The most mysterious thing about brewing coffee is the roasted beans.
The most mysterious thing about brewing coffee is that the roasted beans not only contain fragrant flavor, but also contain other substances that taste bad. At the beginning of this century, the Italians found the correct conclusion:
By pressurizing the water, the two kinds of substances can be separated more effectively.
The oil is emulsified and extracted under pressure to form a reddish-brown foam-like crema. The delicious substances contained in crema are refreshing. So what is the best pressure? It is generally believed that the pressure of cooking espresso should be between 8.2 and 9 atmospheres. I set it at 8.2 atmospheric pressure myself.
Stabilize the pump pressure-
The water pressure in our shop is very unstable, high in the morning and low in the afternoon. Sometimes there will be sudden changes, and even the dishwasher at the back will affect the espresso at the front bar when it comes to water.
Once the inlet pressure changes, so does the rotary pump of espresso. In order to solve this problem, we have installed a 3-gallon stainless steel storage tank in front of the inlet of the espresso machine, and equipped with automatic water intake device (including float switch, solenoid valve, adapter), the pressure of the inlet can be maintained at 1 atmospheric pressure.
Potential trouble-
These newly added pipeline fittings should be careful not to seep air. The pump inlet cannot be pumped empty without water. Otherwise, the espresso machine pump, which was originally used to pump water, will draw air and cannot move, and the pressure will not come up.
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Requirements for commercial espresso machines espresso machines
Chapter 5 who do commercial espresso machines buy machines from?-in my business workshops, there are always a lot of people asking: which espresso machine is the best? I often say perfunctorily: a machine that can move is best. It sounds rotten at first, but after you have heard my sincere and in-depth analysis, you will know that being able to move is a prerequisite.
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The temperature of the brewed water and the conditions for a good cup of coffee
The temperature of the brewed water-the element of good coffee-the quality of the water temperature control absolutely affects whether a cup of coffee can preserve the delicious substances in the beans. The better your coffee is made, the more intractable the ultimate problem of water temperature becomes. The water temperature seriously affects the quality of coffee, but it is difficult to control. The temperature of the water is not good, because the temperature of the boiling water in the espresso machine is high.
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