Two principles should be borne in mind when choosing the precession vortex gas flowmeter selection process: one is to ensure production safety; the other is to ensure the accuracy of the precession swirl gas flowmeter. Three selection parameters must be implemented for this purpose, namely, the maximum, minimum, and common flow rates in the near and far future (mainly used for the nominal diameter of the selected instrument) and the design pressure of the measured medium (mainly used for the nominal pressure of the selected instrument. Grade), actual working pressure (mainly used for the pressure rating of the selected instrument pressure sensor).
1. When it is known that the measured flow rate is the volumetric flow rate of working conditions, the nominal nominal diameter can be selected directly according to the corresponding flow range;
2. When it is known that the measured flow rate is the volumetric flow under standard conditions, the nominal volumetric flow rate QN should be converted to the working volume flow rate Qv, and the corresponding nominal flow path should be selected according to the corresponding flow rate range; When the caliber flowmeter can cover the minimum and maximum volumetric flow rate, the small caliber should be selected as far as pressure loss is allowed;
3. Do not make the actual minimum flow Qmin lower than the lower flow limit of the selected nominal diameter flowmeter;
4. When the flow range and nominal pressure have special requirements, products can be provided according to the site requirements
1. When it is known that the measured flow rate is the volumetric flow rate of working conditions, the nominal nominal diameter can be selected directly according to the corresponding flow range;
2. When it is known that the measured flow rate is the volumetric flow under standard conditions, the nominal volumetric flow rate QN should be converted to the working volume flow rate Qv, and the corresponding nominal flow path should be selected according to the corresponding flow rate range; When the caliber flowmeter can cover the minimum and maximum volumetric flow rate, the small caliber should be selected as far as pressure loss is allowed;
3. Do not make the actual minimum flow Qmin lower than the lower flow limit of the selected nominal diameter flowmeter;
4. When the flow range and nominal pressure have special requirements, products can be provided according to the site requirements
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