Characteristics, selection and application of gasoline flow meter

Abstract: The characteristics, selection and application information of gasoline flowmeters are provided by excellent flowmeter and flowmeter manufacturers. 1 Introduction Flow rate, like temperature, liquid level, pressure and other parameters, is an important parameter that needs to be monitored at any time in the chemical production process. There are many methods of flow measurement. For different media conditions, electromagnetic flowmeters, vortex flowmeters, and differential pressure flow can be selected. More flowmeter manufacturers select models and price quotations. You are welcome to inquire. The following are the characteristics, selection and application details of gasoline flowmeters. 1 Introduction Flow rate, like temperature, liquid level, pressure and other parameters, is an important parameter that needs to be monitored at any time in the chemical production process. There are many methods of flow measurement. For different medium working conditions, different types of flowmeters such as electromagnetic flowmeters, vortex flowmeters, differential pressure flowmeters, and gasoline flowmeters can be selected. In the case of raw materials, intermediate products or products (finished products) involving process assessment and/or cost accounting, the accuracy of flow measurement has a great impact on the assessment or accounting results, and it is necessary to select a higher-precision flow meter to complete the task of flow measurement. At this point, the gasoline flow meter shows great advantages and is the preferred target. This paper briefly introduces the measurement principle, performance characteristics, selection and application of gasoline flowmeter. 2. Measurement principle of gasoline flowmeter At present, most gasoline flowmeters measure the mass flow of fluid based on the principle of Coriolis force. Coriolis force refers to the force on an object when it moves in a straight line in a rotating system: Fc=2*Δm(v*ω) In the formula, Fc is the Coriolis force; Δm is the mass of the moving object; ω is the angular velocity; v is the radial velocity during rotation or vibration. It can be seen that the Coriolis force is proportional to the mass Δm and the velocity v of the moving fluid, that is, proportional to the mass flow of the fluid, and has nothing to do with the fluid temperature, pressure, viscosity, and flow characteristics. The constant angular velocity ω in the formula can be replaced by the vibration of the measuring tube of the flowmeter. When the fluid flows through two parallel (or other forms) measuring tubes, the measuring tube is subjected to the action of Coriolis force to produce reverse vibration. The Coriolis force generated in the measuring tube will cause the deformation of the measuring tube, resulting in a phase difference between the inlet and the outlet, and the vibration phase of the measuring tube can be measured through the phase sensors at the inlet and outlet. 3 Classification and characteristics of gasoline flow meters There are many manufacturers of gasoline flow meters. There are well-known companies such as Emerson Process Management Micro-motion, Endress+Hauser, Foxboro, Cologne, etc. abroad, and there are also domestic manufacturers such as Beijing Jianzhong and Capital Technology Group. According to the different output signals of the instrument, it is divided into 4~20mADCART conventional signal, FF fieldbus digital signal, ProfiBus fieldbus digital signal, etc. Some gasoline flowmeters also have pulse signal output and alarm contact output; according to different installation forms, there are split type And integrated type; according to the structure of the measuring mechanism, there are single straight tube, continuous single tube, ω tube, etc.; according to the different measurement media, it can be divided into gas gasoline flowmeter and liquid gasoline flowmeter. The following takes Micro-motion products as an example to briefly explain the characteristics and selection of gasoline flowmeters. Micro-motion gasoline flowmeter mainly has several specifications such as E, F, D, R, H and T types. Among them, the E type has strong anti-interference ability, wide application range and the highest precision, liquid medium is 0.1 level, gas medium is 0.35 level, and can be used for raw material metering, trade metering and other occasions with high precision requirements. Type F liquid medium is grade 0.2 and gas medium is grade 0.5, suitable for general occasions. D type is a gasoline flowmeter selected for special purpose occasions. The sensor not only has wetted parts such as tantalum and Tefzel, but also options such as high temperature and high pressure. The flow range of DS600 can reach 680t/h, which is the flowmeter with the largest measuring range in the Micro-motion flowmeter family. The R-type gasoline flowmeter is an integrated flowmeter with a measurement accuracy of 0.5 for liquid media. Although the accuracy is not too high, and its wetted material is only stainless steel, it is still favored by users because of its convenient installation, economy and reliability. generally accepted. Type H and Type T are hygienic gasoline flow meters, which are made of stainless steel and titanium, and can meet the special surface treatment requirements of the hygienic food industry. The product characteristics of other manufacturers are different, and the most cost-effective gasoline flowmeter can be selected according to different application occasions and accuracy requirements. However, it should be noted that the appropriate flowmeter diameter should be selected according to the measured flow value, so that the flow range of the selected flowmeter is between 20% and 80% of the rated flow range of the flowmeter.

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