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Glossary of Pump Terms: U
Unbalanced seal

Not hydraulically balanced to generate low heat at the seal faces. Typical of original equipment designs.

Unfilled carbon

Containing carbon/ graphite and nothing else. Filled carbons contain inorganics that will be sensitive to some chemicals and temperature extremes. Unfilled carbons are the prefereed seal faces.


United States Customary System. Al dimensions are in inch units.

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