Glossary G

Galvanic series

  • A list of metals with those on the top of the list being attacked by those lower down in the list. The father apart on the list, the faster the attack.


  • Used between two static surfaces to provide a seal. Made from a variety of deformable materials.


  • The part that holds one half of the mechanical seal and attaches to the stuffing box.

Grease seal

  • A spring loaded elastomer seal commonly used to seal bearings. Sometimes called a “lip seal”. Not a good choice for sealing the bearing casing of a pump. A labyrinth or face seal would be a better choice.