why no copper parts in PSV
why no copper parts in PSV
(OP)
There are no parts on pressure relief valve made from copper. Why is that?
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why no copper parts in PSV
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RE: why no copper parts in PSV
I have seen lots of bronze pressure relief valves. Most bronze is >80% Cu.
Why do you ask?
RE: why no copper parts in PSV
RE: why no copper parts in PSV
RE: why no copper parts in PSV
Obviously, carol2005, the specification you were reading was dealing with either a pressure issue, or a chemical issue where brass would not suffice for the service.
Do you have any insight as to what type of service the PSV's in question were for?
I used to use PSV's on seawater service, and they were 100% bronze for obvious reasons.
rmw
RE: why no copper parts in PSV
Copper being so maleable, a SV made of it would easily distort from piping loads, vibration and the like. The body could possibly creep due to the disc closing spring forces. The corrosion patina could interfere with moving parts and jam up the works, any heat would reduce ultimate strength and further exacerbate distortion issues.
If the body distorted, alignment would be affected and the SV would most likely pass/leak. If the disc was copper too, then the metal to metal seat would probably be chewed out in no time flat as well.
Cheers
Rob
BUT, add some alloying elements to copper and you get a much hardier material aka brass / bronze etc...
RE: why no copper parts in PSV
RE: why no copper parts in PSV
RE: why no copper parts in PSV