How to calculate the flow range of a quadratic meter
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Knowing that the differential pressure range of the orifice plate differential pressure flow meter is 0–50 KPa, how can the flow range of the secondary meter be calculated as 0–? m3/h
The magnitude of the differential pressure is proportional to the square of the flow rate; it is not possible to calculate it merely by knowing the differential pressure, as the flow coefficient K is required for that. However, it is possible to know the corresponding relationship of the traffic. For example, if the flow rate is 0–400 m3/h, then when the differential pressure is 0 KP, it corresponds to 0 m3/h ； If the differential pressure is 12.5 KP, then the flow rate is 200 m3/h, and so on
How is the K flow coefficient calculated, or can it be found in available literature?
Based on the conditions you provided, it’s simply impossible to calculate it
The data you provided cannot be used to calculate the traffic. Each orifice plate must come with an orifice plate calculation sheet (Throttling Device Calculation Sheet GB/T 2624-93). You should check this calculation sheet.
The flow range of the secondary meter is determined during the orifice plate calculation; please refer to GBT 2624.2-2006 \"Measurement of fluid flow rate in fully filled pipes using differential pressure devices installed in circular cross-section pipes – Part 2: Orifice plates\"