Pump can't draw liquid
1. There is no liquid filling?
1. Refill the pump
2. Is the suction pipe, the outlet pipe or the flow passage of the pump blocked?
2. Eliminate debris
3. There is no exhaust gas in the suction pipe or pump?
3. Overhaul the suction pipe and drain the gas
4. The suction height exceeds the allowable range?
4. Reinstall the pump according to the allowable suction height
5. The extruded pipeline is too thin and the pipeline loss is too large?
5. Change to a suitable extrusion line
6. The use head exceeds the design head?
6. Reselect the pump
7. Transport hot, volatile media?
7. Reduce the suction stroke or use reverse filling
8. Is the steering reversed?
8. Correct the steering
Insufficient pump flow
1. The bottom valve is too small?
1. Change to a suitable bottom valve for pump
2. The suction pipe is not immersed in depth enough, and there is air sucked into the pump?
2. Increase the immersion depth of the suction pipe
3. The suction pipe is too thin or blocked by debris?
3. Replace suitable pipelines to remove debris
4. The impeller is severely worn or corroded?
4. Replace with a new impeller
5. Is the sealing ring severely worn or corroded?
5. Replace the sealing ring with a new one
6. The gap between the semi-open impeller and the pump cover is too large?
6. Reduce the gap
7. Too much speed reduction?
7. Check the current and restore the speed
Pump head is not enough
1. The impeller is corroded seriously?
1. Replace with a new impeller
2. The performance of the pump does not meet the design requirements?
2. Replace the pump that meets the design requirements
3. Insufficient speed?
3. Check the current and restore the speed
4. The gap between the semi-open impeller and the pump cover is too large?
4. Reduce the gap
Severe pump vibration
1. Is the pump and motor shaft not concentric?
1. Adjust and align the pump and motor axis
2. Is the pump shaft bent?
2. Remove the straightening or replace it with a new one
3. The impeller is unbalanced?
3. Remove to find balance
Pump bearing overheated
1. Is there no or insufficient lubricating oil (grease)?
1. Add lubricating oil (grease) to the required standard
2. Is the pump and motor shaft not concentric?
2. Adjust and align the pump and motor axis
3. The bearing is damaged?
3. Replace the bearing for the new pump
Serious mechanical seal leakage
1. Insufficient spring pressure?
1. Re-adjust the spring compression or change the spring
2. Corrosion, wear or scratches on the end face of dynamic or static ring?
2. Repair or replace the broken moving ring and static ring
3. Loose fixing screws make the spring useless?
3. Tighten the screw or readjust the spring
4. Is the movable ring sealing ring assembled obliquely rolled or corroded and deformed?
4. Reinstall or replace the moving ring sealing ring for the pump
5. The static ring assembly is skewed?
5. Reinstall the static ring for the pump
6. The machining accuracy and finish of the shaft sleeve are not enough, which affects the axial movement of the moving ring?
6. Replace the shaft sleeve with qualified machining accuracy
7. Impurities, foreign matter or medium crystals affect the axial movement of the moving ring or are supported between the end faces of the moving and static rings?
7. Eliminate impurities, foreign bodies and crystals, and thoroughly clean the sealing components
Serious leakage of packing seal
1. The packing is too loose?
1. Tighten the packing gland to an appropriate level
2. The packing device is not good?
2. Adjust the filler overlap so that it is staggered by a certain angle and not in the same direction
3. The size of the packing is different or the wear is serious?
3. Replace the uniform type of packing
4. Poor packing quality and poor sealing performance?
4. Replace asbestos filler that meets the requirements
5. Too much wear of the shaft sleeve?
5. Replace the shaft sleeve
Pump motor is overheated
1. The scope of use (flow, head) exceeds the design requirements of the pump?
1. Select the appropriate motor according to the series type spectrum
2. The specific gravity of the medium exceeds the configured motor of the pump?
2. Configure a suitable motor for pump
3. The packing gland is pressed too tightly or the mechanical seal spring is adjusted too tightly?
3. Readjust the spring compression of the gland or mechanical seal
4. The pump assembly quality is poor, there is friction or the motor is not concentric with the pump shaft?
4. Check the assembly quality and eliminate assembly faults