The vacuum fluctuations in the tower are unstable; what causes such large fluctuations?
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We are currently in the debugging phase; the washing pipes have been completed and purged. Now a Roots vacuum pump is being used to create a vacuum, with the target vacuum level in the tower set at 2000 PA. However, it’s not possible to reach this level of vacuum, and the value fluctuates up and down. What could be the reason for this?
1. There may be areas where the vacuum is leaking. 2. There may still be moisture in the piping system. 3. There may be impurities in the system.
There should still be water in the pipes that hasn’t dried out, but why does the presence of water have an impact on the vacuum?
Water vaporization--------------------
Please search on Baidu: water saturation vapor pressure; the boiling point of a liquid decreases as pressure drops
If the pump that precedes your Roots pump is a water ring vacuum pump, then no other configuration will enable it to achieve the desired performance……
It is also possible that the load of the vacuum pump itself is not sufficient to meet this requirement.
The most likely explanation is a leakage; try to find out what the local atmospheric pressure is. If the absolute pressure in that area is low, it’s likely that the desired level of suction won’t be achieved. Check as well whether there is anything wrong with the equipment itself