What is the vacuum level of the vacuum pump?

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The pumping volume is a factor that measures the pumping speed of a vacuum pump. Generally, units are expressed in L/S and m3/h. It is an easy concept to understand – it is a parameter used to compensate for air leakage. Theoretically, when pumping air out of a container of the same volume, why can a vacuum pump with a high pumping capacity easily achieve the desired vacuum level, while one with a low pumping capacity does so slowly or even fails to reach that level? It is impossible for pipes or containers to be completely airtight, and a vacuum pump with a high pumping capacity compensates for the drop in vacuum level caused by air leakage, allowing it to easily reach the desired vacuum level. Vacuum degree indicates the degree of thinness of the gas in a vacuum state, and is usually expressed as a pressure value. The vacuum degree value indicates the extent to which the actual pressure within a system is lower than atmospheric pressure. The value shown on the gauge is referred to as gauge pressure; in the industry, it is also called absolute relative pressure. In practical applications, vacuum degrees are usually expressed either as absolute vacuum or relative vacuum. The value read from the vacuum gauge is called the degree of vacuum. Vacuum level = Atmospheric pressure – Absolute pressure (the atmospheric pressure is typically taken as 101325 Pa, while the maximum absolute pressure that a water ring vacuum pump can handle is 3300 Pa) ； The ultimate absolute pressure of vane vacuum pumps is around 10 Pa. A vacuum, in theory, refers to a volume that contains no substances at all. (There is no true vacuum in reality.) Generally, any condition in which the air pressure inside a container is lower than the normal atmospheric pressure (101325 Pa) is referred to as a vacuum state. Absolute vacuum and relative vacuum: Limiting relative pressure. The relative pressure refers to by how much the measured internal pressure is lower than \"atmospheric pressure\". It indicates that the actual system pressure is lower than the atmospheric pressure. Since the air inside the container is removed, the pressure inside remains lower than the pressure outside the container. When expressed in terms of relative pressure or gauge pressure, a negative sign must be placed in front of the value to indicate that the pressure inside the container is lower than the external pressure. The ultimate absolute pressure is the amount by which the measured internal pressure is higher than the \"theoretical vacuum\" (the pressure of theoretical vacuum being 0 Pa). The object it compares against is the absolute vacuum pressure value of the theoretical state. Due to technical limitations, it is impossible for us to reduce the internal pressure to an absolute vacuum level of 0 Pa; the vacuum level achieved by the vacuum pump is higher than the theoretical vacuum level. So when expressed in absolute vacuum, there is no negative sign in front of the value.