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.