If the medium in the pipeline flows in reverse, will the flow meter still detect flow?
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If the medium in the pipeline flows in reverse, will the flow meter still detect flow?
It depends on the type of flow meter you are using; I think that flow meters such as electromagnetic flow meters and ultrasonic flow meters will all provide some indication, though it may be inaccurate or the reading may be on the low side. A differential pressure flow meter will not give an indication, or it will display a negative value.
There is still some flow, but the differential pressure transmitter does not produce any output. Electromagnetic flowmeters inherently have functions for displaying reverse flow and for accumulating flow data, while ordinary accumulators do not provide such functionality.
I tell you, it definitely isn’t zero!
It usually exists, but the data is inaccurate. I’ve encountered vortex flow meters that are designed for use in both directions on a single tube; when used in the reverse direction, the readings are 0
Flow rates measured by differential pressure transmitters in metal near-rotor flowmeters, orifice plates, etc., have no flow indication, nor do they exhibit so-called negative values.
Which flow meters can allow the medium to flow in reverse during device purging?
For differential pressure type meters, there may be no flow measurement or a negative value. With rotor or mechanical flow meters, there is less contact, so it’s hard to say. For electromagnetic types, which can measure flow in both directions, I’ve tried them; when the fluid flows in the reverse direction, the parameters need to be set to operate in reverse mode. Flow measurement is possible, but it’s not always accurate