Feel free to ask questions regarding water ring vacuum pumps
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I work for a manufacturer of water ring vacuum pumps, a well-known large enterprise in China. To avoid being accused of advertising, I won’t mention the company’s name. If you have any questions or need information regarding water ring vacuum pumps, feel free to ask below. I will definitely help you answer them as soon as I have time. Thank you all.
Large water ring vacuum pumps take a long time to create a vacuum
Because when a water ring vacuum pump starts, the impeller must rotate inside the pump to throw water into a liquid ring shape; it is only after one cycle that a vacuum can be created. When the pump starts, there is little water inside the pump, and a water ring cannot be formed; therefore, it takes some time to create a vacuum. Suggestion: If the pump is not to be left idle for a long time, it is not necessary to drain the water from the vacuum pump. Conventional pumps are equipped with overflow valve mechanisms that lower the water level inside the pump without completely draining it; as a result, when the pump is started again, the presence of some water inside helps improve performance slightly.
May I ask: Does a water ring vacuum pump operate in a state where it produces a roaring noise, or does it operate by adjusting the inlet valve to prevent such roaring noise?
The situation you are referring to is likely cavitation; it can be addressed by lowering the water temperature and using an air ejector.
Can a water ring pump operate continuously in a roaring sound condition? If this pressure is required in production, how can production be met without damaging the equipment?
If the vacuum pump operates at this pressure for an extended period of time, it will eventually have an impact on the pump’s impeller, causing the impeller to crack and fall off and thus damaging the pump. It is recommended to lower the water supply temperature, or install cavitation protection devices or air ejectors. The impeller material can be changed, by replacing it with a better stainless steel impeller or an entirely cast impeller.
For example, at an absolute pressure of 5 kPa, using a water ring vacuum pump will inevitably result in operational noise; otherwise, the vacuum level will not meet the requirements for production. How can we control things so as to meet production requirements while also preventing the impeller from operating in an erosion condition? Thank you.
Thank you so much for your explanation; I’ve learned a lot from it
An absolute pressure of 5 kPa(a) is no problem; the key is the water temperature……