Goulds Pumps 3393 - IOM User Manual
Page 77

Maintenance
• Irregularities in the casing-gasket seat surface
• Wear ring and balance drum clearances that exceed the values in the running clearances
table
NOTICE:
When clearances between the rings become excessive (increase by 100%), hydraulic
performance decreases substantially.
Casing areas to inspect
The arrows point to the areas to inspect for wear on the casing:
Casing Parts
When to Replace
Cutwaters on casings, inlet and outlet vanes on
• When grooved deeper than 1/16 in. (1.6 mm),
diffusers
or
• When worn evenly more than 1/32 in. (0.8 mm)
Vane edges
When you see cracks, pitting, or corrosion damage
Wear ring surfaces
When the clearance to the casing wear ring has
increased by 100% over the values in the running
clearances table
Model 3393 Installation, Operation, and Maintenance Manual
75
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