Framo SD300 Deepwell Pump (Cat 95)
Framo Framo SD300 Deepwell Pump (Cat 95) — hydraulically driven submerged cargo/ballast pump (SD series). Submerged centrifugal cargo pump for liquid cargo transport (Cargo/Ballast/Stripping), IMO Annex II compliant with self-priming stripping system. Discharge capacity (series): SD125: 200 m³/h; SD200: 500 m³/h; SD100/SD150/SD250/SD300/SD350: not verifiable. Stainless steel, cofferdam leak monitoring, mechanical seal. Series-verified.
Inspector Detail
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Common issues
- Bottom (cargo-lubricated) bearing wear from dry-running or abrasive cargo residue
- Hydraulic motor internal leakage reducing pump speed and output
- Column pipe or shaft misalignment causing vibration and accelerated bearing wear
- Deck seal/stuffing box leakage allowing cargo or hydraulic oil ingress
- Underperforming stripping (self-priming) system leaving excessive cargo residue
- Hydraulic oil contamination (water or cargo ingress) degrading the HPU
- Impeller wear or erosion on abrasive or corrosive cargoes
Inspection checklist
- Check hydraulic oil condition (moisture content, particle count) at the HPU
- Inspect the deck seal/stuffing box for leakage
- Verify bottom bearing clearance/condition when the pump is pulled at dry-docking
- Check the pump column for straightness and vibration while running
- Verify stripping system vacuum/eductor performance against baseline
- Measure hydraulic motor case-drain leakage to check for internal wear
- Check hydraulic circuit non-return and pressure relief valves
- Confirm gas-freeing of the pump column per cargo history before any hot work
Service intervals
| Bottom bearing inspection/renewal | typically at dry-docking or on a running-hour trigger from Framo - varies with cargo type, not a fixed universal figure |
| Hydraulic oil sampling/analysis | every 3-6 months in service |
| Hydraulic oil filter change | per differential pressure indicator, typically every few hundred running hours - confirm against the HPU manual |
| Deck seal inspection | annually or at dry-docking |
| Full pump pull and overhaul | condition-based, commonly every 2.5-5 years depending on cargo service |
Typical wear limits
| Bottom bearing radial clearance | typically renewed once clearance reaches roughly 1.5-2x the as-new fitted clearance for this pump size - confirm against Framo's pump-specific limit |
| Hydraulic motor case-drain leakage | an increase of more than about 20-30% over the motor's as-commissioned baseline typically indicates internal wear needing attention |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Critical spares
- Bottom bearing (rubber or composite, cargo-lubricated)
- Deck seal / stuffing box seal set
- Hydraulic motor seal kit
- O-ring and gasket set for column joints
- Hydraulic oil filter elements
- Impeller wear ring (if fitted)
Safety
- Enclosed-space and gas-freeing hazards when entering the tank around a pulled pump column
- Stored hydraulic pressure - isolate and depressurise the HPU before opening components
- A seal failure can contaminate cargo with hydraulic oil or vice versa - check compatibility before running
- Hot work restrictions near cargo pump columns due to residual vapour
Class survey
Cargo pumps on tankers fall under class's cargo system survey requirements: expect checks on IMO Annex II stripping performance where applicable, pump room gas detection, and hydraulic power pack safety devices (relief valves, low-level alarms).
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Flush cofferdam regularly (before/after each loading, every 2 weeks), monitor leakage rate; elevated leakage (>10 ml/h) requires immediate inspection and seal replacement
Test delivery rate; poor stripping performance = worn wear rings; check oil volume flow in parallel operation
Cofferdam openings must be free; blocked points = pump not usable until remedied; check purge air/nitrogen
Monitor hydraulic oil temperature at return filter-cooler; set temperature alarm (>60°C typ.); check cooler performance and water flow
Regular cleaning of stainless steel components; check zinc anodes (in ballast models) for wear; examine surface discoloration/pitting
Type-general inspection and maintenance points for this equipment category — not model-specific.
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