Glossary 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 preferred seal faces.


  • United States Customary System. All dimensions are in inch units.


  • On February 09, 2018