Installation relationship of flowmeter and control valve
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As the title suggests, I would like to ask the experts: is it common to install flow meters behind control valves in practice? Please help!
It is generally installed in front of the control valve to prevent the control valve from affecting the flow pattern; if it is to be installed behind the control valve, there must be sufficient straight pipe section.
It can be placed after the control valve, but the installation of the flow meter must comply with the relevant requirements.
When determining the relationship between the flow meter’s installation location and the control valve, the basic principle is to place it on the side where the control valve operates stably, regardless of whether it is before or after the valve. However, in actual process pipelines, the conditions are more stable before the control valve, though stability can also be observed after the valve.
It’s usually in the front; it’s rare to see it at the back
It doesn’t matter whether it’s before or after. As long as it meets the requirements, that’s fine!
Generally, a valve is installed in front of the flow meter, so that when the control valve operates, it has little impact on the stability of flow measurement. Installing a control valve poses a risk of unstable flow rates
There are way too many cases of improper installation. We have such cases here as well; they still work, more or less
There are definitely flow meters installed behind the control valves on site, but this is not in accordance with standards and may have a significant impact on the measurement accuracy of the flow meters.