Abstract: An apparatus for dosing volumes and/or weights of a free-flowing product contains a shaft formed by four fixed walls. At the lower end of the shaft is provided a rotary flap or valve, which can be closed and opened by a motor drive. Rotation takes place about an axis located in the vicinity of the rear wall of the shaft. The rotary valve can be opened to randomly selectable opening positions and fixed there.

Abstract: An emptying balance contains a product flow setting device, which contains a rotary slide valve. The angle between a rotary slide valve wall and the facing fixed wall is consequently dependent on the opening position of the rotary slide valve. A fine blocking flap is also provided which is opened by means of two pressure cylinders arranged in series, and which are individually controllable. For subsequent metering of small product quantities only one of the two pressure cylinders is operated and this only leads to a limited opening of the fine blocking flap.