Is there a sequence for the mass flow meter and the control valve?
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Most mass flow meters I’ve seen are designed to be placed in front of the control valve assembly; now I’ve encountered one that is designed to be placed behind it. Is this a design error, or is there no such requirement?
Personally, as long as the installation distance between the two meets the requirements, there should be no problems with the front and back parts.
Firstly, considering the need for accurate measurement, these devices are installed in front of the valve; in actual production, even if the straight sections before and after the valve meet the requirements, inaccurate measurements may still occur if the device is installed behind the valve.
If the mass flow meter is installed at the back, it can lead to insufficient fluid filling the meter, and some fluids may form a two-phase flow, resulting in inaccurate measurements by the meter and triggering alarms； Therefore, in the case of instruments, mass flow meters are usually installed at the front; you can consult the design institute to find out the reason behind such a design
Our C4 flow meter is installed behind the control valve, and sometimes the problem mentioned by everyone occurs – the flow meter resets to zero
Flow meter for light naphtha to tank farm