Series MTCA priority flow control valves provide a constant, pressure-compensated, flow of hydraulic fluid in one direction. They divide an inlet flow into a constant, priority, flow and a surplus flow. Both flows can be pressurised independently of each other and both are protected by an adjustable pressure relief valve functioning in the inlet flow.
If the priority flow stops (e.g. when cylinder reaches its end stop), then the oil is throttled down from load pressure and is combined with the surplus flow. If the surplus flow also stops, then the total inlet flow is relieved at the relief valve setting and exits through port T to tank.
