Minnesota Power Upgrade to MagnaDrive Magnetic
Couplings on Air Pre-Heaters
Problem: Minnesota Power was experiencing
vibration problems on their Air Pre-Heaters. In an effort
to correct this problem, Minnesota Power implemented a preventative
maintenance procedure that required all couplings to be re-greased
during every outage. Each re-greasing would tie up 3 Maintenance
Technicians for 3 days. Worse yet, the reduction in vibration
levels that was accomplished by the regreasing would only
last a couple of weeks before the vibration would return.
Solution: MagnaDrive approached Minnesota
Power with a proposal to replace the existing couplings with
MagnaDrive Magnetic Couplings.
Result: Minnesota Power’s vibration problems
on their Air Pre-Heaters have been completely eliminated.
Estimated savings based on quarterly outages and 9 mandays
per outage is:
4 outages X 9 man-days/outage X $600 /man-day = $21,600
annually!
