Hydraulic circuit that is predominantly used in mobile hydraulics. Here the directional valves are closed in the centre position; the flow rate is either routed
- Via an idle circulation valve (on constant pumps) or
- On variable pumps with power limiting and pressure limitation set to minimum flow at pressure or
- On a variable pump with p/Q control system set to minimum flow with a different pressure above zero (standby pressure). This circuit is a load sensing system.
Opposite: open centre system