How Long Can a Mechanical Seal Run Dry

In general, most mechanical seals can withstand dry running conditions for only a few seconds to a minute at most. Some specialized seals, designed for temporary dry running, may last a few minutes under these conditions.

When a mechanical seal runs dry, the lack of lubrication causes increased friction between the seal faces, generating excessive heat. This heat can quickly damage the seal faces, leading to scoring, cracking, or complete failure. The high temperatures can also cause the seal materials to degrade, further compromising the seal’s integrity.