What do a.m. and p.m. stand for?

throttle valve

a valve for throttling the working fluid of an engine, refrigerator, etc.
Origin of throttle valve
1805-15 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for throttle valve
  • The throttle control failure caused the astern throttle valve to fully open, resulting in increased steam flow.
  • Both the needle valve and the throttle valve are used to adjust the gas pressure in the source.
  • Speed or power is then changed by signals to the throttle valve through a governor or actuator.
  • Repeated throttle valve adjustments have not been successful in stopping the valve closures.
  • For example, verifying the position of a throttle valve or other control may require observation of the positioning activity.
  • The hydrostatic test shall be applied from the boiler drum to the throttle valve.
  • The trip mechanism is usually a latch hook device on the trip-and-throttle valve.

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