How to clean and isolate the orifice flow meter

Abstract: The information on how to clean and isolate the orifice flowmeter is provided by the excellent flowmeter and flowmeter manufacturers. The orifice flowmeter is a differential pressure generating device that uses an orifice to cooperate with various differential pressure gauges or differential pressure transmitters to measure flow. It can measure the flow of liquid, steam and gas. If you want to ensure that the orifice flowmeter can work normally operation, usually within a period of time. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the article details on how to clean and isolate the orifice flowmeter. The orifice flowmeter is a differential pressure generating device that uses an orifice to cooperate with various differential pressure gauges or differential pressure transmitters to measure flow. It can measure the flow of liquid, steam and gas. If you want to ensure that the orifice flowmeter can work normally The orifice flowmeter is usually isolated and purged after a period of time. The isolation of the orifice flowmeter is to use the isolation liquid, and the isolation diaphragm type measured medium will not be in direct contact with the flowmeter components, which can protect the orifice flowmeter and achieve measurement. For the measured liquid and corrosive gas with high viscosity, corrosion, and easy to produce solids, an isolator should be used, so that the measured fluid will not be in direct contact with the differential pressure gauge or differential pressure transmitter, so as to avoid The differential pressure transmitter or differential pressure device is damaged. Purge is to use air blowing or flushing liquid so that the measured medium will not be in direct contact with the flowmeter components and the measurement relationship. It is a method to protect the measuring instrument and implement the measurement. Blowing gas is continuously and quantitatively blown into the gas through the measuring pipeline to the measuring object, and flushing is continuously and quantitatively flushing the liquid into the measuring object through the measuring pipeline. The purpose between the two is to make the measured medium not in direct contact with the instrument components, which can achieve the purpose of protecting the orifice flowmeter to achieve the measurement. When the orifice flowmeter measures gas steam, its medium must be cooled before it can come into contact with the secondary instrument and the pressure transmitter. When the orifice flowmeter is responsible for the high temperature of the steam, the transmitter will not work or even be damaged. The transmitter is the motherboard. In order to avoid the influence of high temperature medium on the differential pressure gauge, when measuring steam and water with a temperature greater than 70 °C, a condenser needs to be installed in the pressure guiding line. The function of the condenser is to condense the measured steam in the pressure guiding pipe, and make the condensate liquid level in the positive and negative pressure pipes have the same height and keep it constant. For corrosive media, the material of the measuring orifice flowmeter cannot meet the requirements of corrosion resistance. In order to protect the flowmeter, isolation can be used. For relatively viscous media, media containing solids, toxic media or at ambient temperature Media that may vaporize, condense, crystallize, and precipitate may also be isolated in order to enable accurate measurements. In the application range of purging is limited to the measurement of liquid level, pressure and flow of corrosive, viscous, crystalline and precipitating media, and it is difficult to meet the requirements by means of isolation. It is suitable to use the purging method to carry out the measurement. The orifice flowmeter is a differential pressure generating device for measuring the flowmeter. It is equipped with various differential pressure gauges or differential pressure transmitters to measure the flow of various fluids in the pipeline. The measurement accuracy is closely related to the differential pressure value. . When selecting the differential pressure value, it is generally necessary to select the differential pressure value corresponding to the maximum flow rate. When the differential pressure value of the orifice plate flowmeter increases, the minimum straight pipe section is required to be shorter. For the differential pressure transmitter, a large differential pressure is more stable than a small differential pressure. When the differential pressure value increases,βIf the value becomes smaller, the minimum Reynolds number can be recommended, and the actual Reynolds number may be larger than the recommended Reynolds number. When the flow coefficient is stable, the measurement accuracy will be improved. These factors may affect the repeatability of the orifice flowmeter. The repeatability is determined by the principle of the flowmeter itself and the manufacturing quality, and is an important indicator in the use of the entire process control. In addition to the repeatability, the accuracy is also related to the value calibration system. In actual use, the excellent repeatability of the orifice flowmeter is affected by many factors, such as changes in the viscosity and density of the fluid. The interference will lead to the accuracy of the measurement. This effect is more pronounced if the flowmeter output characteristic is non-linear. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'How to clean and isolate the orifice flow meter'

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