Verification of Vortex Flow Meter by Bell Jar Method

Abstract: Using the bell jar method to verify the vortex flow meter information is provided by the excellent flow meter and flow meter manufacturers and quotation manufacturers. Vortex flowmeter verification methods include standard table method and bell jar method. Due to the open container shaped like a bell jar, it is poured into an upper open cylindrical liquid storage tank containing a sealed liquid (water or other liquid). The bell is floating in a sealed liquid, and the volume inside the bell is known. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the article on the use of the bell jar method to verify the vortex flowmeter. Vortex flowmeter verification methods include standard table method and bell jar method. Due to the open container shaped like a bell jar, it is poured into an upper open cylindrical liquid storage tank containing a sealed liquid (water or other liquid). The bell jar is floating in a sealed liquid, and the volume inside the bell jar is known. During the measurement time interval, the gas flow rate can be obtained by measuring the volume of gas inhaled (or discharged) when the bell jar rises (or falls). The bell jar method device is a volumetric gas flow meter device. The bell method can only be used for air flow meters that measure near atmospheric pressure. Gas meters and wet gas flowmeters are often calibrated by this method, and the flow range is small, and the flowmeter with an upper flow rate of (3000-5000) m3/h can be calibrated. The accuracy of the device is 0.2%~0.5%. When using the bell jar method to verify the vortex flowmeter, two verification methods can be used: the intake method or the discharge method. The working pressure of the air intake method is higher than the residual pressure of the bell, and the flow rate is large. The working pressure of the exhaust method is generally less than the residual pressure of the bell, and the flow rate is small. The bell has a water seal and an oil seal. For a water-sealed bell, if the flowmeter is checked by means of exhaust, the temperature of the flowmeter to be checked is lower than the temperature of the water in the bell, and the water vapor in the air must be considered. errors caused by exposure. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Using the bell jar method to verify the vortex flowmeter'

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