Various Versions Of Espresso Machine

The very popular espresso coffee has more to it than just its taste

, and in fact be quite complicated in the production process alone just to get the right taste into that one special cup. This is why there is an espresso machine to help produce this coffee in an attempt to be consistent in the flavor for the distinguished coffee connoisseur.

The making of espresso is so sensitively delicate that the combinations of temperature, pressure and texture of the grind can really change the taste of that one cup. The espresso coffee machines are a big help in trying to maintain a consistency in regulating these three factors in order to be sure that the results will always be the same. Some espresso machines go as far as having an attachment steam wand in order to be able to produce latte or cappuccino in the process.

Some espresso machines are steam driven and the concept behind this is when the water is actually forced through the coffee filter with the use of steam pressure. Most of the very first espresso machines were steam models as piping already hot, steaming water through several pipes could serve more cups of coffee at one time. This type of design still survives as a combination drip coffee machine that is sold as a lower cost appliance.

The piston driven version of espresso machine requires the use of a hand lever that is used to send the hot water through the grinds, and an operator does the work in pumping the lever mechanism. The pressure applied by the operator creates a unique espresso brew, and this is quite popular in many high class establishments. There is a manual piston design that requires direct pressure from the operator, and also a spring piston design that helps an operator in controlling the pressure to be more consistent and maintaining the taste of the coffee.

Pump driven machines are a refined version that uses a motor to pump the necessary pressure level into the coffee for brewing espresso. Most of these types of espresso makers are found in commercial establishments wherein the commercial machines are attached directly to the water supply, and lower end home consumer versions of the machine have built in water reserves.

Another type of espresso coffee machine is the air pump driven version that uses compressed air to force hot water through. For this version, the hot water can be added from a separate source such as a kettle, and the compressed air can be released by a hand pump, pressurized cartridges, or an electric compressor. The air pump driven machines are a much smaller version than the electric compressor type, giving them the option of portability.

As the years have gone by, the modern automated versions of the espresso machine have been developed, and these are popular in many establishments as they basically take care of most of the process. Using sensors, valves, pumps, and grinders, these automated machines allow more room for the operator to attend to more customers at one time.

Commercial establishments opt for the automatic machines and utilize the three different versions of them, depending upon their needs. Semi automatic machines use the pump to deliver the hot water and three way valves to release the brew pressure. Automatic machines have an extra inflow meter attached to the valves that regulates the brewing time and the amount of water that has passed through, making more even portions.

The super automatic type of machine produces only a few cups at a time, but can provide consistently flavored espresso even though the operator is unskilled. This type of machine, as well as others, are rejected by the expert baristas, as they feel that the espresso is of inferior quality for their tastes.

by: Ken Wright

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