When the fluid comes out of the orifice plate’s opening, it’s cross-section is minimum and uniform for a particular distance and then the cross-section of the fluid starts diverging in the downstream. The fluid having a uniform cross-section of flow converges into the orifice plate’s opening in its upstream.The detail of the fluid movement inside the pipe and orifice plate has to be understood.Want to know more about the applications of differential pressure transmitters? Variables in orifice plate flow measurement This pressure drop is measured using a differential pressure transmitter and can be used to calculate the flow rate. When an orifice plate is placed in a pipe carrying the fluid whose rate of flow is to be measured, the orifice plate causes a pressure drop which varies with the flow rate. The working principle of orifice plate flow meters Then we have to calculate the flow range of the orifice plate. Usually, when setting up a differential pressure transmitter, we need to decide what variable the device will measure, such as flow, level, volume, mass, and others.
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