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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.
1900-05 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for needle valve
  • Open high side bleed needle valve on test kit bleeding the air from the high hose.
  • Valves which use a needle valve to seal the orifice shall not be acceptable.
  • The gas was sent from the column through a needle valve where the pressure was reduced to atmospheric.
  • Protect a gauge subject to pressure surges or cyclic pulses by installing a needle valve or orifice for damping.
  • In addition, a needle valve is located downstream of the viscometer and enables control of the flow-through rate.
  • After the incident, the operators discovered that the needle valve on the subsurface safety valve was closed.
  • Collect the sample directly from the needle valve at the sample port.
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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