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Guangzhou fangshi instruments co., ltd-comparison of lining performance of electromagnetic flowmeterLining materialmain performanceTemperature Media comparisonNatural rubber (soft rubber)Good elasticity, wear resistance and breaking force;Resistant to general weak acid, weak alkali corrosion, hydrochloric acid, acetic acid, oxalic acid under high temperature.80℃~90℃Measuring water and sewageAcid resistant rubber (hard rubber)Ammonia, phosphoric acid and 50% sulfuric acid, sodium hydroxide, potassium hydroxide corrosion, but not resistant to oxidant corrosion-25~+90℃Test general acid, alka...
发布时间: 2019 - 06 - 27
浏览次数:11
Comparison of Two-channel Ultrasonic Wave and Single-channel Ultrasonic WaveAs shown in the figuRe, curve 1 shows the relationship between double correction coefficient k and Reynolds number re, and curve 2 shows the relationship between single correction coefficient k and Reynolds number re.  It can be seen that with the change of Reynolds number, the correction coefficient of a single channel changes, and the correction coefficient k of two channels basically keeps a fixed value, which shows that the double channel ultrasonic flowmeter can ensure the accuracy of measurement under differ...
发布时间: 2019 - 01 - 16
浏览次数:105
Vortex Flowmeter-Saturated Steam Temperature and Pressure Compensation(1) temperature compensation and pressure compensation are used to calculate the consistency of density saturated steam by look-up table method, which is essentially the same.  The reason for this is that the pressure and temperature of saturated steam have a single-value function relationship, and the density found from the steam temperature is consistent with the density found from the pressure corresponding to this temperature.  Therefore, both temperature compensation and pressure compensation are feasible in p...
发布时间: 2019 - 06 - 27
浏览次数:103
Guangzhou fangshi instruments co., ltd-comparison of lining performance of electromagnetic flowmeterLining materialmain performanceTemperature Media comparisonNatural rubber (soft rubber)Good elasticity, wear resistance and breaking force;Resistant to general weak acid, weak base corrosion, hydrochloric acid, acetic acid, oxalic acid under high temperature.80℃~90℃Measure water and sewageAcid resistant rubber (hard rubber)Ammonia, phosphoric acid and 50% sulfuric acid, sodium hydroxide, potassium hydroxide corrosion, but not resistant to oxidant corrosion-25~+90℃Test general acid, alkali a...
发布时间: 2019 - 01 - 16
浏览次数:10
Vortex Flowmeter-Saturated Steam Temperature and Pressure Compensation(1) temperature compensation and pressure compensation are used to calculate the consistency of density saturated steam by look-up table method, which is essentially the same.  The reason for this is that the pressure and temperature of saturated steam have a single-value function relationship, and the density found from the steam temperature is consistent with the density found from the pressure corresponding to this temperature.  Therefore, both temperature compensation and pressure compensation are feasible in p...
发布时间: 2014 - 11 - 15
浏览次数:100
Installation Steps of Electromagnetic Flowmeter1, first calculate the installation size;2. Put the pipe section to be installed on the sawing machine and saw it off, and repair the saw cut.3, the flange set on the pipe, fixed after spot welding first, then the solid welding, check whether to complete better4. Repeat the previous step to weld the flange on the other side5, check whether the installation size meets the requirements6. Move the welded flange pipe to the installation site and weld the pipe to the pipeline.7, install the flowmeter on the pipeline, pay attention to the gasket must be...
发布时间: 2019 - 03 - 19
浏览次数:3
Performance Comparison between Throttle Differential Pressure Flowmeter and Vortex Flowmeter;I. Vortex street flowmeter has the following advantages over throttling differential pressure flowmeter:1. The structure is simple, firm and convenient to install and maintain.  There is no need for a pressure guide pipe, a three-valve set, etc. to reduce leakage, blockage, freezing, etc.2. The accuracy is relatively high, generally (1 ~ 1.5)% r.3. The measuring range is wide, the caliber is reasonably determined, and the range can reach 20:1.4. The pressure loss is small, about 1/4 ~ 1/2 of throt...
发布时间: 2019 - 03 - 19
浏览次数:1
The measurement of the high-precision ultrasonic flowmeter developed and produced by Guangzhou ultrasonic flowmeter manufacturer in Guangdong does not touch liquid at all, and it is not necessary to interrupt the measured process or cut off the pipeline.  The high precision ultrasonic flowmeter has no moving parts, low maintenance cost and long service life.  Large measurable flow range and good long-term stability;  The additional flow resistance to the fluid is extremely low, and the operation energy of industrial system equipment is saved;  This high-precision ultrasonic...
发布时间: 2019 - 03 - 19
浏览次数:2
In recent years, many improvements have been made in the anti-vibration problem of vortex flowmeter by various manufacturing enterprises, and the anti-vibration performance of vortex flowmeter has been significantly improved.Some can withstand 1G acceleration and some can withstand 2G acceleration.Vortex flowmeters using force detection are more sensitive to the vibration of pipelines and environment, especially stress vortex flowmeters, which are more sensitive to vibration than other types of vortex flowmeters.However, for measuring pipelines with strong vibration sources, care should be tak...
发布时间: 2019 - 03 - 19
浏览次数:1
There is no flowmeter in the world that can measure fluid in any medium.  According to the different properties of each fluid, the application of various flow meters is also different.Generally speaking, the best choice for some tested media which are edible or pharmaceutical fluids with hygiene requirements is the external clamp non-contact ultrasonic flowmeter.However, vortex flowmeter is the best choice for some high temperature pipe sections with gas as the medium to be measured.  There are also some small-flow and small-caliber fluids for which the gas mass flowmeter is selected...
