Mechanical seal flushing
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I have a question for everyone: why must the pressure of the external flushing water be higher than the pressure inside the pump chamber?
Is the liquid film formed between the friction pairs of the mechanical seal made from an internal medium or an external flushing fluid? External flushing is generally used when the medium conditions are quite complex, right?
In the case of external flushing, if the pressure of the flushing fluid is not higher than that in the sealed chamber, how can the circulating fluid reach the sealing surface?
Hasn’t your title already set that limit? Only the case of high pressure was considered! Post another one and I’ll upvote it
I think that if the pressure of the circulating fluid is too high, it can push the end faces out of alignment, preventing the friction pairs from fitting tightly together and thus causing leaks
The pressure is low; the medium has leaked into the mechanical seal
Are there specific explanations in the API standards regarding the applicable scenarios?