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There are multiple vacuum chambers, with one being opened every 1-2 minutes; how can one control the sequence in which the vacuum level in these chambers is reached?

2020-08-21View Original

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Gentlemen, I have 5 vacuum chambers with a volume of around 0.6 cubic meters each, all sharing the same vacuum system. The valve of one of these chambers is opened every 1–2 minutes. How can this be controlled so that opening a subsequent chamber does not affect the vacuum level in the previous chambers? I want to reach the vacuum level sequentially based on the order in which the vacuum valves are opened. However, when the valve of the second vacuum chamber is opened, the vacuum level in the first chamber has already reached a certain limit; it is necessary to equalize the vacuum levels of both chambers before they can continue to increase together. Is there any way to control it?
Reply #22020-08-21
If the pump flow rate is high enough and the main pipe is thick enough, with the branch pipes being thinner or the valves adjusted to a lower setting, keeping the pressure in the main pipe below the pressure in the container will prevent air from leaking in
Reply #32020-08-21
It is recommended to install a check valve on the vacuum extraction tube of each tank
Reply #42020-08-21
The check valve creates resistance, preventing the vacuum level from dropping
Reply #52020-08-22
I’ll just add a buffer tank; first, I’ll evacuate the buffer tank to a certain level of vacuum, and then open the valve – that should work. But new problems may arise: a sudden drop in pressure could lead to loud sucking noises and even explosions.
Reply #62020-08-22
When gas is introduced into the two chambers equipped with check valves, chambers 1 and 2 become connected, forming a single container. Will a vacuum level be achieved in chamber 1 only after the vacuum level in chamber 2 also reaches the set value?
Reply #72020-08-22
After drawing, close the valve of that vacuum tank; once the last one has been drawn, open all the valves at the same time.

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