Hydraulic Flow Feedback Two Stage Valve

The valve consists of three basic elements: a main control stage comprising a four-way meter-in/meter-out spool, a force motor operated pilot valve and flow sensing feedback element. The bidirectional flow sensor situated in one of the two service lines converts the flow to and from the actuator into a corresponding pressure differential fed hack to the pilot spool. The loop is dosed by comparing the force set up by this pressure differential with the magnetic force genentted by the current acting on the force motor coil. When a new equilibrium condition has been reached. The two forces acting on the pilot spool are balanced. thus returning the pilot valve to neutral which. in turn. locks the main spool in the position consistent with the demanded flow rate.

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This entry was posted on Thursday, January 5th, 2012 at 3:25 am and is filed under Hydraulic Flow. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.