Discussion on the mechanical seal flushing scheme P55
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Dear sea friends: Regarding the sealing and flushing scheme for P55 in the API, the pressure of 0.28 MPa is used to prevent air from filling the sealing chamber. What is the purpose behind this setting? Why is a pressure of 0.28 MPa chosen? What types of media are suitable for such seals?
That’s how the standards are set; there are so many details specified in 682 – do you need to study each value carefully?
Sealed chamber pressure = 1/3 head * specific gravity of medium / 100 + inlet pressure. Please check it, that’s right.
You make a good point; I just want to deepen my understanding. Under what operating conditions is this solution applicable?
Do you have any experience in engineering in this area? Could you share it? Thank you
I’m not sure if it’s related to the assumed maximum main torch pressure; the same rule applies to 52 as well