head loss

head loss (countable and uncountable, plural head losses)

1. The pressure lost in a hydraulic system as fluid moves through a pipeline.
   • 1995, Barbara Hauser, Practical Hydraulics Handbook, Second Edition, →ISBN, page 71:

     Determination of minor head loss is simple and straightforward, and a standared nomograph in common use is included at the end of the chapter.

   • 2000, Frank R. Spellman, The Science of Water, →ISBN, page 74:

     The total head loss is the sum of the head losses of all of the component pipes.

   • 2001, American Water Works Association, Butterfly Valves - Torque, Head Loss, and Cavitation, →ISBN, page 55:

     A butterfly valve, like any restriction in a pipeline, is a source of head loss.

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