Is the leakage level related to cavitation?
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Dear sea gods, is the leakage level related to cavitation? Please explain the reason; I’d like to learn from it, thank you!
The leakage level should be determined based on the process requirements; in other words, the process does not allow a certain maximum amount of material to pass through when the valve is fully closed. Cavitation occurs when the flow velocity of the medium is too high, and it tends to happen when the valve is open to a small degree. Therefore, I don’t think there is a necessary connection between the two. The leakage level is an indicator of the valve when it is fully closed, whereas cavitation is a phenomenon that can occur when the valve is operating at a certain degree of opening.
The leakage level is related to cavitation. The higher the leakage level, the lower the pump inlet pressure, approaching or falling below the required net positive suction head. Treat each case on its own merits.
Could you explain it in relation to the valve’s leakage rating? Thank you!
The leakage rating only indicates the valve’s sealing performance and is not necessarily related to cavitation. First, one needs to understand the principle of cavitation: it occurs when bubbles formed after fluid passes through a throttling element burst, causing damage to the surrounding area. When the valve is closed, this phenomenon does not occur, no matter how low the leakage rating is; at most, there may be wear caused by erosion.
Personally, the sixth floor seems to be the right choice; the leakage level can be avoided, and flashing does indeed occur
Cavitation occurs when there is a large difference in flow rate before and after a flow-restricting element (usually such elements as pumps or valves that contain cavities); when high-pressure fluid with low flow rate enters such a large cavity, a two-phase change takes place instantly, resulting in the vaporization of some of the fluid and the formation of bubbles. Bubbles have a significant erosive effect on metal materials, leading to corrosion. It generally has little to do with the leakage level; the internal leakage of the valve is usually not sufficient to cause cavitation. The occurrence of cavitation is due to the neglect of the minimum flow rate.
So it was you who posted this thread. I never check the names when replying; I need to be more careful next time: lol