Flowmeter orifice plate issues
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For differential pressure transmitters, when the range changes but the medium remains the same, is it necessary to replace the orifice plate? If the capacity is changed from 100 t/h to 120 t/h
There is no need to replace the orifice plate. If high precision is required, the manufacturer can recalculate or calibrate it to determine a new maximum differential pressure value (the differential pressure corresponding to the maximum flow rate, which is also the range of the transmitter). If high precision is not necessary, the conversion can be carried out using the following formula (the principle being that the instrument coefficient remains unchanged): ΔP2max=ΔP1max*Q2max*Q2max/Q1max/Q1max