真空泵是利用水环工作方式，向腔体内注入工艺水，同时在叶轮的旋转下形成-0.05―0MPa的真空压力，是整套设备的真空源泉。 Vacuum pump is uses water ring method, and injected into the body cavity of the process water, while forms the -0.05－0MPa vacuum pressure under impeller's revolving, it is the source of complete equipment.