The Operation Of Vacuum Coffee Makers

The unit consists of two pots that sit on top of each other. Typically these pots are made of glass. There is a tube that connects the two pots. The lower pot is filled with water. The water should be spring water or be filtered, since good tasting water is required to produce good tasting coffee.

Next, the ground coffee is added to the top pot. Pre-ground coffee can be used, or whole bean coffee can be ground freshly to use in the unit. Then the top pot is set on top of the lower pot.

Now the heat source is applied. Some units have a built in electric heat source resembling a hot plate. Other units can be placed on a stovetop. Some very elegant units use a small oil or alcohol lamp to provide the required heat.

As the water in the lower pot heats, the building pressure forces it into the top pot. When the hot water mixes with the coffee grounds, the brewing process begins. When most of the water has made its way into the top pot, the heat source is shut off or the unit removed from the stove.

Now the vacuum portion of the process starts. As the lower pot cools, the pressure in it lowers so that a vacuum forms in it in relation to the top pot. So the coffee is forced from the top pot into the lower pot.

There is typically a stainless steel metal mesh that filters the coffee as it travels back into the lower pot so that grounds cannot pass through. If the coffee is too finely ground, however, it can plug up this filter, so a coarse grind may work better.

Then the user pours off the coffee from the lower pot into his or her mug or other container. Now the user is free to enjoy the coffee, after having been anticipating it from the start of the brewing process.

By: porcupine73

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In conclusion, many people enjoy using vacuum coffee makers since it engages the user in the brewing process. People often say the vacuum process removes some of the bitterness from the coffee. Often the best coffee in the world is used, since it combined with the vacuum process produces a very delicious final product.