ITT 3610 i-FRAME Manual page 87

Casing areas to inspect
The arrows point to the areas to inspect for wear on the casing:
Figure 62: Casing inspection
Impeller replacement
This table shows the criteria for replacing the impeller:
Impeller parts
Impeller vanes
Pumpout vanes
Vane edges
Wear ring surfaces When the clearance to the casing wear ring has increased by 50% over the values in the Mini-
Impeller checks
NOTICE:
Protect machined surfaces while cleaning the parts. Failure to do so may result in equipment
damage.
• Check and clean the impeller bore diameter.
• Check the impeller balance. Rebalance the impeller if it exceeds ISO 1940-1, grade G2.5.
NOTICE:
You must have extremely accurate tooling equipment to balance impellers to ISO 1940-1,
grade G2.5. Do not attempt to balance impellers to this criteria unless this type of tooling and
equipment is available.
3610 i-FRAME API 610 11th Ed/ISO 13709 2nd Ed, API Type BB1 Single-Stage, Axially-Split, Between-Bearing IOM
When to replace
• When grooved deeper than 1.6 mm | 1/16 in., or
• When worn evenly more than 0.8 mm | 1/32 in.
When worn or bent more than 0.8 mm | 1/32 in.
When you see cracks, pitting, or corrosion damage
mum running clearances table
6.5 Preassembly inspections
85