The testing system consists of two autonomous conveyor belts, each with one loading section, 20 pallets, 3 test stations with drainage device as well as an unloading section with trays. All test stations with clamping devices feature identical designs. The test consists of the following individual tests: Piston setting, operation test, leakage measurement and characteristic curve determination. At the end of the test, the valve tested is drained as far as possible.