Abstract: An air actuated internal valve for a cargo container. The valve generally includes a valve base having a valve disk seat and a line connector extending therefrom. A valve stem having a first end is fixed to the valve base and a valve disk is slidingly mounted on the valve stem. A cylinder assembly is connected to the valve disk and a piston is positioned within the cylinder assembly and fixed to a second end of the valve stem. An air passage communicates through the base and the valve stem in order to provide air to an air space between the piston and a top internal portion of the cylinder assembly. When pressurized air is introduced into the air passage, the cylinder assembly (and thus the valve disk) moves upward, unseating the valve disk from the valve seat. This opens the valve and allows fluid to flow there through.