Scale vortex street flowmeter and the turbine meter scale of comparison?

Abstract: the comparison of scale vortex street flowmeter and the turbine meter scale? Information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Vortex flowmeter is mainly used for industrial piping medium fluid flow measurement, such as gas, liquid and vapor, and other media. Is characterized by small pressure loss, wide range, high precision, working condition of the measurement volume flow is almost not affected by the fluid density, pressure, temperature,. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a scale vortex street flowmeter and the turbine meter scale of comparison? The article details. Vortex flowmeter is mainly used for industrial piping medium fluid flow measurement, such as gas, liquid and vapor, and other media. Is characterized by small pressure loss, wide range, high precision, working condition of the measurement volume flow is almost not affected by the fluid density, the influence of the parameters such as pressure, temperature, viscosity. No moving mechanical parts, so high reliability, small amount of maintenance. Instrument parameters can be long-term stability. Vortex street flowmeter using piezoelectric stress sensor, high reliability, can be in - Working temperature of 20 ℃ ~ + 250 ℃ within the scope of work. There are standard signal simulation and digital pulse signal output, easy with the computer and digital systems, is a more advanced, the ideal measuring instrument. Working principle of the two, the two different detection methods are different, and structure is not the same! Volume flowmeter is simple, turbine flowmeter, the impulse current generated by the magnetic flux changes, vortex flowmeter is measured by detecting frequency flow; So we usually more common is liquid turbine flow meter, etc. Vortex flowmeter can be used for almost everything can form vortex column occasions, not only can be used in a closed pipe, also can be used to open groove, compared with the turbine flowmeter, vortex flowmeter without moving mechanical parts, maintenance workload small, instrument constant stability. 1, good repeatability, short-term repeatability can reach 0. 05% - 0. 2%, it is because of good repeatability, such as the current calibration or online calibration can get high accuracy, flow meter in trade settlement is preferable. 2, high accuracy, for the liquid is commonly & plusmn; 0. 25% - ± 0. Type 5%, high precision can reach & plusmn; 0. 15%; And medium is gas, typically & plusmn; 1% - ± 1. 5%, special special & plusmn; 0. 5% - ± 1%. Of (among) all the flowmeter, it belongs to zui accurate. Total 3, the output pulse frequency signal, and is suitable for metering and connected to the computer, no zero drift, strong anti-jamming capability. 4, turbine flow meter is not suitable for high viscosity medium, with the increase of viscosity, flow meter measuring lower limit value, degree of narrowing the scope, the linearity of variation. 5, fluid property ( The density, viscosity) Have great influence on characteristics of instrument. Gas meter is affected by the density and liquid flow meter is sensitive to viscosity change reaction. Due to the density and viscosity and closely related to temperature, pressure, temperature, pressure fluctuation is inevitable at the scene, according to a variety of fluid physical properties to the degree of influence on the precision compensation measures, liquid to targeted with turbine flowmeter, should use the corresponding gas turbine flowmeter, so as to maintain a high measuring accuracy. 6, the purity of the medium to be measured the demand is higher, limiting its application fields, although can be installed filter medium so as to adapt to the dirt, but also leads to loss of pressure increase, such as maintenance quantity increase side effects. Turbine flowmeter in overseas oil products accounted for 70% ~ 80% of the measurement, the calibration flow more use at home, just make sure clean, medium and check regularly, can achieve other flowmeter is difficult to achieve the accuracy of the turbine flowmeter. Vortex street have small flow dead zone, measuring range is bigger than without the turbine, the precision accuracy to the highest point of the turbine can do, but turbine moving blade wheel in turn, in the long run bearing wear can affect the accuracy of measurement, often should adjust coefficient. In addition, the frequency should be occasions, turbine flowmeter of vortex flowmeters are not commonly used. ； The precision of the turbine flowmeter is higher, often used in measuring, vortex street flowmeter flow measurement can be used commonly; The accuracy of the vortex street flowmeter for liquid in roughly & plusmn; 0. 5%R~± R, 2% for gas in & plusmn; l % R ~± R 2%, repeatability is commonly 0. 2% ~ 0. 5%. Due to the vortex street flowmeter VSF instrument coefficient is low, the frequency resolution is low, less the greater the diameter, the meter diameter shoulds not be too big. Wide range of degrees is the characteristic of VSF, but the important thing is that how many minimum flow for. Generally mean velocity of liquid limit of 0. 5 m/s, gas is 4 ~ 5 m/s. The normal flow VSF zui 1/2 ~ 2/3 in the normal range. VSF from measuring instrument coefficient of dielectric property and the effect of this is a big advantage, can use a kind of typical medium calibration and application to other media, provide convenience for solving the problem of calibration equipment.

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