1. The pump head is too high, the current regulation; the outlet valve, reducing the current flow driving
2. Impeller or pipeline blocked; check whether there are obstacles.
3. Air or entrance pipeline leakage inspection; entrance pipeline has no cavitation and / or air leakage.
4. Stuffing the stuffing or seal wear, air leakage into the self-priming pump shell; check filler or seal and according to need to replace. Check if the lubrication is normal.
5. Pumping hot or volatile liquid inhalation of low flow; increase the suction head, to consult manufacturers.
6. Self-priming pump shell gasket damage; check the gasket and replace the requirements.
7. Valve entrance pipe or the immersion depth is not enough; the right to consult manufacturers immersion depth, eliminate swirl baffle.
