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Commercial Coffee Espresso Machines

Since the invention of Commercial coffee espresso machines in 1901, there have been several designs created and manufactured to produce espresso. Many Commercial coffee espresso machines have similar characteristics.

The difference in the fineness of the grind of coffee, the pressure to tamp the grinds and the very pressure varies the taste and quality of the espresso. Some baristas directly pull espresso shots into shot glasses or demitasse cups that are preheated to ensure a higher temperature of the espresso is maintained.

Hot beverages such as the cappuccino and latte benefit with a steam wand that some espresso machines have for steaming and frothing the milk.

There are several types of Commercial coffee espresso machines in the market today.

Steam-driven

Piston-driven

Pump-driven

Automatic

A steam-driven machine uses steam pressure or steam forcing water through the coffee grinds. In the first espresso machines steam was produced from a common boiler piped to four group heads to simultaneously make multiple types of coffee. Since there are no moving parts, this design is still used in low cost consumer machines. Low cost units which are steam driven come with a drip-coffee machine as a combination unit.

In 1945 Achille Gaggia in Italy invented the lever driven machine also known as the piston and later founded the espresso machine Gaggia using in his design a lever that can be used to pump and pressurize the hot water sending it through the coffee grounds. The term "pulling a shot" is the colloquial expression when the lever in the lever-styled espresso machine is pulled to draw a shot.

The piston driven machines come in two types. One is manual while the other is tensioned with a spring pressured to about eight to ten bars.

However, there is also a pump-driven machine that is popularly used in commercial outlets where the motorized pump supplies the pressure that's needed to brew the espresso.

Espresso machines which are designed to have additional sensors, valves, pumps and grinders to make the brewing process automatic is known as an automatic machine. These machines automatically grind, tamp and extract the coffee leaving the user the task of filling the coffee hopper and the water reservoir if it is not having a connection to a waterline. Some of the models come with inbuilt automatic milk frothing device and dispenser.