This table shows the criteria for replacing the impeller:
Impeller parts
When to replace
Impeller vanes
•
When grooved deeper than 1.6 mm | 1/16 in., or
•
When worn evenly more than 0.8 mm | 1/32 in.
Pumpout vanes
When worn or bent more than 0.8 mm | 1/32 in.
Vane edges
When you see cracks, pitting, or corrosion damage
Wear ring surfaces When the clearance to the casing wear ring has increased by 50% over the values in the Mini-
mum running clearances table
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.
6.5 Preassembly inspections
3620 i-FRAME API type BB2 single stage / ISO 13709 2nd Ed/API 11th Ed Installation, Operation, and Maintenance
Manual
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Содержание GOULDS PUMPS i-FRAME 3620
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