Etanorm

Visual inspection of seal housing and shaft for drip traces or moisture; pressure testing with manometer to detect pressure drops; soap solution for bubble formation and leak location; control of scavenge system for blockages (overheating causes premature wear). Monitor leak rate: mechanical seal normal <0.006 l/h

Measure bearing temperature and compare with manufacturer specifications; check vibration and smooth running of pump and motor; check lubricant supply and exchange intervals; inspect elastic transmission elements (coupling bolts, discs, packages) for wear; control coupling alignment. Coupling replacement recommended in case of wear

Visual-mechanical inspection for wear of sealing rings and impeller wear protection; check for wear of shaft keyways and bearing seats; clearance inspection (<1 µm normal value for seals); check wear ring material (hard-chromed or nitrided for abrasive media >800-1000 HV surface hardness). Replace damaged or worn parts with genuine spare parts

Compare NPSH value of system (NPSHA) against required pump NPSH (NPSHR) from data sheet; NPSHA must be >= NPSHR over entire operating range; monitor pump smooth running and operating noise (cavitation noise = rough operating noise); perform pressure test bench tests to simulate cavitation conditions; check suction conditions and system design; visually inspect housing and impeller for pitting and surface erosion

Inspect piping and fittings for wear, corrosion and functionality; test pump control and switching function; check electronic monitoring systems; inspect general housing corrosion and bearing contamination traces; perform surface cleaning (DO NOT flush, instead apply protective grease); document all inspection results