A mechanical seal is a device which helps join mechanisms or systems together using pressure. This type of seal can be used in plumbing systems to prevent leakage in the tubes and pipes. A mechanical seal can also be used for manufacturing and other high pressure applications.

Mechanical seals offer the required reconciliation and sealing between a compressor housing or stationary pump, and a spring shaft. They generally contain a key area such a bushing or ring that is mounted, and has a stationary seal brought about by a spinning shaft or an o-ring. Another portion is affixed to the stationary housing which also carries an o-ring seal.