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Standard repair procedure for vertical pumps


Pump Preparation


1-               Dis-assemble the pump completely.

2-               Sand Blast Bowls.

3-               Sand Blast packing Box.

4-               Sand Blast Impellers.

5-               Sand Blast Discharge Head.

6-               Clean all other parts.

7-               Inspect all the parts completely.

8-               Polish and straightened all shafts.

9-               Polish and straightened Threaded Couplings.

10-          Prepare report of As-Is finding.




11-          Weld repair cavitations and erosion on impeller vanes.

12-          Profile impeller vanes smooth.

13-          Weld repair impeller bore.

14-          Coat Impeller with Belzona coating or equal if needed.

15-          Machine impeller bore to OEM design.

16-          Dynamic balance impeller to 4 W/N.


Suction Bell


17-          Weld eroded registration fit.

18-          Machine registration fit for design clearance.

19-          Supply and install new bearings.




20-          Machine female registration fit for design clearance to suction male fit.

21-          Weld male registration fit to column pipe and machine to design clearance.

22-          Supply and install bronze bearings, and rubber bearings.


Column/ Discharge Head


23-          Machine eroded registration fit for inter-bowl and stuffing box to establish design clearance.

24-          Weld Registration fit. Machine registration fit to design clearance to discharge head.


New Parts


25-          Supply new pump-shaft in 416 SS material.

26-          Supply new line-shaft in 416 SS material.

27-          Supply new Spiders.

28-          Supply new Spider Bearings.

29-          Supply new Bowl Bearings.

30-          Supply new Packing Box Bearing.

31-          Supply new packings.

32-          Supply new copper lines and fittings.

33-          Supply new fasteners, fittings, Oil Seal & O-Rings.


Pump Assembly & start-up


34-          Assemble pump completely.

35-          Paint pump.

36-          Provide as build report.