Pumping pump down what is the phenomenon

Pumping the pump down the phenomenon: (1) pump idle and vibration sound; (2) pump outlet pressure gauge pointer down and fluctuations. (3) the current drops rapidly; (4) the pump vibrates; (5) the pipeline vibrates violently and has a great "ding" sound. OF: natural Yixing special Pump Co., mainly produced filter for pumps, the suction-type slurry pump, high wear-resistant crystallized glass pump, zinc smelting ultrahigh molecular weight polyethylene wear and corrosion characteristics of a stirring blade, etc. Pump products

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