Consult regarding the selection of flowmeters
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CO2 gas with a 85% concentration at 0.3 MPa, or compressed air at 0.3 MPa – after compression, the gas passes through a gas-liquid separator; as a result, it contains a certain amount of moisture. When this gas flows through vertical pipes, it is necessary to measure its flow rate. Which type of flow meter would be more suitable in this case?
For gases containing a certain amount of moisture, vortex flowmeters or magnetic flowmeters can be considered. Because they can better adapt to flow measurement in a liquid-gas mixture state, and are not easily affected by moisture. For compressed air at 0.3 MPa, these two types of flow meters can also be considered. It should be noted, however, that CO2 gas has a relatively high density; if a vortex flow meter is used, a model with higher precision must be selected based on the actual conditions to ensure accurate measurement. At the same time, it is also necessary to select the appropriate specification and model based on the specific shape of the pipeline and the flow rate range. .
We previously used vortex flowmeters, and later switched to orifice flowmeters; the readings were still not very accurate (when the valve was fully closed, the flow rate indicated one or two thousand). Can magnetic flowmeters be used to measure gases?