The MTQE / MTKE manually adjustable flow control valves are used for pressure-independent adjustment (supply) of a hydraulic actuator and thus ensure constant actuator speeds. MTQE / MTKE valves are "switchable" flow control valves. This means that the flow can be set manually and the valve is activated by the switching valve. When the valve is deactivated, all of the oil flows to tank via the surplus flow port. The valve's manual setting is retained.