Flow issues with the flow meter
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This post was last edited by sxf1028102800 on 2018-4-18 at 20:39. There is a flow meter on the nitrogen pipeline, and the reading is 63.83. Is this the flow rate? Look, there’s also kpR shown below. By the way, what does KPR mean?
It’s not flow rate; this is the differential pressure value of a differential pressure transmitter. In differential pressure flow meters such as orifice plates and nozzles, the flow rate is proportional to the square root of the differential pressure.
kPa is a unit of pressure: kilopascals.
The displayed value is pressure, usually the differential pressure of the throttling element; it needs to be squared in the control panel or gauge
It’s not flow rate; this is the differential pressure value of a differential pressure transmitter. In differential pressure flow meters such as orifice plates and nozzles, the flow rate is proportional to the square root of the differential pressure. Most comprehensive reply
It is displayed as a differential pressure value. Due to the characteristics of flow meters such as orifice plates and Venturi tubes, there is a proportional relationship between differential pressure and flow rate. Therefore, if this transmitter serves as the display for a flow meter, then there must be a corresponding card in the control cabinet to receive the signal; appropriate programs are then used in the distributed control system, and the front-end program displays the corresponding flow rate. KPR actually stands for kPa; it is shown as KPR due to the limitations of the LCD screen, where KPR means kilopascal, i.e., pressure
In the picture is a Rosemount differential pressure transmitter, which can be used in conjunction with Rosemount Analytical instruments, or orifice plates, or throttling elements from other brands. Combined together, it is called a differential pressure flow meter, which operates on the principle of differential pressure. The value displayed in the table header is the differential pressure in kPa, not kPR; kPa is the unit of pressure. The system obtains the differential pressure value and then calculates the flow rate separately
This is the differential pressure value of the differential pressure transmitter. Current flow rate = Square root of (current differential pressure value/differential pressure limit) * flow rate limit