A mechanical seal is a device that helps join systems or mechanisms together by preventing leakage (e.g. in a pumping system), containing pressure, or excluding contamination.
Mechanical seals prevent leakage in equipment with moving parts such as mixers and pumps. It is devised to contain liquid or gas in applications where a rotating shaft goes through a stationary housing – or less commonly where the shaft is stationary, and the housing rotates around it
They are used in various applications ranging from automobiles, ships, rockets and industrial plant equipment, to residential devices
Vertical Multistage pump - mechanical seal
