we have the same Model and doing online ofcause. nearly the same frequency ofr every brushes, but some are even faster. we have replaced old model brushes that are with plastic roller by new design, since they easily hang up when over heated. still the new design give some problems, specially over heating of prussure springs that leads less performance and dis engage the brush from operation/ hang up.

atleast once in every month we open the comparment cover for online maintenance, operation routine check it visually every day each shift, since its so critical and recently we have a bad experience of flash over in another plant of us. changing brushes online is practical and require more experience to feel comfortable. during shutdown a good maintenance is possible.

razeen
KSA