Purpose of the static pressure test for dry gas seals
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What is the purpose of the static pressure test for dry gas seals?
Could you share how you did it?
It’s a static test, right? The data from the static test is recorded, then a dynamic test is conducted, followed by another static pressure test; the data from the static tests before and after are compared. If they are consistent, it indicates that the dry gas seal inspection has passed.
As required by the manufacturer, a dry gas seal was installed, the compressor cylinder was pressurized to the specified value, and the parameters were monitored; I am also still learning in this process.
Comparison of static data before and after. I went to attend an inspection once before; I was a bit confused at that time. At present, it’s about conducting a verification – using a certain method to obtain data that demonstrates its sealing performance, as a basis for acceptance. But its operating time is short; I’m not sure what happens when it runs for a long time.
My theoretical knowledge is limited\ud83d\ude13
Static tests mainly involve checking the interlocks of relevant quick-shut valves, the operator valve and its opening degree (which is important), as well as the activation of the auxiliary oil pump when oil pressure is low. Judging from this situation, for the dry gas seal static test, isolation gas as well as the first and second stage seal gases should be supplied, and the relevant conditions need to be checked. Do you use nitrogen at startup for level 1 sealing, and what is the flow rate? Is there any flow of the primary leak gas, and what is the approximate flow rate?
The primary sealing gas is medium-pressure nitrogen. The flow rate during the static test was unclear; I learned about it indirectly.