发布时间: 2019 - 03 - 19
浏览次数:2
In industrial production and life, in order to ensure the reasonable and safe distribution of water supply load and to provide basic basis for economic accounting, most water supply pipelines are equipped with flow meters for detection.  In the design process, the metering flowmeter is often selected based on the nominal diameter of the pipeline and the average flow rate, which can meet the metering accuracy requirements under normal water supply conditions. However, in the actual operation process, there are various operating conditions, and very large metering errors often occur when th...
发布时间: 2019 - 03 - 19
浏览次数:1
In the process pipelines of many enterprises, there are a large number of phenomena of low actual flow rate or low flow rate of fluid. The existence of this phenomenon is mainly due to the following reasons: first, reducing flow rate can reduce pressure loss in fluid flow, reduce driving power and save energy;  The second is to consider the future development and expand the scale, leaving sufficient margin in the design to make the process pipeline larger.  Third, some pipelines have high working pressure. Although the flow rate is not small, the flow rate is low.  ,The existenc...
发布时间: 2019 - 03 - 19
浏览次数:5
Some troubleshooting (experience) of ultrasonic flowmeter during field application:1. when f: nanm3/h appears on the LCD of the display screenT: Nanm3 is caused by abnormal power-on (loose power cord), and normal operation can be realized after power-on again.2. When only T: 99999999.999 appears on the LCD of the display screen, it is caused by an upgrade software error, and the correct file can be upgraded again to run normally.3. when the screen LCD stops showing PhotimeWhen Ver_0327 is used, 'Ver_0327' is the display version, because the upper computer is not turned off. If the uppe...
发布时间: 2019 - 03 - 19
浏览次数:2
There are many density meters on the market, but what kind of density meter is the most suitable for your working condition?  Here, our technical specialist, based on many years of experience, makes the following reference for your working conditions through some comparisons of major brands in the world-Comparison of Performance Parameters of Densitometers with Various Principles;序号品牌结构形式安装方式优点缺点粘度影响不适用场合气泡影响价格范围1艾默生插入式罐体管道安装方便测量精度高体积小受边界效应影响,即安装管道的直径和壁厚影响测量,对谐振臂振动影响大或腐蚀性大的场合不适用影响较大带颗粒较多的液体高速流动液体腐蚀性液体不适用7万左右2Endress+Hauser管道外夹装对射管道测量准确度高非接触安装方便适用范围广辐射大,环境污染严重目前已开始禁止使用,价格偏贵无影响无影响10万以上3费希尔双...
发布时间: 2019 - 03 - 19
浏览次数:1
The so-called two-channel ultrasonic flowmeter is actually equivalent to two ultrasonic flowmeters connected in parallel to measure the flow rate of fluid passing through a pipe section in a unit time, and then comparing and neutralizing the two data to obtain measurement data.The two-channel ultrasonic flowmeter not only overcomes the defect that the monophonic ultrasonic flowmeter is not suitable for the change of flow field and has low accuracy and unstable flow rate, but also the measurement principle is still based on the time delay method. Due to the optimized design of two channels, it ...
发布时间: 2019 - 03 - 19
浏览次数:3
1, electromagnetic flowmeter measuring liquid containing bubblesThe tiny bubbles mixed into bubble-like flow can still work normally, but the mixed volume flow with bubble volume is measured.  If the gas content increases to form a slug flow, the circuit may be instantaneously disconnected due to the electrode being covered by the gas, resulting in output shaking and even failure to work normally.2, electromagnetic flowmeter measurement of solid-liquid two-phase flow of liquidSolid-liquid two-phase fluid containing non-ferromagnetic particles or fibers can also measure the volume flow of ...
发布时间: 2019 - 03 - 19
浏览次数:1
According to Karman vortex street theory, vortex street is stable only when h/L =0.2806, which is the most basic condition of vortex flowmeter.Because only when the vortex street is stable can the vortex street flowmeter work normally.However, for conventional vortex flowmeter, there should be another important condition, that is, the Strouhal number Sr (i.e. meter coefficient k) should be kept constant within the measurement range.In fact, Sr and k are both functions of reynolds number ReD.A large number of tests have proved that when Red≥5000, vortex flowmeter will enter the measurable area....
发布时间: 2019 - 03 - 19
浏览次数:1
Conductivity is the ability of an object to conduct electric current.  The measuring principle of conductivity meter is to put two parallel polar plates into the solution to be measured, add a certain potential (usually sine wave voltage) at both ends of the polar plates, and then measure the current flowing between the polar plates.  According to ohm's law, the reciprocal of conductivity (g)-resistance (r) is determined by voltage and current.The basic unit of electrical conductivity is Siemens (S), originally called ohm.  Because the geometry of the conductivity cell affec...
发布时间: 2019 - 03 - 19
浏览次数:1
The structure of the intelligent integrated turbine flowmeter is explosion-proof design, which can display the total flow, instantaneous flow and flow full percentage. The battery adopts long-acting lithium battery. The service life of the single-function totalizer battery can reach more than 5 years, and the service life of the multi-function display meter battery can also reach more than 12 months.The intelligent integrated meter can display a large number of flow units. In cubic meters, gallons, liters, standard cubic meters, standard liters, etc., fixed pressure and temperature parameters ...
发布时间: 2019 - 03 - 19
浏览次数:1
Key words: PLC control systemI introductionIn the production process, any control system that automatically maintains a certain proportional relationship between two or more kinds of materials is called ratio control system.  Flow control is very important in chemical industry.  This paper mainly introduces a flow ratio control system. Experiments and practice show that the system has the advantages of simple structure, small steady-state error and high control precision.II. Working PrincipleThe ratio control system has three types: open loop ratio control, single closed loop ratio c...
发布时间: 2019 - 03 - 19
浏览次数:3
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