The advantages and disadvantages of globe valves and
gate valves are compared as follows.
Advantages of globe valves: good closing performance
The
globe valve is a type of plate valve with strong sealing performance, simple operation, and long service life. A globe valve can stop flow or regulate flow in a pipeline. Its characteristic is that the door panel moves vertically to separate the medium, so it has good closure and can completely cut off the fluid in the pipeline. Therefore, under the circumstances where low flow is required, it is more appropriate to choose a globe valve.
Disadvantages of globe valves: large pressure loss
The disadvantage of globe valves is some limitations when used to regulate flow, because when the valve is closed, the resistance of the fluid increases, creating pressure on the pipeline, thereby reducing flow, and the size of the opening directly affects pressure loss. In addition, the action of the door closing plate will have a significant impact on the fluid movement in the pipeline, resulting in significant vibration and noise during the use of the globe valve.
Disadvantages of globe valves: high operating costs
The cost of using and maintaining gate valves is lower than that of globe valves, but they are more likely to be replaced by globe valves in situations where low flow is required. Therefore, according to the actual situation, multiple factors need to be comprehensively considered when selecting gate valves or globe valves.
Advantages of gate valves: not easily clogged
Gate valves have cylindrical or rectangular gate plates that can move linearly along the axial direction of the pipeline. For viscous liquids or gases flowing at high speeds, suitable circumferential gate valves can be selected. They are not easily blocked by particles in the medium and can also work well in situations with high sewage and particle content.
Disadvantages of gate valves: average sealing effect
During the closing process, gate valves are sealed by compressing the sealing body through the door panel, which is not suitable for situations with high vibration, and its sealing effect often directly affects its service life. Therefore, gate valves are generally not recommended for situations with high sealing requirements.
Advantages of gate valves: low operating force
The lever function of a gate valve is 0, making it easier to operate than a globe valve in the event of pipeline interruption. Moreover, the operating force is smaller than that of a globe valve, making it easier to quickly open or close the valve. This makes gate valves more suitable than globe valves in situations that require frequent adjustment.
In summary, both globe valves and gate valves have their advantages and disadvantages, and the selection and use need to be determined based on specific situations and needs. Meanwhile, we should pay attention to its maintenance and upkeep during use to extend its lifespan.
