A major refinery was experiencing frequent bearing failures in their vertical oily wastewater sump pumps. The bronze packing box and line shaft bearings were wearing out within two months of service, damaging the shaft and causing leakage through the packing at the stuffing box. Upgrading to GRAPHALLOY bushings solved the problem.The bearing failure was also causing an environmental issue when the hydrocarbon/water slime leaked into the ground.
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