The following problems should be paid attention to in the use of gas waist wheel flowmeter

The following problems should be paid attention to in the use of gas waist wheel flowmeter&.In order to prevent jamming and blockage, a filter with an appropriate mesh size should be installed in front of the flowmeter, and attention should be paid to sewage discharge, inspection and cleaning of the filter screen. ^The instrument should be bypassed before it is put into operation, and ensure that there is no welding slag and other garbage in the pipe section before the instrument and after the filter. The operation steps are the same as the gas turbine flowmeter described above. Prevent the waist wheel from running under overspeed conditions. . Liquid accumulation in the metering cavity should be prevented. For this reason, the instrument should be installed vertically, and the flowmeter should be higher than the process pipeline so that the liquid accumulation can be discharged regularly. When there is a problem with the operation of the positive displacement flowmeter, the pressure difference between the upstream and downstream may change accordingly, so the maintenance personnel should always pay attention to observe the pressure difference, so as to make a judgment on whether the fault exists. The steam for flushing the pipeline is forbidden to pass through the flowmeter. I regularly remove, wash, maintain and lubricate. The disadvantage of positive displacement flowmeter is that it is noisy when rotating at high speed. Once the rotating part is stuck by garbage, it will affect the supply of natural gas. Another special feature of it is the pressure-reducing pulsation. According to the measurement principle, small pressure pulsations are produced when the waist wheel turns. Under normal circumstances, this pulsation has no effect on its own measurement, but it may affect the accuracy of the standard flowmeter when the standard meter is connected in series with the waist wheel flowmeter for calibration.

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