1bar to 1.5bar By querying the configuration information of Black Hawk coffee machine, the steam pressure of Black Hawk coffee machine is 1bar to 1.5bar, which belongs to low-pressure steam, and the steam temperature is 120℃ to 140℃. The Black Hawk coffee machine heats a certain amount of water into steam, and uses the liquid in the closed space to generate pressure on the volume expansion of gas, so that the high-temperature steam can extract coffee through the coffee powder bowl.