一, failure forms: pump motor overload

二, the cause analysis:

A, working condition of pump head is greater than the need to lift, operation point to the big flow deviation

B, when choosing motor without thinking of slurry density

C, packing pressure is too tight

三, elimination method:

A, turn down out of the water valve, cutting impeller or reduce the speed

B, matching motor again

C, adjust the packing gland nut