Vortex flow meter scale correct installation to reduce use of wear and tear

Abstract: the scale vortex flowmeter reduce loss information using the correct installation produced by excellent flow meter, flow meter manufacturer to offer you the quotation. 1, the vortex street flowmeter can only one-way measurement, pay attention to when installation to ensure medium flow direction and flow direction of the arrow shown in the paper. 2. Ideal vortex flowmeter installation method for vertical installation, medium from bottom to top through the flowmeter, the flow meter installed in a vertical. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a vortex flow meter scale to reduce loss of use of the article details correct installation. 1, the vortex street flowmeter can only one-way measurement, pay attention to when installation to ensure medium flow direction and flow direction of the arrow shown in the paper. 2. Ideal vortex flowmeter installation method for vertical installation, medium from bottom to top through the flowmeter, the flow meter installed in vertical pipe runs, from bottom to top direction of flow. 3. When mounted horizontally, flow meter must be installed in the high of the whole system, and ensure outlet pressure. Do not install in pipeline zui high, because of zui highs tend to gas accumulation, the pipe is not full, export direct vent. 4. When measuring high temperature fluid, used in a vertical installations as far as possible. If have to horizontal installation, please send the flow transmitter partial vertical downward, or horizontal lateral loading, avoid high temperature. And pay attention to the installation location of air flow and ventilation is good. 5. The upstream and downstream side of the vortex flow sensor should have a long straight pipe, length varies according to the pipeline condition, the sensor should try to avoid installed upstream regulator or partially open the valve, to install the valve case, indeed upstream diameter of straight pipe should be not less than 50 d, etc, should be not less than 5 d downstream straight pipe section. 6. When installation, pay attention to the pipe size should be slightly bigger than or equal to the inner diameter of the instrument. 7. Use of sealing ring, pay attention to the sealing ring inside diameter should be slightly greater than or equal to the inner diameter of the instrument, sealing ring center located in the heart of the pipeline. 8. Instrument electrical connections, must pay attention to the line hole sealing. Must choose according to meter cable entry model corresponding sealing interface, and properly, closely installation. There is no seal joint, or careless, short of sealing effect, is one of the instrument zui common cause of damage. Vortex flowmeter can during the installation process variable diameter? How to do the installation of variable diameter pipe? We detailed introduce below: first, it should be pointed out that the traditional variable diameter tube can after reducing, and relatively small diameter flowmeter to achieve the purpose of measuring small flow rate, but this approach may expand the range than, don't because it and change the velocity distribution of the pipeline at the end of the state. As we know, vortex flowmeter is based on the theory and in the infinite uniform flow field, and in the actual, in a closed circular tube, but is a uniform flow cross sectional velocity distribution is a paraboloid, while selecting rational column type, make the cylinder on both sides of the bow surface velocity distribution uniformity, but in fact, process piping paraboloid of the influence of velocity distribution on is objective existence. Experiments show that the bigger of the traffic, the less affected, or say the influence in allowed range; However, as the decline in traffic, the influence is more and more big, from a large number of calibration data, always with the decrease of the flow meter constant increases. This suggests that the sampling point of velocity and the average flow velocity difference is bigger and bigger. Variable diameter is adopted after the rectifier, as a result of shrinkage in a gradual increase in the cross section of flow velocity, at various points on the section of the increase of flow velocity is different, near the center of the velocity increase is small, and large velocity increases near the throat diameter edge. Traditional fluid rectifier through long-term research and practice have been mature, it usually adopts block body separation flow to adjust the velocity distribution of pipe, in order to achieve the purpose of the rectifier. This type of rectifier and flow calibration system is mainly used in laboratory. But this method is easy to cause contamination jams and increase the resistance loss, so rarely used in industrial pipeline. Because of its unique performance, the vortex street flowmeter has been much attention, and in a wide range of applications, but there are still people is plagued by the following two aspects of problems: *, one of the main characteristics of vortex flowmeter is a wide range, generally around 10:1, it should be said that such a wide measuring range should be more excellent performance, but in the practical industrial application, the upper limit of zui large flow rate is far lower than the instrument, zui small flow and tend to be lower than the lower limit value, some instrument often work near the lower limit of flow, resulting in decreased instrument measuring accuracy, the signal is weak at this moment, the anti-interference ability of the instrument are also falling. Second, because of interference instrument upstream piping of choke, the distortion flow field, affect the normal dial from vortex. In order to overcome the flow field disturbance, the instrument need to be equipped with a long straight pipe before ( Usually is 15 ~ 40 times the length of the pipe inner process) And it is hard to meet at the scene of the actual. In order to measure small flow rate, people tend to use inner cavity shape for garden of traditional variable diameter tube, after reducing increase of flow velocity measurement. Vortex street flowmeter work within the scope of the normal velocity, but the way of variable diameter and structure size large ( General length for the technology of 3 ~ 5 times the pipe diameter ，

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