Most common flow meters have one-way flow, that is, the direction of fluid flow has been set during manufacturing.
Most common flow meters have one-way flow, that is, the direction of fluid flow has been set during manufacturing. An exception is the balanced flow meter, which can measure bidirectional flow. The so-called "bidirectional flow measurement" refers to using the same set of flow meters to measure the flow rate of the measured medium during forward and reverse flow.
Balanced flow meters are suitable for most gases, fluids and steam. This bidirectional flow function comes in handy when gas storage tanks are needed for peak shaving in underground gas storage and other places.
How to implement bidirectional flow depends on its structure. There is a porous orifice plate in the middle of the sensor of the balance flow meter. The pressure difference measurement is achieved by changing the cross-sectional area through which the fluid flows. The sensor is basically symmetrical around the orifice plate, so it is not surprising that bidirectional flow is achieved.
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