needle valve

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needle valve

[′nēd·əl ‚valv]
(mechanical engineering)
A slender, pointed rod fitting in a hole or circular or conoidal seat; used in hydraulic turbines and hydroelectric systems.

needle valve

A type of globe valve in which the throttling is performed by a tapered pin moving in and out of a conical seat to adjust the fluid flow.

needle valve

needle valve
A fluid control valve that uses a long tapered needle to finely control the amount of fluid passing through the orifice. The more the needle is in, the lesser is the amount of flow, and vice versa. It can be adjusted as required.
References in periodicals archive ?
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.
Examples include conventional and small and medium ball valves, butterfly valves, plug valves, and needle valves.
The key products within this company include an unrivalled range of instrument accessories, needle valves and manifolds suitable for high pressure and low temperature gases and liquids.
The benefits are said to include reduced flushing and maintenance requirements; simple adaptation of the mixing distance to individual needs; and eliminated mechanical parts such as material pressure reduction valves and material on/off needle valves which are not required to maintain performance accuracy due to pressure losses.
New techniques employ self-calibrating needle valves to eliminate significant back pressure on the gas supply unit, thus avoiding conditions of choked gas flow.
This UK valves market research report incorporates gate, ball, pneumatic, hydraulic, process control, globe, relief and safety, butterfly, plug, pressure reducing, check and needle valves and other valves.
Tenders are invited for Stainless Steel Transformer Oil Sample Container With 2Nos Ss Needle Valves Of 1 Ltr Capacity.
Located in Hudson, Massachusetts, the company provides a wide range of valves, including ball valves, pneumatic valves, inert isolation valves, solenoid operated valves, valve actuators, pinch valves, manifold valves, globe valves, butterfly valves, needle valves, and miniature and subminiature valves.
Material injection nozzles are controlled by needle valves for positive flow control.
SOLON, Ohio -- Swagelok(R) GU series needle valves isolate and vent system media in instrument air, nitrogen header, lube oil, and general utility service applications in the oil and gas, chemical, petrochemical, and other general industrial markets.
Valve offerings include pneumatic valves, inert isolation valves, solenoid operated valves, valve actuators, pinch valves, manifold valves, ball valves, globe valves, butterfly valves, needle valves, and miniature and subminiature valves.
New Swagelok(R) F10 series forged-body needle valves feature working pressures up to 10 000 psig (690 bar).