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needle valve

   Also found in: Dictionary/thesaurus, Acronyms, Wikipedia 0.01 sec.
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.


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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.
The new ball and needle valves Co 20K Hi-Pro ball valve and 20K H-Series needle valve Co are fabricated from 316 stainless steel as standard, and offered in Nace (corrosion) compliant and HCT (heat code traceable) versions.
Another remarkable development was the 'magnetic carburettor' in which an electrically operated needle valve could be used to cut off the fuel supply when the car was coasting, thus economising on petrol.
 
 
 
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