chambers comprising a housing or support cover (31) provided with an upper solid-product inlet aperture (32) and a lower outlet aperture for quantitatively dosed solid product (33), inside which is installed a rotor (34) with longitudinally inclined fins (35) and driven in rotation externally (36), wherein the space between adjacent fins (35) forms dosage chambers (37) for solid product to be incorporated into the pressurized air flow passing through the distribution ducts (22)； the fins (35) are made of an elastomeric or similar material, with relative flexibility and self-sealing of the rotor (34) and minimum friction with the internal wall of the housing (31), with which the outer edges thereof are nearly or actually in contact.La présente invention concerne un agencement pour système de distribution pneumatique de produits solides pour machines et outils agricoles, visant à permettre l'introduction de produits solides dans des conduits sous pression, au moyen de rotors à ailettes longitudinalement inclinées à actionnement par rotation. Le modèle se caractérise en ce qu'il comprend des chambres de dosage et d'introduction (3) reliant le mécanisme de décharge de produits solides (1) au mécanisme pneumatique d'acheminement (2), installées sous les entonnoirs (12) et au-dessus des conduits de distribution (22), et constituées par un boîtier ou enveloppe de support (31) qui présente une ouverture inférieure de sortie d
