High response proportional valves are constantly adjustable directional valves, whose static and dynamic behaviour is largely comparable to that of the servo valves (Figure R 20). These are particularly suitable for use in control circuits and are better than proportional valves, as their natural frequency is greater and the control edges have an exact zero cut. As electromechanical signal converters, high response proportional valves have a proportional solenoid.
Figure R 20: Bode diagram of a high response proportional valve