The mass flow feeder is a controllable high-capacity gravity feeder for relatively coarse granular materials. It consists of a mass flow hopper with two movable sides. The discharge rate is controlled by synchronous rotation of the movable sides. The flow rate is a function of the discharge opening width and the slope of the blades. Minimum flow rate is limited by the opening width at which the material arches across the opening. Turndown rates of 10 to 1 can normally be expected. At a specific setting, the unit discharges consistently with little variation. The rate varies with different materials and their flow properties.
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