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Globe valve jammed & not operating 2
- Thread starter Isha90
- Start date
Here are some further questions you need to answer, as there maybe many reasons that it is jammed
You mention nothing about the type of actuator, the service history of the valve(new or old, well or poorly maintained, operated often or infrequently etc).
Is it jammed open or closed?
What flow rates does it handle?
What are the materials of construction?
Is Dowtherm oil vapor the process fluid?
Regards
Ashtree
"Any water can be made potable if you filter it through enough money"
You mention nothing about the type of actuator, the service history of the valve(new or old, well or poorly maintained, operated often or infrequently etc).
Is it jammed open or closed?
What flow rates does it handle?
What are the materials of construction?
Is Dowtherm oil vapor the process fluid?
Regards
Ashtree
"Any water can be made potable if you filter it through enough money"
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2
- #3
Who do you think we are, The Amazing Kreskin? At best, we can guess at the possibilities. These may be educated guesses, but you can do some forensic investigation with the valve itself and probably know what the issue is. My guess is a valve stem leak, the dowtherm vapors condensed and gummed up the valve stem, and it got stuck. My advice is seek the help of a knowledgeable instrument mechanic and go look into it with them.
Good luck,
Latexman
To a ChE, the glass is always full - 1/2 air and 1/2 water.
Good luck,
Latexman
To a ChE, the glass is always full - 1/2 air and 1/2 water.
- Thread starter
- #5
EdStainless
Materials
Ask the guys that installed them, did they ever operate?
Did anyone check these before the system was commissioned? (obviously not)
It could be anything from corrosion shipping to damage in installation.
= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube
Did anyone check these before the system was commissioned? (obviously not)
It could be anything from corrosion shipping to damage in installation.
= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube
- Thread starter
- #7
How many "Hand wheel operated 1" CL.800 Globe valves, Body materiel A105 Trim 8" were bought/installed?
How many "Hand wheel operated 1" CL.800 Globe valves, Body materiel A105 Trim 8" that were installed failed?
When was commissioning? How long ago?
Good luck,
Latexman
To a ChE, the glass is always full - 1/2 air and 1/2 water.
How many "Hand wheel operated 1" CL.800 Globe valves, Body materiel A105 Trim 8" that were installed failed?
When was commissioning? How long ago?
Good luck,
Latexman
To a ChE, the glass is always full - 1/2 air and 1/2 water.
racookpe1978
Nuclear
When did you walk out to the plant site and looked at and photographed every one of the 1 inch globe valve that has failed? Provide those photo's.
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