Best Way to Control Vacuum Level in a series of Tanks

In summary, the best way to maintain the vacuum levels in two tanks attached to a vacuum header is to use a set of globe valves or an air bleed/leak with a needle valve. The piping is 1" and without any valves, the ejector is able to reach 550 mmHg in both tanks. It is recommended to use an old-school manual solution, such as adjusting the valves every 20 minutes, rather than a PID control loop. The frequency of adjustment will depend on the bleed rate and the need to clear any blockages in the orifice.
  • #1
rollingstein
Gold Member
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I have two tanks next to each other, first needs to be kept at 200 mmHg vacuum & the second at 500 mmHg. Both are attached to a vacuum header which can achieve a 600 mmHg vacuum by means of a water jet ejector.

What is the best way to maintain the vacuum levels? Would a set of globe valves work? Or should I have an air bleed / leak? A needle valve?

If it matters, the piping is 1". So far without any valves the ejector has no trouble developing 550 mmHg in both tanks simultaneously.

The process is fairly static so I'm looking more for an old-school manual solution (that an operator adjusts, say, once every 20 minutes) rather than some fancy PID control loop.
 
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  • #2
rollingstein said:
best way
How many "Best" ways were you seeking? Particularly, "Old school?" Bleed rate through whatever your choice of valve is going to determine frequency of adjustment, how often you'll have to switch wide-open to blow lint and other detritus from the orifice, and such forth, and so on.
 

Related to Best Way to Control Vacuum Level in a series of Tanks

What is the best way to control the vacuum level in a series of tanks?

The best way to control the vacuum level in a series of tanks is to use a vacuum regulator. This device is designed to maintain a constant vacuum level by adjusting the flow of gas into the tanks.

How does a vacuum regulator work?

A vacuum regulator works by sensing the vacuum level in the tanks and adjusting the flow of gas into the tanks accordingly. When the vacuum level is too high, the regulator will decrease the gas flow, and when the vacuum level is too low, the regulator will increase the gas flow to maintain a constant level.

What factors can affect the vacuum level in a series of tanks?

Several factors can affect the vacuum level in a series of tanks, including the gas flow rate, temperature, pressure, and any leaks in the system. It is essential to monitor these factors and make adjustments as needed to maintain the desired vacuum level.

Can the vacuum level be controlled manually?

Yes, the vacuum level can be controlled manually by adjusting the gas flow rate into the tanks. However, this method may not be as accurate or efficient as using a vacuum regulator, and it requires constant monitoring and adjustment.

Are there any safety precautions to consider when controlling the vacuum level in a series of tanks?

Yes, there are some safety precautions to consider when controlling the vacuum level in a series of tanks. It is essential to follow proper procedures for handling and storing compressed gases, regularly check for leaks, and have proper ventilation in the area. It is also crucial to follow the manufacturer's instructions for the vacuum regulator and other equipment being used.

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