The characteristics of the gas flow meter scale, selection and application

Abstract: the characteristics of the gas flow meter scale, selection and application of information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. 1 introduction parameters such as flow rate and temperature, liquid level, pressure, is a need to monitor at any time in the process of chemical production of some important parameters. Many flow measurement methods, according to different working condition of medium, can choose the electromagnetic flowmeter, vortex flowmeter, differential pressure flow. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the characteristics of the gas flow meter scale, selection and application of the article details. 1 introduction parameters such as flow rate and temperature, liquid level, pressure, is a need to monitor at any time in the process of chemical production of some important parameters. A lot of flow measurement methods, according to different working condition of medium, can choose the electromagnetic flowmeter, vortex flowmeter, differential pressure flow meter, gas meter, etc. Different kinds of flowmeter. In raw materials, intermediate products or product ( The finished product) Involving technology such as the inspection and/or cost calculation, the accuracy of flow measurement with the result of the inspection or accounting impact is bigger, need to select the high precision flow meters to complete the task of the flow measurement. At this point, the gas flow meter shows great advantage, is the preferred targets. This paper briefly introduces the gas flowmeter measurement principle, characteristics, selection and application. 2 gas flowmeter measurement principle at present, most of the gas flow meter is based on the principle of coriolis force to measure the mass flow rate of the fluid. Coriolis force is to point to objects in the rotation system in a straight line of force: Fc = 2 * & Delta; m( v*ω ) Type of Fc as the coriolis force; Δ M for the quality of the moving object; ω For the angular velocity; V is for rotation or vibration of the radial velocity. Thus, coriolis force and movement of fluid quality & Delta; M, v is proportional to the speed that is proportional to the mass flow of fluid, and fluid temperature, pressure, viscosity and flow characteristics. Type in a constant angular velocity & omega; The flowmeter the vibration of the measuring tube can be used in place of, when the fluid flows through two parallel ( Or other forms) Measuring tube, tube coriolis force produce reverse the effect of vibration. In the measuring tube produced by the coriolis force will cause measuring pipe deformation, imports and exports are produced by phase difference, through the entry and exit phase sensors can measure the vibration of the measuring tube phase. The classification of the three gas flowmeter and characteristics of gas flow meter manufacturers. Abroad have high standards (Emerson process management Micro- 运动) , house Enders, foxboro, cologne, such as well-known companies, domestic also have Beijing chienchung, capital, science and technology group, etc. According to different meter output signal is divided into 4 ~ 20 madchart conventional signal digital signal, and FF fieldbus ProfiBus fieldbus digital signal, such as part of the gas flow meter with pulse signal output, alarm contact output; According to the type of installation is different, there are points in shape and a size; According to different measuring mechanism structure, there is a single straight pipe, continuous single pipe, & omega; Tube, etc. ; According to different measuring medium can be divided into the gas fuel flow meter and liquid gas flowmeter. In a Micro - below Motion products as an example, the characteristics and selection of flowmeter for gasoline do a simple description. Micro- Motion gas flowmeter are D, E, F, R, H and T several other specifications. E of strong anti-jamming capability, wide application range and high precision zui, 0 liquid medium. Gas medium grade 1, 0. 35 level and can be used for raw materials into the gear measurement, trade, requiring higher measuring accuracy. 0 F type liquid medium. Level 2, gas medium 0. Level 5, suitable for general occasions. D type selection of gas flowmeter for special purposes of occasions. Sensor not only has the fluid components, such as tantalum, Tefzel and high temperature, high pressure, such as options, DS600 flow range can reach 680 t/h, is the Micro - Motion flowmeter in the family can zui large measuring range of the flowmeter. R type gas flowmeter is one shape meter, liquid medium measurement accuracy is 0. Level 5, although the accuracy is not high, and its liquid only stainless steel material, but because it has the characteristics of convenient installation and reliable economic, is widely recognized by users. H and T is the health type gas flowmeter, material has stainless steel and titanium material, can satisfy the requirement of the health food industry special surface treatment. Characteristics of products from other manufacturers are different, can choose according to the use of different occasions and accuracy ratio of zui high gas flow meter. But beware, be based on the current value to choose the appropriate flow meter diameter, make the use of selected meter flow range in flow meter between 20% ~ 80% of the rated flow range. The installation of four gas flowmeter gas flowmeter straight pipe before and after the installation of no special requirements. But must meet the following conditions: ( 1) For liquid medium, flowmeter in the pipeline should be brought low. Avoid the low back pressure and make the medium evaporation, affect the measurement result.

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