Abstract: A valve for use with a liner bag for a container, and a liner bag including a valve, the valve including a valve member located in a valve seat and having a valve opening for egress of liquids from the liner bag. An operating lever is positioned outside the liner bag. A protective cage extends in front of the valve opening, the cage being positioned inside the liner bag to prevent the wall of the liner bag from collapsing into the valve opening during emptying of liquids from the liner bag. A flange may extend around the valve seat to retain the valve in the wall of the liner bag. This arrangement prevents the liner bag wall from clogging the valve during discharge of the bag's contents.