A mechanical-pneumatic meter of solid materials for agricultural machines and implements that allows for an improved metering of the solid materials without the need of a forced suction or aspiration, covering the entire work width in a much more practical, simple and safe way, whether by metering the material either individually or combined with another type, and reducing, in turn, the negative impacts on the environment since it makes it possible to reuse those materials that have not been unloaded.

A feed wheel is provided that includes a body, a plurality of material ports formed in the body, and a plurality of outer pressure ports formed in the body. The body is operable to rotate about a central axis. The material ports are operable to receive material. The outer pressure ports are positioned radially outward in relation to the material ports. Each of the outer pressure ports is operable to receive pressurized gas when in registration with a pneumatic supply as the body rotates about the central axis. Each of the outer pressure ports are in fluid communication with a corresponding material port such that when an outer pressure port receives the pressurized gas, the pressurized gas discharges the material from the corresponding material port s out of the top surface of the body.

A rotary valve for dosing, introducing and/or discharging granules and a process plant for pulsation-free dosing, introducing and/or discharging granules, including a granulator and a rotary valve connected to a discharge of the granulator. The rotary valve includes a housing wherein an interior space is formed which is confined by a housing wall with a cylindrical inner wall surface. The housing has an introducing unit in an introducing zone that opens with an inlet opening into the interior space and, in a discharge zone spaced apart in relation to the introducing zone in the peripheral direction of the center axis, a discharge unit including an outlet opening likewise opening into the interior space. The housing wall extends over the outlet opening and, in the region of the outlet opening, includes a screen wall section designed as a screen.

A cellular wheel sluice for bulk material comprises a housing having an interior, an extraction side cover releasably fastened to the housing, a cellular wheel which is arranged in an operational position in the housing so that it can be driven in rotation about a longitudinal axis and which is held on the extraction side cover, an extraction device for displacing the cellular wheel between the operational position and an extracted position, wherein the extraction device has a guide unit for guided displacement of the cellular wheel along an extraction direction parallel to the longitudinal axis, and an extraction drive arranged fixed to the housing and coupled to the extraction side cover for automatically driven displacement of the extraction side cover with the cellular wheel.