needle valve

American  

noun

Machinery.

1. 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.

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needle valve British  

noun

1. a valve containing a tapered rod that can be moved in or out to control the flow of a fluid

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Etymology

Origin of needle valve

First recorded in 1900–05

Example Sentences

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

From Project Gutenberg

The fuel from the tank entered the top of the float compartment and the opening was closed by a needle valve carried on top of a hollow metal float.

From Project Gutenberg

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

From Project Gutenberg

A balanced float mechanism which insures steadiness of feed is used, the gasoline jet or standpipe is provided with a needle valve to vary the amount of gasoline supplied the mixture and two air openings are provided.

From Project Gutenberg

One of these consists of a needle valve to regulate the amount of gasoline, the other is a knurled screw which controls the amount of air by limiting the lift of the jump valve.

From Project Gutenberg