Comparison between gate valve and globe valve

A comparison of the advantages and disadvantages of globe valves and gate valves is as follows:

1. Advantages of stop valve:

good closing performanceThe stop valve is a plate type valve with strong closing and sealing performance, simple operation and long service life. The stop valve can stop the flow or adjust the flow in the pipeline. Its characteristic is that the door panel moves in the vertical direction to isolate the medium, so it has better closing performance and can completely cut off the fluid in the pipeline. Therefore, when the flow rate is not large, it is more appropriate to choose a stop valve.

2. Disadvantages of stop valve:

large pressure lossThe disadvantage of the stop valve is that it has some limitations when used to regulate flow, because when the valve is closed, the resistance of the fluid becomes larger, creating pressure on the pipeline, thereby reducing the flow, and the opening size directly affects the pressure loss. In addition, when the stop valve is in use, due to the action of the closing plate, it will have a greater impact on the fluid movement in the pipeline, causing greater vibration and noise.

3. Disadvantages of stop valve:

higher cost of useGate valves cost less to use and maintain than globe valves, but they are more likely to be replaced by globe valves in situations where smaller flow requirements are required. Therefore, depending on the actual situation, multiple aspects need to be considered when selecting a gate valve or globe valve. factor.

4. Advantages of gate valve:

not easy to blockThe gate valve has a cylindrical or rectangular door plate and can move linearly along the axis of the pipeline. For viscous liquids or gases flowing at high speed, a more suitable circumferential gate valve can be used at present, which is not easily affected by particles contained in the medium. It can work better in some situations with high content of sewage and particulate matter.

5. Advantages of gate valve:

small operating forceThe leverage effect of the gate valve is 0. It is easier to operate than the stop valve when the flow of the pipeline is interrupted, and the operating force is smaller than the stop valve, making it easier to open or close the valve quickly. This makes the gate valve more suitable than the stop valve in some situations that require frequent adjustments. Be applicable.

6. Disadvantages of gate valve:

average sealing effectDuring the closing process of the gate valve, the door panel compresses the sealing body to achieve sealing. However, this sealing method is not suitable for occasions with large vibration, and its sealing effect often directly affects the service life. Therefore, in occasions with high requirements for sealing effect, , it is generally not recommended to use gate valves.

In summary, both stop valves and gate valves have their advantages and disadvantages, and the selection and use need to be decided according to the specific situation and needs. At the same time, you need to pay attention to its maintenance and upkeep during use to extend its service life.