Abstract: A process and device for controlled feeding of incoherent solid materials for differentiated pressure systems along a pipeline through the pressure of a fluid in the gaseous state. The pipeline is obtained by combining a plurality of consecutive trunk sections. The device includes a mechanism for intermittent feeding of the incoherent solid material in the pipeline, a mechanism for feeding the gaseous fluid under pressure in a plurality of predefined feeding points of the pipeline, a first series of valve members applied to each trunk section for intercepting the pipeline under control, a second series of valve members applied to each trunk section for allowing the escape of the expanded gaseous fluid from the pipeline and centralized control for closing the first series of valve members and for the concurrent opening of the second series of valve members.

Abstract: A cyclically operating valve device is disclosed, which is particularly adapted to installations of pneumatic conveyance of incoherent solid materials, said valve device essentially comprising two paired parallel vanes mounted on a common shaft, and a third vane, also mounted on said shaft, which is angularly shifted relative to the other two vanes, so as to provide, in cooperation with the seats and ports provided on the valve body, an orderly sequence of operation according to a preselected operative pattern.

Abstract: A self-contained device for the pneumatic conveyance of incoherent solid materials by pneumatic pulse waves is disclosed, the improvement consisting in that a container for the material is provided with a feeding point for a pressurized gas, first and second valve means being also provided for alternately intercepting the flow of the material into the initial trunk of the conveyance line on the one hand, and the vent of the gaseous fluid and the flow of the solid material on the other hand. A second gas-feeding point is also provided to supply impulsive gas jets in alternate sequence with the pulses of said first-named feeding point. A dust takeup device is provided, having a reservoir placed in intermediate points of the conveying pipeline and functionally connected with valve means which act also as dust-collecting and dust-discharging means.