Coking unit feed isolation valve
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One month after resuming operation following the maintenance, it was found that there was internal leakage in the feed isolation valve, and even the manufacturer was unable to fix it!
What model of valve is it? Come and take a look
Internal leakage? It’s more noticeable when water is supplied, right?
When supplying water, a steam injection is added between the four-way valve and the feed isolation valve; this has not yet affected the production tower
It can be closed properly, but no pressure is generated between the four-way valve and this valve after it is closed