A power company in North Carolina was having problems with their ID fan dampers between the electrostatic precipitator and the stack. The high temperature for the flue gas (approximately 300° F) coming out of the precipitator was baking the grease in the bearing.
This gas contained some fly ash that was causing clutch failures in the damper actuation system and required emergency maintenance to avoid shut down of the boiler. GRAPHALLOY® 845 inserts were installed to replace the ball bearings.
The dampers have run trouble free for more than two years.
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