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Pump vibration and noise causes of the malfunction: First, the floor bottom corner of the installation is not smooth Elimination method: correction of the platen stability Second, the Department of compression screws loose Exclusion method: adjust the uniform compression of the ministries bolts Third, the pipeline and the pump import and export serious deviation , To withstand large resistance Elimination method: adjust the connection between the pipe and the pump outlet Vertical support frame (the pump can not withstand the pipeline pressure) Fourth, the pump and the motor coaxiality deviation and no gap between the coupling End Elimination Method: Adjust the pump And the motor to adjust the axial clearance between the end face of the provisions of the value of about 3mm Fifth, the pump shaft and bearing damage Remedy: Replace the pump shaft or bearing Sixth, the pump debris removal method: Remove debris pump Seven, Flow rate is not stable Remedy: Remove the tube of air bubbles and air pipes are not smooth, bend more Eight, the buffer ring damage Remedy: Replace the buffer ring