Vortex flowmeter Falanka mounted meter head no display

Overview.

LUGB series vortex flow meter, is a velocity flow meter, mainly used for industrial pipeline fluid medium flow measurement, such as gas, liquid, steam and a variety of media measurement.

It is characterized by small pressure loss, a large range, high accuracy, in measuring the volume flow of working conditions almost independent of fluid density, pressure, temperature, viscosity and other parameters. No movable mechanical parts, so high reliability, low maintenance, instrument constants can be long-term stability. Among them, the insertion type vortex flowmeter, in the large pipeline welded base, and with the installation of ball valves, can be loaded and unloaded in a constant flow, so as to facilitate operation in dirty media and regular cleaning and maintenance.

The meter adopts piezoelectric stress sensor, can be used for a long time in the working temperature range of -20 ℃ to +300 ℃, widely used in petroleum, chemical, metallurgical, pharmaceutical, water treatment and other industries in the field of flow measurement and measurement and control work. The output of this instrument, with analog standard signal, also has a digital pulse signal output, easy to use with computers and other digital systems, is a more advanced, ideal flow meter.

◆Product implementation standard: JB/T9249-2015 (industry standard)

◆General flange standard: GB/T9119-2010 (national standard)

◆Type approval certificate: 2010F450-33 2006F414-33

Working principle.

When a columnar resistance body is inserted vertically in the fluid, vortices will be generated alternately on both sides of it, with the fluid moving in the downstream direction, called Carman vortex street, see the figure below. The resistance body that generates the vortex street is called the vortex generator. Experimentally, it is proved that the frequency of vortex is proportional to the flow velocity, which can be expressed by the following equation：

Experimentally proven: when the distance h between two columns of vortices and the distance L between two vortices in the same column meet the formula h/L = 0.281, the asymmetric vortex column can maintain a stable state. When the fluid Reynolds number Re in the range of 5000-150000, Sr is basically unchanged, so when the vortex generator column width d and Strohal number Sr for a fixed value of the vortex generator frequency transmission fluid is proportional to the average flow rate, that is, proportional to the flow Q and pressure, temperature, density and other parameters are not relevant.

When the vortex is generated on both sides of the column, the sensor is subject to the effect of alternating lift force perpendicular to the direction of flow induction signal, the frequency of change of the lift force is the vortex frequency, the sensor will send the signal to the converter to amplify and shape the pulse signal with the flow rate is linearly proportional to the direct output or will be converted into a 4 ~ 20mA standard signal output, the relationship between flow Q and frequency is as follows：

塑管流量计规格产品选用进口扩散硅压力光敏电阻器，是扩散硅精密模具加工、温度补偿、模拟信号分析技术的结晶，经过长期老化及稳定性挑选，产品性能稳定可靠。法兰平膜压力变送器以规范法兰盘为标准接口，可实现客户现场的法兰安装方法。主体工艺材料完善，密封干固与外界彻底隔离，能满足防潮、防潮、防爆等恶劣工况规定，该系列产品广泛运用于工业过程管理、原油、化工、冶金等领域。产品特性：

一，供应量降至最小-全部变送器的电子邮箱，现场数显仪表和机壳都是通用的，能够互相更换，因此配件很小。

二，精度极高一般来说，压力变送器的基本准确度均为0.1%，因此肯定智能流量积算仪的准确度为±0.2%，在进行可正负零点转移之后，硅微电涡流传感器依然能维持这一准确度则不必须开展额外调节。