Needle Valve

A needle valve is a type of valve having a small port and a threaded, needle-shaped plunger. It allows precise regulation of flow, although it is generally only capable of relatively low flow rates.

Read more about Needle Valve:  Construction and Operation, Uses

Famous quotes containing the word needle:

    “Think how stood the white pine tree on the shore of the Chesuncook, its branches soughing with the four winds, and every individual needle trembling in the sunlight,—think how it stands with it now,—sold, perchance, to the New England Friction-Match Company!”
    —Henry David Thoreau (1817–1862)