There are numerous varieties of espresso machines currently available in the market. From the old candle driven types to the more contemporary dual thermostat regulated, multi-chamber models. In this regard, espresso machine reviews attempt to elaborate on each of these products. However, all of these machines can be subdivided into two main categories, which are the steam or pump varieties.
Steam-driven Espresso Machines
These machines carry out their work by the use of pressure. Typically, they heat up water in a tightly sealed chamber until it is converted into steam. This steam is then rapidly forced through the coffee grounds, and ultimately poured into either a carafe or cup when it is ready.
Stove pot Steam Espresso Machines
These are the simplest kinds of espresso machines that you can get. They come with a built-in water reservoir which sits on the stove, while the coffee is positioned on top of it, separated above and below by a screen. When the water boils up, the steam that is produced enters the bottom screen into the coffee grounds and escapes out through the top screen. From here, it moves through a diminutive pipe into the machine’s upper chamber, where its temperature is maintained.
Pump Driven Espresso Machines
These products are highly noted for their incapability of boiling water into steam like the first varieties. Quite rather, the water is pumped to the coffee grounds at a relatively cool temperature. When this process is completed appropriately, these machines are capable of producing a higher quality espresso shot when contrasted with the stream driven models.
Electric Pump Espresso Machines
These products are, without a doubt, the most popular espresso machine models that are currently available in the market. They allow the user to calibrate precisely the exact temperature they wish to work with before the water is pushed through the coffee grounds. The pump’s power is usually gauged in bars, and the bottom end of such an espresso machine can be temperature calibrated at the factory for added convenience.
Manual Pump Espresso Machines
These espresso machine reviews would certainly be incomplete without touching on the manual pump models. These espresso machines do not possess an electric pump mechanism and do not depend on steam as well. Water is boiled up to the ideal temperature separately, and then the user has to squeeze it through the coffee grounds manually via a large handle (mostly metallic). Hence, the famous phrase pulling a shot’ as the use of manual pump espresso machines requires you to pull a shot in the literal sense of the term.