The concept of the vacuum pump ( 2)

in the process of how to use vacuum pump chemical production well, you need to clear the following concepts:, the concept of 'vacuum' : 'vacuum' refers to a than a atmospheric pressure gas state, namely the density of gas molecule space at atmospheric pressure is greater than the gas molecule density lower area of the given space. State-owned gas is called absolute vacuum without any space. , vacuum pump: it is used to produce, improve and maintain the vacuum equipment. , exhaust air suction pressure per unit time of gas flow vacuum pump work. Unit: kg/h or cubic meters/hour; Extreme pressure ( Vacuum) : in the zero extraction and vacuum pump can achieve absolute pressure. Unit: barings, army, mega PASCAL, or mm hg ( Ceiling must reduce the local atmospheric pressure limit vacuum) ; , the pressure of work, Vacuum) : when the injection pump exhaust value of absolute pressure. Unit: barings, army, mega PASCAL, or mm hg ( They work to reduce the local atmospheric pressure for vacuum pressure) ; Work, steam pressure, steam jet vacuum pump steam pressure of work. Unit: MPa or KGF/cm; , working steam consumption of steam jet vacuum pump steam consumption per unit time. Unit: kg/h; Circulating water temperature, cooling water temperature, water injection pump or the steam jet vacuum condenser circulating water temperature. Unit: ℃; , cooling water unit of time in the inland waters or steam jet pump jet condenser circulating water flow. Unit: kg/h;