Goulds Pumps 3393 - IOM - 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