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needle valve

noun, Machinery.
a valve with a needlelike part, a fine adjustment, or a small opening, especially a valve in which the opening is controlled by a needlelike or conical point that fits into a conical seat.
Origin of needle valve
First recorded in 1900-05 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for needle valve
Historical Examples
  • The first was sure that there was dirt on the point of the needle valve, in the carburetor.

    Free Air Sinclair Lewis
  • Here is situated a needle valve from which the air is allowed to escape.

  • Do you think we'll get on the right track if we put the needle valve in?

    Tom Swift and his Airship Victor Appleton
  • It is much more sensitive to adjustment in the float level and needle valve than the other type.

    Motors James Slough Zerbe
  • Consequently the needle valve nut should be moved but the small fraction of a turn for each adjustment.

    The Gasoline Motor

    Harold Whiting Slauson
  • When the level of gasoline in the float chamber was lowered the float would fall and the needle valve uncover the opening.

    Aviation Engines

    Victor Wilfred Pag
  • When this adjustment is secured the lock nut is screwed in place so the needle valve will keep the adjustment.

    Aviation Engines

    Victor Wilfred Pag
  • It will be noticed that a metering pin or needle valve opens the jet when the air valve opens.

    Aviation Engines

    Victor Wilfred Pag
  • The float may bind on its guide, the needle valve regulating the gasoline-inlet opening in bowl may stick to its seat.

    Aviation Engines

    Victor Wilfred Pag
  • After leaving the needle valve the gasoline flows along the pipe S, Plate 25, until it reaches the evaporating coil, N.

    Langley Memoir on Mechanical Flight, Parts I and II

    S. P. (Samuel Pierpont) Langley and Charles M. (Charles Matthews) Manly
British Dictionary definitions for needle valve

needle valve

a valve containing a tapered rod that can be moved in or out to control the flow of a fluid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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