Selection of vacuum buffer tanks
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I recently took on a project to upgrade a vacuum system; each vacuum pump has a capacity of 300 L/S, with a total of 4 pumps. In front of each vacuum pump there is a buffer tank. Behind the buffer tank, 4 pipes (DN150) are connected to a larger pipeline with a diameter of DN250. From the upper part of this larger pipeline, 6 smaller pipes emerge to supply 6 vacuum application points (-90Pa). I’m noticing instability, or rather an imbalance, in the vacuum pressure distribution. I’m thinking of replacing this larger tube that serves as the distribution platform with a larger vacuum buffer tank – will this improve the situation? If there is improvement, how should I choose my buffer tank? Please leave a message if there is any additional data needed. Waiting online.
If possible, send a simple diagram; that will help clarify your current issue better
The computer is encrypted; screenshots are not possible. . . .
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If the distribution is uneven, check whether the pipeline resistance from each of the 6 usage points to the vacuum pump is the same
Is it possible to use one pump for a vacuum point, with none of them being connected to each other?
Due to inconsistencies in pipeline pressure losses, it’s difficult to achieve complete consistency. If the difference is significant, it might indicate insufficient capacity; if the capacity is sufficient, the pressure at the point of use should be relatively close. That’s how I understand it
You can draw a diagram by hand to show what the diameter of the 6 small pipes is; otherwise, it’s difficult to determine the positions of the pipes. It’s also unclear whether there are pressure gauges on the 250 pipes, what the pressure levels are in those 6 locations, and whether the pressure in the buffer tanks remains stable – there are many things that aren’t known
A flowchart is needed to make a judgment, but overall, adding more tanks has a very limited effect; their role in maintaining balance can basically be ignored, and the number of tanks should be reduced as much as possible!