The gradual change in spacing between the disk and seat ring gives the globe valve good throttling ability. Globe valves are commonly used as an on/off valve, but they may be used for throttling systems. The flow rate for the media is determined by the distance between the valve plug and the valve seat. When the globe valve is open, the fluid flows through the space between the edge of the disk and the seat. This helps to maintain a tight seal when the valve is fully closed. In most cases, globe valves are installed with the stem vertical and the fluid stream connected to the pipe side above the disk. As the fluid travels through the valve it changes direction many times and increases the pressure. The annular space between the disk and seat ring gradually changes to allow fluid flow through the valve. This is done with the perpendicular movement of the disk away from the seat. Globe valves have a disk which can completely open or completely close the flow path. Globe valves use a linear motion disk and function to start, stop, and throttle fluid flow. Industrial Valves can be classified in a number of different ways including method of control and valve function. Not good for clean or sterile applications Globe valves can be used in systems that require frequent stroking, vacuum, and systems that have a wide range of temperature extremes.įind Globe Valves by Specification or See Our Directory of SuppliersĬantilevered mounting of the disk to the stem The disadvantages include low-flow coefficients and a longer operating time because the operator must turn the handle and stem many times to ensure the valve is completely open or completely closed. They have excellent and precise throttling ability for high-pressure systems. Globe valves have many advantages and disadvantages for users. Recently globe valves have lost their traditional round body-shape. Since their shape is similar to other valve bodies, positive identification must be made based on internal piping. As their name suggests, globe valves are linear motion valves with rounded globular shaped bodies.
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