On continuously adjustable directional valves: Dependency of the load pressure on the input signal with closed working lines around the hydraulic zero (Figure D 73 a).
On continuously adjustable pressure valves: Dependency of the "pressure" output signal on the input signal in closed working lines (b) (E DIN 24 311).
Figure D 73: Pressure (signal) function; a) Continuously adjustable directional valve, b) Continuously adjustable pressure valve