Excessive heat generation between seal faces will drastically
reduce seal life. It typically occurs when a pump is flooded and/or the seal
chamber is incorrectly vented before pump start-up that lead to excessive heat
generation and dry-running.
Shaft run-out and elevated vibration levels may also cause
interruption to the lubrication film established between mechanical seal faces
during successful operation.
A mechanical seal is often the first visible point of a
failure, but the root cause of failure may be located in a different part of
the system. Using the correct piping system, verifying sufficient net positive
suction head available, carrying out proper pump preparation and ensuring that
pump functions are within the original equipment manufacturer's parameters are all important for reliable seal performance.
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