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Fantastic ideas for a Fantastic World, I make the illogical logical.They put me in cars,they put me in yer tv.They put me in stereos and those little radios you stick in your ears.They even put me in watches, they have teeny gremlins for your watches
Mr. Sb also this is not a polit answer. If you dont have any information (this is what i think, cause u r electrical man not mechanical) please no need to replay the guests questions in mechnical section.
the choice of valves according to the system you have (during design stage), If you have valve selection hand book you will get all the information you need.
(types, classification, material, and where to use... etc)
You have not given us enough information with which to formulate an answer to your question.
Be that as it may, let's first talk about some of the basics of Sulfur piping.
A. Sulfur is a "slurry". It will "Set-up" (get hard) if it has no flow and no heat input such as heat tracing.
B. You indicate that "jacketed piping" is involved. So you most likely have steam or some other hot fluid in the jacket and the sulfur in the center pipe.
C. You now want a valve that does not have "pockets" in it and one that can be traced or jacketed for heat input.
C. A Plug Valve can be traced or jacketed but is not a good valve to use for Sulfur because in the closed position it "traps" the fluid and could form a blockage of the pipe line
D. A "Diaphram Valve" would be a better valve for Sulfur. It does not trap the fluid and if you get one that can take the temperature can be traced or jacketed. http://www.asahi-america.com/diaphragm-Type-14-Flanged.htm