Etabloc 50-32-160

Visual inspection of impeller vane surface for erosion patterns, pitting, or corrosion. Measure radial and axial clearances against DN-specific tolerances documented in KSB technical data. Check replaceable wear rings for wear grooves.

Inspect mechanical seal faces (EN 12756 standard) for contamination, crystal formation, or scoring. Verify cooling water jacket function if present. Check shaft sleeve integrity. Monitor for fresh water leakage or seawater salt deposits indicating seal breach.

Monitor bearing temperature (must remain <80°C for standard grease-lubricated deep-groove ball bearings per EN 733). Inspect bearing seats for corrosion, fretting, or axial play. Verify bearing cage condition and v-ring contamination seals remain intact.

Conduct material verification on impeller (gunmetal/bronze EN standard), pump casing, and shaft (chrome-nickel steel requirement for seawater per DNV GL approval). Inspect for white deposits (zinc corrosion products) or color change. Measure casing wall thickness at critical sections against original specifications.

Inspect suction port and sea chest connection for scale, sediment, or marine growth fouling. Check inlet pressure (must remain above 1.3 m³/s saturation vapor pressure). Examine impeller inlet eye for pitting, erosion patterns characteristic of cavitation. Verify NPSHa meets pump NPSHR across operational range.