NSL 150-215

Bearing temperature monitoring - check for overheating daily; establish baseline temperature and monitor for 25% increase indicating potential bearing failure

Vibration analysis - monitor overall system vibration as indicator of misalignment, bearing wear, cavitation, or obstruction; increased readings signal developing problems

Mechanical seal inspection - check for leakage and adequate lubrication; monitor for flush flow decrease or temperature rise indicating seal failure

Cavitation detection - listen for characteristic gravel-like noise; verify Net Positive Suction Head (NPSH) available exceeds NPSH required; monitor suction strainers and tank levels during vessel pitching/rolling

Impeller and casing condition - inspect for erosion, pitting, wear, or corrosion; replace if wear exceeds 1/8 inch depth; check for grooves or scoring

Coupling alignment and shaft runout - verify proper alignment; check shaft runout with tolerance of 0.002 inches; misalignment can cause seal and bearing wear

Pressure monitoring - check and compare suction and discharge pressures against baseline; log performance data for trend analysis

Lubricant condition - monitor bearing oil for water content and discoloration; ensure adequate lubricant level with no signs of bubbling or thermal degradation