Globe valves are used in operations which require frequent changes in flow rate. Unlike the gate valve we talked about last week, any wear on the plug or the valve seat should be uniform, making a leak less likely, even after extended use.
In normal operation, the direction of flow comes from under the plug. In high temperature operations, the direction of flow may be changed so that flow comes from the opposite direction. Doing so keeps the stem at a constant higher temperature, which decreases the chance that it will contract and lift the plug off of the valve seat..