Errors and Correction Causes of Orifice Flow Meters

Abstract: The information on the error and correction reasons of the orifice flowmeter is provided by the excellent flowmeter and flowmeter manufacturers. During the use stage of the orifice flowmeter, its process pipeline needs to be purged many times, and the orifice flowmeter must be disassembled and installed frequently. If the size of the orifice is the same, there will be errors if you are not careful, and the normal phenomenon will occur when the orifice flowmeter is replaced. on the orifice flowmeter. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following are the details of the error and correction reasons for the orifice flowmeter. During the use stage of the orifice flowmeter, the process pipeline needs to be purged several times, and the orifice flowmeter must be disassembled and installed frequently. If the size of the orifice is the same, there will be errors if you are not careful, and the normal phenomenon will occur when the orifice flowmeter is replaced. The upstream and downstream surfaces of the orifice flowmeter are installed reversely. During installation, the flow direction of the medium in the pipeline and the direction of the orifice flowmeter must be determined, otherwise the measured value will be low. It is caused by carelessness. When installing the orifice plate, make sure that the orifice plate flowmeter is marked with“+”The face is on the upstream side of the flow direction. The main function of the pressure-guiding pipeline is to transmit the differential pressure signal generated by the orifice flowmeter. The length of the pressure-guiding pipe should be between 3 and 20 meters. If the pressure-guiding pipe is too short, the flowmeter's Fluctuations in the flow measurement will become larger; if it is too long, measurement hysteresis will occur. In the industrial production process, most of the gas measurements are matched with standard throttle orifice flowmeters and differential pressure transmitters. Although the accuracy of differential pressure transmitters can reach up to 0.075, due to various reasons , the measurement error is also very large, when the differential pressure transmitter is used in industrial measurement, this problem will be more obvious. Therefore, it is of great significance to find the reasons for the measurement errors and the methods to overcome them. The orifice flowmeter is mainly composed of a pressure guiding tube, an orifice, and a differential pressure transmitter. The throttling device element will convert the flow of the medium into differential pressure, and the differential pressure is transmitted to the positive and negative pressure chambers of the differential pressure transmitter diaphragm through the pressure guiding pipeline. The filling fluid transmits the differential pressure to the measuring diaphragm, which can offset the measuring diaphragm left and right. The upstream and downstream surfaces of the orifice flowmeter will be damaged or the orifice flange gasket will protrude into the pipeline. During the transportation of the orifice flowmeter or during the installation of the flowmeter by the construction personnel, the upstream and downstream surfaces will be damaged or damaged. It is the flange pad protruding from the pipeline, which will cause the flowmeter to have measurement errors. The construction personnel should carefully check the orifice plate before installing the orifice plate flowmeter. If the upstream and downstream surfaces of the orifice plate are found to be damaged, they should replace it in time. The design of the standard orifice flowmeter is obtained through a large number of experiments. It can be used directly without actual calibration. The orifice flowmeter may be irregular or even wrong during the installation process, which will lead to flow generation of measurement errors. The front and rear straight pipe sections of the orifice plate flowmeter do not meet the requirements. The front and rear straight pipe sections are to ensure the stable flow of the fluid in the pipeline, but because there are often bifurcations, turns and other resistance parts on the process pipeline, the fluid will be stable due to The phenomenon becomes disturbance, which leads to the error of its measurement. The installation position of the throttling device can be reasonably designed by using the front and rear straight pipe sections. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Errors and Correction Causes of Orifice Flow Meters'

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