The MTQA manually adjustable flow control valves are used for pressure-independent adjustment (supply) of a hydraulic actuator and thus ensure constant actuator speeds. MTQA flow control valves have an integral pressure relief function to protect the actuator and the hydraulic system. As the 3-way version, they divide the inlet flow into a constant-flow / priority-flow portion and a surplus-flow portion. The surplus flow must be routed to tank.