The limit of the vacuum pump pressure unit is Pa, refers to the pump at the entrance is equipped with standard test cover And work conditions by the regulation, without the introduction of gas under the condition of normal work, the minimum pressure tends to stable.
The partial pressure is the pressure of the non-condensable gas in the gas. The total pressure is the pressure of all the gases in the gas. In the vacuum application, the partial pressure and the total pressure have their application range.
In the current assessment standard of the vacuum pump, if it is not specified as the total pressure, the limit pressure indicator is the partial pressure. 10-3Torr=1.33*10-1pa syringe pump and rotary vane pump can be achieved;
At present, domestic and foreign rotary vane pumps can reach 6* 10-2pa, which refers to the pressure of the non-condensable gas in the gas. The total pressure is the pressure of all the gases in the gas. In the vacuum application, the partial pressure and the total pressure have their application range.
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