I have a beginner-level question about a bypass pipe for all the experts here...
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May I ask whether the flow rate in the bypass pipe can be different from that in the main pipe? Can it be allocated in a predetermined manner? For example, could the flow rate in the bypass pipe be 1/4 or 1/10 of that in the main pipe? How is this achieved? Or is such a function not available at all? Here’s the situation: a mass flow meter is used to measure the flow rate of the fluid. Suppose the actual flow rate in the main pipe is between 50 and 100. But to protect the flow meter, it is desired that the flow rate of the fluid passing through it be below 10... So, is it possible to install a bypass pipe so that the flow rate in it is only 1/10 of that in the main pipe? In other words, is it possible for the bypass pipe to achieve this function, namely to reduce the flow rate? ... Last edited by automation_njut on 2009-3-14 17:09]
To make the flow rate in the bypass pipe different from that in the main pipe, it should be possible to achieve this by using a pressure difference bypass valve. I work in the theoretical field; I haven’t used such a valve in practice yet. . You can give it a try yourself. :L
Please, anyone who knows about this, could you help me out? Thank you... I saw someone say that a mass flow meter can be installed on a bypass pipe, as the flow rate in the bypass pipe is lower than that in the main pipe, which helps to reduce wear on the mass flow meter.... Last edited by solo on 2009-3-14 16:12]
I didn’t understand your question. Do you want the bypass pipe to have its own flow rate, or are you choosing a location for installation in order to fit a mass flow meter?
To be more specific, if the flow meter is used for billing, it’s best not to include a bypass pipe; however, if it’s necessary for the process, a bypass pipe can be used. Valves that are completely closed are rare. With a bypass pipe, the flow meter may give inaccurate readings; if it is installed on the bypass pipe, it is controlled by a bypass valve, and valves should be placed before and after the flow meter to facilitate maintenance.
It should be possible. On the pipeline, a mass flow meter can be installed to control the opening degree of the control valve; however, the pressure in the pipeline changes significantly
What is searched for is a device that can be adjusted; it involves using a differential pressure bypass valve to control the bypass flow rate.
It’s impossible to do that; it’s too exaggerated...
I don’t know. However, our mass flow meters do not have a bypass. I understand that the advantage of mass flow meters is their accuracy in measurement; would a bypass affect this accuracy? If maintenance is needed, valves can be added to shut off the bypass. Last edited by Pseudo Xiaobao on 2009-3-14 19:55.]
LZ: “Here’s the situation: A mass flow meter is used to measure the flow rate of a fluid. Suppose the actual flow velocity in the main pipeline is between 50 and 100. But in order to protect the flow meter, it’s desired that the flow velocity of the fluid passing through it be below 10... So, is it possible to install a bypass pipe so that the flow velocity in this bypass pipe is only 1/10 of that in the main pipeline? In other words, is it possible for the bypass pipe to achieve this function? The goal is to reduce the flow velocity...” It seems that such a function doesn’t exist; that’s my personal opinion