Differences between double-end face and series sealing
Thread Content
As I understand it, double-end surfaces mean two sets of friction pairs, in other words, two sets of end surfaces. Including series and back-to-back. In series configuration, the pressure in the second sealing chamber is lower than that in the first chamber; for example, 11+72+75, 11+52. In back-to-back configuration, the pressure in the second chamber is higher than that in the first chamber; for example, 74/53A. Is this the correct way to understand it?
What about 11+53? The pressure in the second sealing chamber is higher than that in the first
53 is back-to-back, right? It’s not serial sealing, is it?
Back-to-back is only 53, and there are also series connections under pressure, such as 11+53
API682, contents regarding the sealing flushing scheme