To all,
First let me say "thank you" for all your input and questions.
The final determination for the damage to the balance disks was the fact that the two HP discharge check valves and the level control valves to the HP drum were leaking. The plant cycles off each night and was attempting...
JJPellin,
We have had these pumps completely disassembled on several occasions and I have not seen any evidence of suction recirculation cavitation, cavitation on the impellers, pump casing, or pump nozzles. I am not brave enough to say that some flashing is not occurring, it is just not...
JJPellin,
Thank you for your response.
These pumps utilize a "lift-off" assembly for initial start and do not have a true thrust bearing. The "lift-off" assembly, (two back to back roller bearings) has no indication of damage or wear.
These pumps have an oil bath "slinger ring" lubrication...
I am new to the forum and looking for some tips.
Application is on a 3x1 combined cycle project. Deltak HRSG's with GE 7 FA combustion turbines, D11 steam turbine.
HRSG's have duct burner.
GE 7 FA's have steam power augmentation used on a regular basis.
Have had 7 disc failures on KSB HGC-5 8...
