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 ?
A unique arrangement of needle valves regulates the flow of gas.
A new needle-drive unit for hot-runner valve gates is said to overcome several limitations common to single-shot needle valves. Hasco America Inc., Arden, N.C., says these issues include splitting of the melt, which produces weld lines on flat surfaces; large overall installation height; and inaccurate scale-up from single-cavity development molds to multi-cavity production that uses a different nozzle type.
Most of the time, the regulators are a needle valve -- a tapered pin that mates to a similar taper in the fitting.
Tenders are invited for Supply of swagelok make integral bonnet needle valve 10mm od ends ss-1rs10mm
The Century system is equipped with both height and needle position sensors to maintain consistent needle valve positioning.
Tenders are invited for Needle valve enquiry for panki bhusawal patratu project
Also new from Manner is a wear-resistant needle valve for abrasive materials.
The M3 micro threaded needle valve, with M3 threaded inlet and hose barb outlet, is for applications where space, leak-tightness, durability and light weight are required.
Users can choose from bolted bonnet, outside screw and yoke bolted bonnet, and integral screwed needle valve process monoflange assemblies.
The needle valve is totally contained within the nozzle housing and does not pass through the hot manifold.