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.
A special feature of this system is a needle valve which is used to add a small quota of ethylene to the methane flow.
Series NV needle valve is designed to regulate pressures up to 500 psig with a flow coefficient of 0.
Invitation to tender: Supply And Installation Of A Needle Valve Dn 400 And Dn 600 Butterfly Closures On Vs Pudarica
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.
CeraCon states in contrast to all tools that are injecting thermoplastic elastomers as second component, 'S-FIT tools inject the PUR material through a cold-runner needle valve nozzle so that it directly adheres to the part.
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 flow regulators' (mounted on the cylinder air ports) lock nuts had backed off and the needle valve slowly retracted, allowing unrestricted airflow to the cylinder.
Pittsburgh, PA-based Kerotest Manufacturing has completed its acquisition of the Marsh needle valve product line from the Marsh Bellofram Corporation.
The orifice of the number one needle valve is four times as large as the orifice of the number-eight valve.
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.