A large energy producer (electricity + heats) faced frequent failures on their water recirculation centrifugal pumps. NSK jointly with the local distributor performed a bearing failure investigation on site. The result showed that the lubrication of the pump bearings as the source of repeated failures. NSK proposed to change the bearing type over to a sealed for life greased bearing featuring DDU seals and high temperature grease. This gave significant improvement in performance reducing maintenance costs.
Before | Cost p.a. | NSK Solution | Cost p.a. | |
---|---|---|---|---|
Cost of bearings used before | € 1,550 | DGBB bearings with DDU seals | € 480 | |
Oil replenishment costs | € 1,700 | Oil replenishment costs | € 0 | |
Maintenance costs | € 7,200 | Maintenance costs | € 0 | |
Downtime costs | € 19,000 | No downtime costs | € 0 | |
Total Costs | € 29 450 | € 480 |
Reference:SS-E-5012