needle valve


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needle valve

n.
A valve having a slender point fitting into a conical seat, used to regulate accurately the flow of a liquid or gas.

needle valve

n
(Mechanical Engineering) a valve containing a tapered rod that can be moved in or out to control the flow of a fluid

nee′dle valve`


n.
a valve with a needlelike part, a fine adjustment, or a small opening.
[1900–05]
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References in periodicals archive ?
One type has a needle valve that lies in the direction of flow and is mechanically opened and closed with either a hydraulic or pneumatic drive cylinder.
The hydraulic drive model is recommended for pressure-compensating, closed-center systems; load-sensing closed-center systems; and open-center systems up to 16 gpm using internal needle valve bypass.
The fine threads of the needle valve permit excellent adjustment for precise control of flow.
Series NV needle valve is designed to regulate pressures up to 500 psig with a flow coefficient of 0.
Ronningen-Petter's pressure instrument protector, known by its trade name IsoRing[R], is now available with or without the needle valve option.
Fine metering valves are a type of needle valve, with a long, fine stem that lowers through a long, narrow channel.
The company also showcased the TS5440 Microshot Needle Valve which is said to the excellent for dispensing low to medium viscosity materials 1-100K cps in very small deposits down to 0.
In the hot runner segment, HASCO will highlight various new needle valve solutions as well as innovative solutions for difficult gating positions in manifold tools.
The company boasts the most unique needle valve on the market today, which solves the two typical leakage problems that occur with alternative needle valves; leaking across the seat and leakage from the spindle seal.
Hasco's new Universal needle valve Z10710 can be used with all Hasco Techni Shot and Value Shot nozzles, offering a wide range of nozzle types and sizes and runner lengths up to 300 mm.
The miniature cartridge needle valve can be used to control mini-cylinders, nozzles, timing circuits and more.