Hydraulic Servo Valve Port Shape

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Servo valve bodies are machined with three common port shapes as shown in Fig. 11.13. The effect of port shape on flow is shown in Fig. 11.14. A full annulus port gives the highest flow per unit of spool displacement or, correspondingly, per unit of current input to the torque motor. The valve flow characteristics will be important when the valve transfer function is defined in a later section.

 Hydraulic Servo Valve Port Shape

 Hydraulic Servo Valve Port Shape

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