FAQs

FAQ

FREQUENTLY ASKED QUESTIONS

1. Replacement/Interchangeable parts inquiry:

●  OEM part number

●  Material code

2. Replacement/Interchangeable pump inquiry:

●  OEM pump model

●  OEM pump assembly drawing

3. Complete Pump inquiry:

● Equipment TAG
● Pump Description
● Pump Type
● Qty
● Solid density    (t/m3)
● *Slurry density    (t/m3)
● *Design Capacity
● (m3/h )
● *Total Dynamic Head
● Slurry (m)
● D50 um
● Cw %
● PH

4. Expectations for a trial pump

● The detail operating condition or data sheet of the existing pump
● The wet parts part number
● The performance curve of the existing pump
● Current lifetime of the existing pump
● The photos of the worn parts

5. OEM/ODM parts inquiry:

● OEM part numbers
● OEM Equipment brand
● OEM Equipment Model
● Original OEM parts drawing
● Anuual quantity

6. How to adjust the impeller clearance after the slurry pump impeller is replaced?

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1. If it is a mechanical seal structure, first reset the positioning card, and then loosen the locking screw of the shaft sleeve;

2. Loosen the compression bolts of the bearing assembly;

3. Loosen the shaft end on the adjusting bolt and the two nuts at the pump head end (generally there are three nuts);

4. Turn the adjusting bolt clockwise to push the shaft group forward until the impeller and the guard plate stick to it and cannot rotate (according to the rotation direction of the pump when turning the pump);

5. Loosen the nut in the middle, and then slowly adjust the nut on the side of the pump head until the impeller can rotate normally (according to the rotation direction of the pump when turning the pump), and there is no friction with the front and rear guard plates;

6. Finally, lock all the nuts on the adjusting bolt, and the adjustment is completed.

7. Tighten the compression bolts;

8. Tighten the sleeve locking screw;

9. Finally, take out the positioning card.
(Note: 8 and 9 are operation steps for mechanical seals)

7.Common faults and solutions of slurry pumps

Some problems may occur after the slurry pump is used for a period of time. Early detection of problems and timely solutions will not only ensure the continued use of the slurry pump, but also reduce economic losses. Slurry pump manufacturers summarize the following common faults and solutions for reference.
1. The slurry pump does not absorb water
There are three reasons: 1. The suction pipe is blocked or leaking; 2. The impeller is worn; 3. The steering is wrong.
Solutions: 1. Clean up the blockage in the suction pipe or block the leak; 2. Repair or replace the impeller; 3. Check the steering.
2. Vibration and noise
Causes of failure: 1. The installation of the pump is not on the horizontal line; 2. The impeller is unbalanced; 3. The intake pipe is not uniform; 4. The feeding is not uniform
Solutions: 1. Check whether the pump body is level during installation and operation; 2. Replace the impeller; 3. Strengthen the stability of the intake air; 4. Improve the feed status.
3. The pump bearing is overheated
Causes of failure: 1. Too much or too little lubricating oil; 2. Improper assembly and improper bearing clearance; 3. Lubricating oil is contaminated with debris; 4. Bearing damage.
Solutions: 1. Add lubricating oil as required; 2. Assemble and adjust the gap as required; 3. Replace with new lubricating oil; 4. Replace with new bearings.
Four, pump bearing life is short
Causes: 1. The motor shaft and the pump shaft are asymmetrical and not parallel; 2. There is friction in the pump or the impeller is out of balance; 3. There are foreign objects in the bearing and the lubrication is not good; 4. The bearing assembly is unreasonable
Solution: 1. Adjust the motor shaft or pump shaft, if the shaft is deformed, replace it directly; 2. Eliminate friction and replace the impeller with a new one; 3. Take out the bearing and clean it; 4. Reassemble reasonably.
5. Leakage at the packing of the pump
Causes of failure: 1. The packing is seriously worn; 2. The shaft sleeve is seriously worn; 3. The sealing water is not clean
Solutions: 1. Replace with new packing; 2. Replace the shaft sleeve; 3. Replace with clean sealing water.


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