1. Motor overheating or exceeding current limit
1. Selection and Design Issues
Check item: The actual flow rate of the pump is greater than the designed flow rate;
Elimination measures: Reduce the flow rate of the pump (lower the rotational speed or replace with a smaller diameter impeller, based on the impeller cutting theory of slurry pumps).
Check items: The motor power provided is too low or the slurry density is too high;
Removal measure: Replace with a high-power motor.
2. Assembly, Installation and Usage Issues
Inspection item: There is mechanical friction between the impeller of the slurry pump and the guard plate;
Elimination measures: Adjust the gap and eliminate friction;
Inspection items: Bearing damage;
Removal measures: Replace the bearing;
Check item: There is friction between the packing cover at the shaft seal or the water seal ring and the shaft sleeve, or the packing is too tightly pressed;
Elimination measures: Overcome friction and adjust the tightness of the packing pressure;
Inspection items: The rotating shafts of the pump, coupling, and motor are not concentric.
Elimination measures: Adjust the coaxiality of the electric rotating shaft of the pump pair;
Inspection item: The elastic rubber pad of the coupling is damaged;
Removal measure: Replace the elastic pad.
2. The pump fails to pump water or has insufficient output.
1. System issues of the device
Check item: Air intake at the inlet flange of the suction pipe or pump.
Elimination measures: Overcome intake factors;
Check items: No shaft seal water added or air entering the shaft seal area;
Elimination measures: Add shaft sealing water to overcome the intake factor;
Inspection item: The outlet valve was not closed before startup, or the outlet valve of the slurry pump was opened too quickly during startup;
Exclusion measures: Operate in accordance with the startup procedures for the slurry pump;
Inspection item: Blockage at the suction inlet of the slurry pump;
Elimination measures: Remove the blockages;
Check items: Leakage of the vacuum tank or unreasonable size of the vacuum tank;
Solution: To overcome the intake factor or to modify the size of the vacuum tank, you can contact Shijiazhuang Rite Pump Industry by phone.
2. Issues Concerning the Selection and Calculation of Slurry Pumps
Check item: The pump's head pressure is lower than the head pressure of the pipeline system;
Elimination measures: Increase the pump's head to match the pipeline.
Check item: The vapor clearance of the pipeline is less than the required vapor clearance of the pump;
Elimination measures: Modify the pipeline equipment system to increase the pipeline cavitation margin or replace the pump with one that meets the pipeline requirements in terms of cavitation performance;
Check item: The concentration of slurry is high but the selected pump is small;
Elimination measures: Replace with a larger-diameter slurry pump
