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A miniature needle valve

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Original languageEnglish
Title of host publicationProceedings of the Third Workshop on Digital Fluid Power, October 13-14 2010, Tampere, Finland
EditorsArto Laamanen, Matti Linjama
Publication statusPublished - 2010
Publication typeA4 Article in a conference publication


It has been suggested that in order to obtain “the perfect valve” one should use large number of parallel connected, just one size of on/off-valves, to control the flow rate. With commercially available hydraulic on/off-valves, this is not practically reasonable because the number of valves needed is from tens to few hundred and the use of commercial on/off-valves leads to too big valve packages. In this paper a simple unidirectional spring return needle valve is miniaturized to size small enough to be used in digital flow control units consisting several dozens of valves. The most important design parameters are small size, operation on industrial hydraulic pressure level, fast response time and reasonable flow rate. A major problem in commercial valves is the size of the solenoid actuator thus the design includes both a hydraulic part and a solenoid actuator for it. Simulations, calculations, measurements and construction of the valve are presented. Capabilities of designed valve are discussed.

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