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:

    “I would build my house of crystal,
    With a solitary friend,
    Where the cold cracks like a pistol
    And the needle stands on end.”
    —Robert Frost (1874–1963)