Mechanical seal chamber pressure
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I have a question: Why is there a significant difference in the pressure within the mechanical seal chambers of multiple centrifugal pumps connected in parallel? To ensure the service life of the mechanical seals, should control be focused on the flow rate of the sealing fluid or on the pressure? Furthermore, will a pressure in the mechanical seal chamber that is higher than the designed value (e.g., 0.3 MPa designed vs. 0.6 MPa actual) directly affect the service life of the mechanical seal?
It is recommended to include a simple diagram of the equipment as well, which will facilitate discussion and serve as a reference.
My understanding is: the pipe resistances are different, which is why the pressures differ. While flow rate needs to be controlled, pressure is also very important. The damage to seals caused by pressure is mainly related to the structure of mechanical seals.