1.The ratio of vacuum to atmospheric pressure expressed as a percentage.Subject: electricity (first-level subject);Steam turbine and gas turbine (secondary subject).
2.The vacuum degree is simply the degree of vacuum.It is the main parameters of vacuum equipment such as vacuum pump, micro vacuum pump, micro air pump, micro air pump and micro air pump。So what is vacuum?A gas condition in which the pressure is less than 101,325 PASCAL (or about 101KPa in a standard atmosphere) in a given space.In the vacuum state, the rarefaction degree of the gas is usually expressed by the pressure value of the gas. Obviously, the smaller the pressure value is, the thinner the gas is.
3.The vacuum degree refers to the density of the number of gas molecules in a device's space.There are two factors that determine the size of the vacuum: one is the ultimate vacuum and pumping speed that the vacuum pump itself can reach, and the other is the leakage of the whole system.
In general, water is an important factor affecting the vacuum. The most important thing to extract water is temperature. If there is not enough thermal energy, as a result of vacuum extraction, pressure drops, part of liquid water will evaporate, making the remaining water temperature drop or even turn into ice.So don't let the environment around the vacuum equipment be too cold in winter.