What is Servo valve?
Servo valve control the spool movement by electrical torque motor.It has feed back of spool movement.
What is the difference between servo and proportional valve?
| Servo Valve | Proportional Valve |
| It is a closed loop system. It has feed back for spool movement. | This is an open loop system.Feed back not available. |
| Servo valve has electrical torque motor for spool movement. | It has spool movement like solenoid valve. The power supply to coil is controlled by regulator. |
| Expensive | Less cost. |
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