Insufficient vacuum level
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What could be the reasons for insufficient vacuum level after major repairs to the vacuum system pipes?
Check for any leaks, and also examine whether the vacuum pump valves are damaged
Is there any leak in the pad?
First, check if there is a problem with the pump’s own pressure, and then try the pipeline. If it’s difficult to measure negative pressure, measure the pipeline under positive pressure instead.
Yes, I’m gathering information and preparing for a thorough investigation in all aspects.
The original poster also mentioned that the vacuum level was affected after the major repair; personally, I would suggest starting by checking the pipe connection points that were modified during the repair work, or those that were altered while preparations for the repair were being made. Personally, I think that when all process parameters remain unchanged, the reason for insufficient vacuum level is a problem with the rigid connections in the pipes; of course, there are other possible reasons as well, and that would depend on what changes were made during your maintenance work
The tower was overhauled, the pump and pipeline systems were replaced, and some of the threaded pipes connected to the tower were discarded.
Based on the preliminary assessment, there seems to be a problem with the vacuum pump; the system is still under verification.
The pump bodies have aged; one of them has just been repaired, and its performance parameters after startup are much better than those of the other two pumps when they are operating at full capacity.
It’s kind of our bad luck too – as soon as we started using our system equipment, the performance of the vacuum system was very poor. Fortunately, this pump was used in time. The next step is to repair the remaining two units in batches. When two vacuum pumps are connected in parallel, which parameters will change?