On the design and selection of vacuum units
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Recently, the company wants to purchase a set of vacuum units. We previously used water ring Roots compressors, but due to issues with water treatment and corrosion, we have now switched to screw Roots compressors. Through study, I learned some theories about vacuum units, but there are also many questions. Moreover, I found that the vacuum systems used in our company are innovative both in terms of the equipment (which is imported) and in terms of design (using a parallel configuration); no information regarding such a design could be found on the Internet or in forums. Professionals working with vacuum equipment are welcome to come and discuss.
There is a lot of practical experience to share, but many professional matters require experts to address them
Please describe clearly the features of the device and the novelty of its design; pictures would be ideal. For netizens to discuss and learn from*.
The vacuum units in our company are connected in series, with the screw pump serving as the pre-pump and the rotary vane pump acting as the main pump
We have a large number of vacuum systems; some are entirely imported, while others use a combination of imported and domestic ones. How many stages do your Roots systems have in total? We are usually level 3
It’s not convenient to post workshop photos online.
The advantage is that it allows for the use of rotary pump models of smaller capacity in the unit. Our final-stage Roots pump has the same model as the preceding Roots pump, but they are connected in parallel and operated together to increase the pumping speed.
Draw a simple diagram by hand to help everyone understand; it’s still not very clear
The screw is of the first stage, while the Roots pump is of the second stage. Could you please tell me the brand of your family’s Roots and screw pumps?
Domestic； The screw pump is from Taizhou Xingguang, while the Roots pump is from Zhejiang Vacuum. The imported ones are from Thessaloniki. It’s just level 1 or 2; presumably the volume of the tower or reactor isn’t very large, or the vacuum requirement isn’t high. Are your operating conditions better?