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Standard repair procedure for split case pumps

Pump Preparation

1- Remove upper casing.

2- Remove rotating element.

3- Dis-assemble rotating element completely.

4- Sand Blast Upper and Lower Casing.

5- Sand Blast Impeller, and Bearing Housings.

6- Clean all other parts.

7- Inspect Upper and Lower Casing for cracks and wear.

8- Inspect Impeller for cracks and wear.

9- Inspect shaft for straightness.

10- Inspect Bearing Housings for cracks and wear.

11- Inspect the parts completely.

12- Polish and straightened shaft.

13- Prepare report of As-Is finding.

Impeller

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

15- Weld repair cavitations and erosion on impeller vanes.

16- Profile impeller vanes smooth.

17- Weld repair impeller bore.

18- Machine impeller bore to OEM design.

19- Dynamic balance impeller to 4 W/N.

New Parts

20- Replace pump-shaft with new 416 SS material, if needed.

21- Replace the Impeller Wear Rings with new of the same materials.

22- Replace the Case Rings with new of the same materials.

23- Replace the Shaft Sleeves with new of the same materials.

24- Rebuild Bearing Isolator.

25- Replace Upper and Lower Bearings with new bearings.

26- Replace all C/R Seals.

27- Replace Casing Gasket.

28- Replace Bearing Housing Gaskets.

29- Replace the Mechanical Seals with new.

30- Supply new fasteners, fittings, & O-Rings.

Pump Assembly & start-up

31- Install Impeller on Shaft.

32- Balance Impeller and Shaft to 4W/N.

33- Assemble rotating element completely.

34- Assemble pump completely.

35- Paint upper, lower casing, & Bearing Housings.

36- Provide as build report