A casting valve configured to supply a melt of a casting device includes a valve housing including a melt channel connection as an inlet and a valve outlet as a run-out. A melt channel is configured to be pressurizable via a casting pressure. A valve compartment is configured to receive the melt. The valve compartment is connectable via the melt channel connection with the melt channel. A closing device is configured to modify a cross-sectional surface of the valve outlet. A post-compression piston is configured to post-compress the melt after a completion of a mold filling.