Specifically designed for wine, beer and fruit juices filtration, plunger or mechanical diaphragm H pumps integrate an exposed revolving shaft intended for driving a mixer. In the clarification process, a diatomaceous earth is dosed into the beverage and mixed counter current to the main flow, allowing for yeast cells and other particles to be removed without trapping molecules of aroma, flavor and tanning. This solution allows for dosing and mixing processes to be taken care simultaneously by a single device.