Judgment of good and bad gas flowmeter

The accuracy of judging whether the gas flowmeter is good or bad is the standard for judging whether the instrument is good or bad, but if the product quality is excellent, but the result is not accurate, at this time, it is necessary to think about whether it has been affected during the test! First of all, you must choose a qualified manufacturer to purchase. After more than 30 years of accumulation, Changzhou Chengfeng is equipped with a professional R&D team and large-scale gas calibration equipment. It is your best choice. Error 1: Unreasonable pipeline design Gas flowmeter is a commonly used gas measuring instrument, which mainly measures gas, air, nitrogen, hydrogen, etc. 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-pipe network is also using gas, the manual valve is opened. Since the gas in the main pipeline is partly diverted from the sub-pipe, the air pressure in the main pipeline will drop, so that the pressure in front of the flowmeter is lower than the pressure behind the meter. The flow meter is reversed, causing double metering. To avoid this situation, a one-way valve must be installed in front of the No. 1 flowmeter. Error 2: High pressure and low pressure do not distinguish between high pressure and low pressure metering. If the meter is installed on the high-pressure pipeline, and the pressure is adjusted by the pressure regulator, the user uses gas on the low-pressure pipeline. When the gas consumption of the low-pressure pipeline is not large, according to the gas state equation, when the temperature is similar, The small flow rate of the low-pressure pipeline will be even smaller when calculated back to the flow rate of the high-pressure pipeline, which may not reach the initial flow rate of the flowmeter. The flow meter does not count. Error 3: Improper installation The correct installation method of the gas flowmeter will help improve the measurement accuracy and prolong the service life. When the flowmeter is installed on the pipeline, it should be ensured that the threaded hole on the flowmeter body is aligned with the screw hole of the pipe flange 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. The flow meter is 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 rotor being impacted and deformed by the gas due to the air hammer effect, causing the flowmeter to be stuck.

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