Alfa Laval ALP 200
Alfa Laval Alfa Laval ALP 200 — Pumps, 30 kW.
Inspector Detail
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Common issues
- Mechanical seal leakage after dry-running or extended idle periods
- Cavitation noise/vibration from low suction pressure or a blocked strainer
- Bearing wear from misalignment or lubrication neglect
- Reduced capacity from impeller/wear ring erosion in seawater service
- Motor overheating from prolonged operation against a closed valve
- Corrosion of wetted parts in seawater duty
Inspection checklist
- Check mechanical seal for leakage or weeping
- Measure vibration and bearing temperature under load
- Check coupling alignment
- Inspect and clean the suction strainer
- Check wear ring clearance at overhaul
- Verify discharge pressure/flow against the commissioning baseline
- Check anodes if fitted for seawater service
- Confirm standby pump auto-start function if part of an automated cooling system
Service intervals
| Bearing lubrication | per the manufacturer's interval, typically annually |
| Mechanical seal inspection | annually or on leakage |
| Strainer cleaning | weekly to monthly depending on water quality |
| Wear ring/clearance check | at overhaul, typically every 4-6 years |
| Coupling alignment check | annually or after disturbance |
Typical wear limits
| Impeller/wear ring clearance | typically increases several-fold from new-build clearance before capacity loss becomes significant for this pump class - confirm the specific figures in the ALP-series manual rather than a generic value |
| Bearing vibration trend | assess against the vessel's own baseline reading; a sustained rise is more meaningful than any single absolute figure |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Critical spares
- Mechanical seal kit
- Impeller
- Wear rings
- Bearing set
- Shaft sleeve
- Anodes, if fitted
Safety
- Isolate and depressurise before opening the casing or seal housing
- Secure electrical isolation (LOTO) before any driver work
- Guard couplings before running with covers removed
- Do not run dead-headed against a closed discharge for extended periods
Class survey
If serving an essential cooling system, class will expect this pump (and any standby unit) to be on the PMS with completed maintenance history, and to demonstrate correct auto-start/changeover if configured as a standby pump.
Components & Design
Component data being added…
Technical Data
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