If leakage exceeds 5 drops per minute, what is the expected outcome after a 30-minute run time?

• A. Leak will stop
• B. Leak will worsen
• C. Leak rate will drop to zero immediately
• D. Seal must be replaced

Answer: (A)

During a run-in period, seals and packing materials often seat under pressure. Initially you may see some leakage as the surfaces contact and the packing compresses, but as time passes, the clearance tightens and the leak rate tends to decrease. If leakage is already above the acceptable limit at the start, a properly functioning seal should settle during the 30-minute run and the leakage should stop by the end of that period. This is why the expected outcome is that the leak will stop after 30 minutes: the sealing surface has had time to seat and form a proper seal under sustained pressure.

If leakage were to continue or worsen, that would indicate a fault requiring attention or replacement, which is why the other possibilities—leak stopping immediately, dropping to zero instantly, or mandating a seal replacement right away—don’t align with the typical run-in behavior of a properly seating seal within the allotted time.