The quality of the gas flow meter is judged from multiple angles and multiple aspects

Abstract: The quality of the gas flow meter is judged from multiple angles and multiple aspects. The information is provided by the excellent flow meter and flow meter manufacturers and quotation manufacturers. The quality of the gas flow meter can be partly judged by the manufacturer, but the other part is the accuracy of the final result. Simply put, the ancients said that a good cat is a good cat if it can catch mice regardless of whether it is black or white. So the final result is fine. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the determination of the quality of gas flowmeters. The quality of the gas flow meter can be judged by the manufacturer, but the other part is the accuracy of the final result. Simply put, the ancients said that no matter what“A black cat and a white cat are good cats if they can catch mice”, so the accuracy of the final result is a large proportion of the standard for judging the quality of the instrument, but what I want to say here today is that both from the manufacturer and from the quality are excellent, but the result is not accurate, this time Think carefully about whether it was affected during the test! Error 1: Unreasonable pipeline design It is well known that gas flowmeter is a commonly used gas measuring instrument, mainly for measuring gas, air, nitrogen, acetylene, phosgene, hydrogen, natural gas, nitrogen, liquefied petroleum gas, etc. A common cause of inaccurate results is that unreasonable pipeline design may cause large measurement errors. Two parallel pipelines, when the main network uses gas, the manual valve of the branch network is closed. The gas flow meter measures normally. When the sub-pipeline is also using gas, the manual valve is opened. Since the gas in the main pipeline is divided into part by the sub-pipeline, the air pressure in the main pipeline will drop, so that the pressure before the flow meter is lower than the pressure behind the meter. The flowmeter is reversed, and the flowmeter also accumulates flow, resulting in double metering. To avoid this, a check valve must be installed in front of flow meter 1. Diversified gas flowmeter picture error 2: high pressure and low pressure are not divided. There is a second effect that the measurer will use high pressure to measure low pressure gas. It is to install the metering chamber on the high-pressure pipeline, and then adjust the pressure through the pressure regulator. The gas user uses gas on the low-pressure pipeline. When the gas consumption of the low-pressure pipeline user is not large, according to the gas state equation, the temperature is similar. When the small flow of the low-pressure pipeline is inversely calculated to the high-pressure pipeline, the flow will be smaller, and even this flow cannot reach the starting flow of the flowmeter. The flow meter does not count. Therefore, it will cause a large measurement error. Error 3: Improper installation The correct installation of the gas flowmeter will help improve the measurement accuracy of the flowmeter and prolong its service life. When the flowmeter is installed on the pipeline, it should be ensured that the threaded holes on the flowmeter body and the threaded holes of the pipeline flange are aligned to ensure the parallelism of the flange, avoid the flowmeter from being subjected to other external forces, and prevent the meter body from being deformed by force, so that the Flowmeter stuck. When opening the flowmeter, the front valve should be opened first, and then the rear valve should be opened slowly, so that the gas flowmeter can be started under pressure, so as to avoid the flowmeter being stuck due to the impact deformation of the flowmeter rotor due to the gas hammer effect. The above are the influences of external factors during measurement, and of course their own influences. For example, when the gas flowmeter is made, due to rough parts, assembly accuracy and wear and other reasons, the accuracy of the flowmeter itself is not high or the accuracy is reduced, which makes the measurement The number of products is inaccurate. Therefore, when selecting a flowmeter, one with higher accuracy should be selected. At present, the accuracy of the working flowmeter required in my country is±0.5%, and periodic verification should be carried out according to the regulations in use. This depends on the responsible attitude of the manufacturer, as well as the keen eye of the buyer! The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Determination of the quality of gas flow meter, multi-angle and multi-aspect'

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