Sperreinrichtungsüberprüfvorrichtung and uses thereof

The invention relates to a - preferably automatically - Absperreinrichtungsprufvorrichtung (40) for checking the tightness of a shut-off device (32) for liquid fuels, wherein the blocking device (32) includes a fluid passageway (52) between a first region and a second region of a liquid-fuel line for the preferably automatically locks with a fuel pressurized liquid fuel or open, wherein the Absperreinrichtungsprufvorrichtung (40) comprises: a measuring chamber (54) defined in the fluid passageway (52) between the shut-off device (32) and a preferably automatic closing device (56) and by closing the shut-off device (32) of the first region and by closing of the closing device (56) from separable the second region, a pressure generating means (150), which is connected to the measuring chamber (54) for acting on in the measuring chamber (54) befindlichem fluid with a test pressure that is less than the fuel pressure, and a pressure detecting means for detecting a change in pressure in the measuring chamber (54). In addition, uses of such Absperreinrichtungsprufvorrichtungen are described.