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Glossary of Pump Terms: 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.

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