Globe valve a valve in which the flow of water is controlled by a movable spindle which lowers to a fixed seat, thereby restricting the flow through the valve opening; the spindle is fitted with a washer to provide tight closure; usually enclosed in a chamber having a globular shape.
Globe Valve are named for their spherical body shape. The two halves of the valve body are separated by an internal baffle which has an opening forming a seat onto which a movable plug can be screwed in to close (or shut) the valve. In globe valves, the plug is connected to a stem which is operated by screw action in manual valves. Typically, automatically controlled valves are of the sliding stem type. These globe valves have a smooth stem rather than threaded and are opened or closed by an actuator assembly. When a globe valve is manually operated, the stem is turned by a handwheel.
Although globe Valves in the past had the spherical bodies which gave them their name, many modern globe valves do not have much of a spherical shape, but the term globe valve is still often used for valves that have such an internal mechanism. In plumbing, valves with such a mechanism are also often called stop valves since they don’t have the global appearance, but the term stop valve may refer to valves which are used to stop flow even when they have other mechanisms or designs. |
