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Bayoubare, Where did you get the info for the maximum hydrogen evolution rate? Thanks,

Do you perform any testing/inspections beyond the annual checks? Such as during major overhauls every 5 , 10 yrs?

Thank you very much for sharing this information.

Yes it is a moveable blade Kaplan.

I’m trying to put together a maintenance schedule for a 5-blade Kaplan turbine unit. I’ve gone through the FIST manuals (U.S. Bureau of Reclamation) and some manufacturers manuals, but was wondering what type of services other Kaplan units undergo at different facilities. I would appreciate...

Thanks for all the thoughts/inputs. I'm going to throw another assumption into the equation. If none of the pressure is recovered on the downstream side of the U (due to the vacuum relief valve), does that mean that there would be, at a maximum, an increase of 10ft of static pressure on the...

"The only difference I see will be an increase in friction head due to the extra pipe-run bought about by the inverted U, this could effect the output of the pump in terms of the flowrate at the new total head. However - you say to neglect friction - so I don't see any problem. " This was my...

I understand, and I appreciate all the responses. Here is a diagram of what is going on. http://files.engineering.com/getfile.aspx?folder=303c6f76-8b89-4935-9ebd-63b68fc03f91&file=Piping_Diagram.pdf All three heat exchangers “thrust bearing”, “lower guide”, “turbine bearing” are simply water...

There is a vacuum relief valve being installed at the top of the inverted U, which means that full pressure recovery is not possible. Does that mean that the pump will “see” an extra 10 ft of static head pressure? Even though the highest point in the system is 5 ft above the height of the U?

Here’s the piping/pump problem… I’m leaving out some details in order to simplify the problem in order to explain it. I have 3 heat exchangers that have cooling water provided from one pump. These heat exchangers are at different elevations, for simplicity say they are at elevation 10ft, 20ft...

Actually it is a sootblowing supply valve, not a blowdown valve. The inlet isn't always condensate, under normal operating conditions the inlet is 1600 psi sat steam. Like JLSeagull suggested, wire drawing may be the issue. The valve could possibly be over sized. Thanks for the input.

I've only seen the valve repaired once, and at that time the valve seat had developed a groove (it is a high pressure control globe valve). Both the seat and plug is 416 SS. I would use a split range controller to control both valves. There is approx. 16 ft of vertical 2 inch pipe down from...

I'm trying to replace/modify a series of valves that reduces pressure from 1600 psi to 400 psi. There is currently one PRV along with an isolation valve in series. Both get steam/condesate cut in a matter of months. These valves are cycled approx. twice a day. Will replacing the isolation...