The milking pressure and extraction pressure of Italian coffee machine are not the same parameter.

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High-pressure steam coffee machine is a kind of Italian coffee machine.

Italian coffee machine is divided into steam Italian and pump Italian, steam Italian refers to the so-called high-pressure steam, but the pressure is only 3-5BAR (1BAR=1 atmosphere), can only make coffee a little stronger than the American drip coffee machine, but can not make coffee containing crema oil, similar to a mocha pot.

Pump pressure Italian coffee machine, there is pump pressure, the common is 15BAR pump pressure, this kind of machine can make coffee containing crema oil, is the real espresso coffee.

1: how much Bar does it take to make a good cup of Espresso coffee maker?

A: the standard of the Italian Coffee Association-9bar.

2: in the absence of information, how do you know the real pressure of the coffee machine?

A: most business machines are indicated by pressure gauges.

3: many professional coffee machines have more pressure than 10Bar, but under normal circumstances, only 9Bar is enough. Since you don't need such a high pressure, what's the use of the extra?

Answer: even if it can reach 100bar, it is meaningless, because if it is completely blocked, how much pressure can not come out; the rotary vane pump can provide 9bar pressure when the machine is started, needless to say, anyway, the pressure is 9, the coarse powder makes coffee quickly, the fine powder does not make coffee, or it comes out slowly. in short, both of these are bad to taste, the correct thing is that under the 9bar pressure, 15Mel 30ml can be concentrated in 30 seconds. The above for commercial machines; household machine electromagnetic pump, the pressure is gradually rising, by 0-set safety pressure value, the higher the safety pressure value, the better the performance of the pump-relatively speaking!

If it is not a double boiler (that is, a hot water boiler and a steam boiler are separated), the boiler pressure is the steam pressure. 0.7-0.8bar is also enough, less milk can, more will not work. A normal pressure of 1.0 is better.