Q: What is the recommended maintenance on a steel digester cover?

A: Typically, every 10 years, a digester should be taken out of service for inspection of the beams/shell (for the presence of corrosion inside and outside of the digester). Ovivo recommends that covers be sandblasted and repainted at least every 10 years. For the vertical guide system, periodically inspection of the cover for proper travel of guides and wear of guide pads is required, to ensure a proper operation.