Invention Grant
US07766041B2 Flow force reduction by incremental pressure drop 失效
通过减压减压减压

Flow force reduction by incremental pressure drop
Abstract:
A fluid flow control device for improving, for example, valve operation by reducing “error forces” occurring due to fluid communication between ports of a valve having two or more ports. Incremental pressure drop passages bleed incrementally the flow of fluid between first an second ports as the valve spool is moving between the first and second positions to decrease the pressure differential generated force exerted on the spool whereby the energy required to be applied to the spool for moving the spool between the first and second positions is decreased.
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