CA 32/0.5
Azcue CA 32/0.5 — Self-priming centrifugal bilge pump.
Inspector Detail
▸
Common issues
- Mechanical seal leakage or wear, especially in dirty bilge service
- Impeller wear or erosion from entrained solids or cavitation
- Self-priming performance degrading as wear ring clearance opens up
- Bearing wear/noise from continuous or intermittent duty cycling
- Coupling misalignment after reinstallation
- Casing erosion/corrosion from abrasive or corrosive bilge contents
- Suction strainer clogging leading to loss of prime or cavitation
Inspection checklist
- Mechanical seal leakage check
- Bearing temperature, vibration and noise
- Coupling alignment
- Self-priming time against baseline commissioning figure
- Suction strainer condition
- Discharge pressure/flow trend against the pump curve
- Motor current draw and insulation resistance
- External casing corrosion
- Bilge line valve line-up correct to prevent uncontrolled overboard discharge
Service intervals
| Mechanical seal inspection | condition-based; typically reviewed at overhaul or annually for a lightly duty-cycled bilge pump |
| Bearing grease/oil renewal | typically every 2,000-4,000 running hours or per the maker's schedule |
| Coupling alignment check | after any pump/motor removal, and at least annually |
| Wear ring/impeller clearance check | at major overhaul, commonly every 2-4 years depending on duty |
| Suction strainer cleaning | routine, per operations |
Typical wear limits
| Wear ring radial clearance | centrifugal pumps of this size are typically renewed once radial clearance has roughly doubled from the new-and-clean value (often in the region of 0.3-0.8 mm depending on pump size) - confirm against Azcue's manual |
| Mechanical seal life | typically 8,000-16,000 running hours depending on duty; dirty/abrasive bilge service can shorten this considerably |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Critical spares
- Mechanical seal kit
- Wear rings
- Impeller
- Coupling element/spider
- Bearing set
- Gasket/O-ring set
- Shaft sleeve
Safety
- Bilge water may contain oil/hydrocarbons - incorrect valve line-up risks an illegal or accidental overboard discharge (MARPOL/OWS interface)
- Rotating shaft/coupling guard must be fitted before running
- Isolate power before mechanical seal or impeller work
- Release any trapped pressure before opening the casing
Class survey
Bilge pumps are checked under the bilge and ballast system survey: capacity tested against the vessel's required bilge pumping rate, non-return valve function in the bilge line verified, and (for an independently powered bilge pump) its independent power source confirmed.
Components & Design
Component data being added…
Technical Data
🤖 Ask about this model
One free question — answered like a marine engineer. No account needed.
Common failures & inspection points
Verify mechanical seal assembly is properly installed, check for any signs of leakage around the shaft seal, inspect seal faces for corrosion or wear
Check impeller for solids deposits, verify semi-open impeller design (where applicable) for debris tolerance, confirm strainer/suction screen functionality
Verify rigid or flexible coupling is properly tightened, check for corrosion on coupling components, confirm shaft alignment using dial indicator
Inspect cast iron casing for pitting or corrosion, verify bronze/stainless steel options match intended seawater service, check wear rings for erosion
For self-priming models (CA, SP, MO, BR), test dry-run capability after 30-minute initial priming, verify foot valve/suction screen is not blocked, confirm NPSH requirements are met
Type-general inspection and maintenance points for this equipment category — not model-specific.
Suppliers & Spare Parts
Direct links to manufacturer, datasheet, spare-parts portal and dealers — request access below.
📄 Request sourcing links & documentsCases, daily reports, timesheets and AI troubleshooting in the OceanSphere Marine app — free for 14 days.
Start free trial →Find manufacturers, repair shops and spare-part dealers in the Maritime Network — our global company directory.
Maritime Network →