A bypass is provided at the outlet of the Roots blower (the issue description has been updated)
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This post was last edited by sethfly on 2009-12-1 at 14:54. The Roots blower was purchased for experimental use, but there is excess flow; to be safe, about half of that flow needs to be released, and then adjustments should be made within the remaining half of the flow rate. The goal is to obtain multiple flow rate data points – for example, during normal experiments the maximum flow rate required is only 300 m3/h, so adjustments can be made within the range of 50–300. It is said that Roots blowers have the characteristic of forced air delivery, meaning that fluctuations in system pressure have little impact on the flow rate. If a vent bypass is installed at the outlet of the Roots blower, equipped with a vent valve, and a flow control valve is added to the main pipe, would this help to increase the flow rate? PS: No fear of waste; it’s for temporary use only – taken apart after conducting the experiment
It is possible to adjust the flow rate; it’s best to install a circulation circuit to reduce waste.
2# 386043164 Why is it necessary to add a bypass circuit? It doesn’t have to be a closed-loop system either. It depends on the gas source medium; for air, it’s not a problem. Moreover, if you want circulation, you’ll need to add a cooler as well.
Of course, we use it that way
What to waste? The medium isn’t soda. The medium in the fan duct is not air yet. I really didn’t install a circulation circuit on the ductwork. I’m not sure if it’s possible or not. Has this brother designed something like this? Share some experience.
There is no need for a flow control valve; it’s simple enough to install a manual valve on the vent line, and adjust the valve to an appropriate opening degree based on the actual operating conditions. I’m not sure if enough has been added; running it for a long time seems a bit wasteful……
This post was last edited by vince11 on 2009-12-1 at 14:58. The Roots blower is a constant-volume blower that comes equipped with a bypass valve for adjustment; however, it is not used for adjustment purposes but only when starting the Roots blower. In practice, the following approaches can be taken for adjustment: 1. If it is air, there is no problem; as mentioned above, installing a manual valve will solve the issue. There is no need to set up an additional self-circulation pipeline, as that would require an extra cooler, and otherwise the Roots blower itself cannot handle it – the gas continuously circulating would cause heating due to the work done. 2. If gaseous raw material is used, an additional self-circulation pipeline can be installed, along with a cooler to lower the temperature of the gas returning to the blower, thereby reducing the heating experienced by the Roots blower ； It is also possible to connect it to the system gas supply, which saves gas while preventing self-circulation heating by eliminating the need for a cooler
7# vince11 A regular control valve will suffice
:Lol, the device selection you’ve chosen is problematic, OP!