Sandy Inox
Grindex Sandy Inox — Sludge - Stainless steel large solids.
Inspector Detail
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Common issues
- Impeller wear from abrasive solids reducing flow and head
- Seal chamber oil contamination (water ingress) indicating mechanical seal wear
- Cable gland leakage allowing moisture into the motor housing
- Strainer/inlet blockage from debris exceeding the rated solids passage
- Overheating trips from dry-running or a blocked discharge
- Stator winding insulation degradation from repeated dry-running or overheating
- Float switch/level control fouling in sludge service, causing erratic start/stop
Inspection checklist
- Check seal chamber oil for water content, discoloration or metal particles
- Inspect power and control cable for cuts, abrasion or gland leakage
- Check impeller and wear plate/strainer for erosion, chips or clogging
- Megger-test motor insulation resistance
- Verify thermal protection and moisture sensor trip function
- Inspect lifting handle, chain and guide rail fittings for corrosion or wear
- Check the stainless housing for pitting or crevice corrosion
- Test any non-return valve fitted in the discharge line
- Run a dry-test and compare amperage against nameplate full-load current
Service intervals
| Seal chamber oil check/change | every 1,000-2,000 hours or annually, whichever comes first |
| Insulation resistance (megger) test | every 2,000 hours or at each planned maintenance opening |
| Impeller/wear plate inspection | annually or per the maker's schedule for the duty |
| Cable and gland inspection | every 6 months for pumps in continuous sludge duty |
Typical wear limits
| Impeller-to-wear-plate clearance | generally renewed once clearance has opened up considerably beyond the as-new setting - confirm the exact figure in the pump manual |
| Mechanical seal oil water content | seal is generally considered failing once the oil is emulsified/milky or shows a clear water content - replace the seal at that point |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Critical spares
- Mechanical seal set (pump-side and motor-side)
- Seal chamber oil, correct grade per the maker's spec
- Impeller
- Wear plate / strainer
- Power cable with gland kit
- O-ring set for housing joints
Safety
- Submersible electrical equipment in a wet/sludge environment - verify insulation and earthing before reconnecting power
- Heavy pump unit - use proper lifting gear, never lift by the power cable
- Pumped medium may contain hazardous or flammable residues - check tank atmosphere and follow enclosed-space entry procedures before manual retrieval
- Sharp impeller edges and large-solids passage - isolate power before reaching into the casing
Class survey
Bilge, sludge and oily-water pumps are generally checked as part of routine machinery and MARPOL Annex I equipment surveys where applicable; keep seal-change and insulation-test records, and confirm this unit is not relied upon as the sole means where a class-approved oily water separator pump is specifically required.
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Visual inspection of impeller surface, hard-iron coating integrity, and strainer perforations. Check for pitting in hydraulic surfaces.
Run pressure drop test across seal cavity; measure leakage rate at discharge. Inspect seal chamber for contamination ingress.
Megohm meter (insulation resistance test) across motor windings to ground at 500-1000VDC. Document baseline and trending.
Visual inspect cable jacket for cracks, UV damage, moisture ingress. Measure conductor resistance and insulation resistance annually.
Temperature monitoring of bearing housing (should not exceed 65°C). Visual inspection of oil color/clarity in accessible bearing cavities post-operation.
Type-general inspection and maintenance points for this equipment category — not model-specific.
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