FAQs on Safety Valves
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A few days ago, I used several safety valves for handling chlorine gas; the material of these valves was WCB lined with PTFE. However, after not long, the valve springs broke. I hope to get some advice on this issue
What material is the spring made of? It should be related to chlorine
Those made of 304 material won’t work either; their corrosivity is too high
It is estimated that the spring material is not resistant to chlorine corrosion.
This spring doesn’t come into direct contact with chlorine, right?
How is your outlet pipeline configured – is it straight or angled upward? If it’s angled upward, chlorine gas will flow into the spring valve chamber when the safety valve discharges, causing corrosion of the spring
A bellows-type safety valve should be installed; the spring material is likely to need to be Hastelloy. Additionally, you can place a burst disc in front of the safety valve, which will help reduce the requirements regarding the material of the safety valve itself
I’ve learned it! I hope the expert will continue to provide answers!
It should be a bellows; when releasing pressure, it’s necessary to balance the spring chamber, which can cause the spring to corrode!
Media with a high chlorine content certainly cannot use stainless steel
I agree with the view from floor 7; chlorine has a very strong corrosive effect, so it’s more appropriate to install a burst disc in front of the safety valve!