Definitions

from The Century Dictionary.

  • noun A valve closed by a tapering plug at right angles to the flow of the liquid.

Etymologies

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Examples

  • Two methods were proposed to remedy this inconvenience, which amounts to a perfect use - lessness of more than i - of our power. 1st, to place a large plug-valve E, Fig. 9, in the rising pipe close to the pump, having as much water-way through its seat at a very small rise, as the whole pipe.

    Transactions of the American Philosophical Society 1771

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