What are the reasons for a drop in DP of a spent catalyst slide valve in a FCCU?
Manan Joshi, L&T-Chiyoda, email@example.com
In most cases there is lot more erosion in this valves. If you are trying to control the solid flow through this valves as due to erosion the flow coefficient has changed you are closing more then required. This may cause higher pressure drop. Am not sure but can you share the vendor's name and valve size, I can give more details.