The issue of specific pressure at the mechanical seal face
Thread Content
A centrifugal pump is installed, and its mechanical seal leaks when the pressure applied to the pump exceeds 30 kilograms, but it does not leak when the pressure is below 30 kilograms. Is this a problem with the end face specific pressure?
What does \"pump pressurization\" mean? Perform a pressure test? Is it the pump outlet pressure? Mechanical seals are primarily related to the pump inlet pressure, with the design pressure being slightly higher than that pressure. If it is a pump pressure test, it is possible to exceed the designed pressure of the seal. According to API682 standards, the design pressure for seals generally should not exceed 40 kilograms; 30 kilograms is already a quite high pressure in this case.
A series-mounted seal cannot withstand such high pressure; without backpressure, high pressure will definitely cause leakage
By suppression, I mean the outlet pressure value of the pump
Disassemble and inspect the mechanical seal to determine where the leakage is occurring – whether it’s at the sealing surface or the sealing ring. Check whether the sealing surface is severely worn, and whether the sealing ring has aged
I’m also very curious to know whether the specific pressure of the mechanical seal’s cross-section is related to the pump outlet pressure If it matters, the outlet pressure of the pump should be strictly controlled during normal operation
You haven’t read the question carefully yet; it states that there is no leakage for weights below 30 kilograms
Where exactly is the leak occurring? ? ? Excess pressure in the sealed chamber causes the static seal ring of the mechanical seal to deform excessively, resulting in leakage!