VICKERS PFR5-8-F-0-1.6

Correct, the flow is set at 10 litres per minute and stays there. The fixed pressure compensated style means it holds that rate steady regardless of load pressure swings, but you're not going to dial it up or down like you would with an adjustable valve. If your circuit needs a set, unchanging flow without anybody turning a knob, that's exactly what this is built to do. For applications like refuse haulers or harvesters where you want consistent performance without manual intervention, that fixed characteristic is usually a feature, not a drawback.