common difference ultrasonic flowmeter (
1)

Clip-on external clip-on ultrasonic flowmeter is the production of the first, the user the most familiar and most widely used ultrasonic flowmeter, converter installation without pipe flow, namely stick the box, it fully embodies the characteristics of the ultrasonic flowmeter installation is simple, easy to use (
2)

Pipe sections of some pipes because hydrophobic materials, guide, or corrosion is serious, the lining and the pipe space such as clearance reason, lead to serious, ultrasonic signal attenuation with outer clamp type ultrasonic flowmeter to measure, so the pipe sections of ultrasonic flowmeter.

Pipe sections of the ultrasonic flowmeter sensor and measurement of an organic whole, solved the outer clamp meter in the measurement of a problem.

And measuring accuracy is higher than other ultrasonic flowmeter, but also at the expense of the clip-on installed the ultrasonic flow meter does not block the advantages of open pipeline installation of sensors.
(
3)

Plug-in plug-in ultrasonic flow meter between the above two.

Can not stop in the installation, use of specialized tools in the water pipe to punch holes, insert the sensor into the pipe, complete the installation.

Because of the sensor in the pipe, the signal of the transmission and reception only after being measured medium, rather than through the tube wall and lining, so the measurement is restricted by pipe and lining material.


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Abstract: the flow meter selection techniques and steps of the information produced by excellent flow meter, flow meter manufacturer to offer you the quotation.

Flow meter, that is, flow meter, used very widely in the industry, now there are many industry equipment you need to use the flowmeter, now pay attention to accuracy and efficiency of the era, flowmeter can successfully use in industry is often very important, it.

More flow meter manufacturers choose model price quote you are welcome to inquire, here is a selection of flowmeter which is skill and step article details.

Flow meter, that is, flow meter, used very widely in the industry, now there are many industry equipment you need to use the meter, now pay attention to accuracy and efficiency of the era, flowmeter can successfully used in industry is often very important, so selection is a crucial link.

Because now the measured medium is different, the different status, and instrument variety, performance index is also different, cause some difficulties to the flowmeter selection.

There isn't a flowmeter can be used in any place, choosing the best flowmeter must choose zui, rather than zui expensive, play the strengths and advantages of flowmeter is our correct selection.

Generally speaking, the flowmeter selection, should start from five aspects, respectively is: instrument, fluid characteristics, performance, installation conditions, environmental conditions, economic factors, etc.

Fluid features: temperature, pressure, density, viscosity, chemical corrosion, abrasion, scaling, miscible phase transformation, conductivity, velocity, coefficient of thermal conductivity, specific heat capacity, such as entropy index;

2, installation conditions: pipeline arrangement direction, flow direction, testing a upstream and downstream straight pipe length, pipe diameter, space, power supply, grounding, auxiliary equipment maintenance (
Filter, venting device)
, installation, etc. ;

3, instrument performance: the degree of accuracy, repeatability, linearity and range, flow range, signal output characteristics, response time, pressure loss, etc. ;

4, the environmental conditions: temperature, humidity, electromagnetic interference, security, explosion-proof, pipeline vibration, etc. ;

5, economic factors: instrument purchase expense, installation, operating cost, calibration fee, maintenance fee, the service life of the instrument, spare parts, etc.

The above tells the story of flowmeter selection to consider several factors, so selection of steps should be how to?

1, on the basis of available fluid types and five aspects factor primary instrument type (
To have several types for selection)
；

2, the primary types and price information collection, data for further analysis and comparison of the preparation conditions;

3, using the elimination method gradually concentrated to 1 ~ 2 types, to comparative analysis zui repeatedly to five factors will determine the primary target.

Meter factory, thirty years of professional technology, absolutely * in selection, combination with the characteristics of flow meter according to the actual situation of the customer to give customers zui suitable flowmeter selection.

Flowmeter in all parts of the country, is accepted by the masses of users, the chemical industry, water treatment industry, scientific research and industry, petroleum industry, medical industry, environmental protection industry, etc. , have professional ability of non-standard products belong to the domestic ling first level, good professional technology, professional brand.

Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.
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Abstract: The selection information of the vortex flowmeter is provided by the excellent flowmeter and flowmeter manufacturers. As a new type of flowmeter, vortex flowmeter has developed rapidly since the mid-1980s. It has many advantages and advantages in flow measurement, and is more and more widely used in modern flow measurement. The use of vortex flowmeters for flow measurement in China is also more frequent. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following are the details of the selection articles of vortex flowmeters. As a new type of flowmeter, vortex flowmeter has developed rapidly since the mid-1980s. It has many advantages and advantages in flow measurement, and is more and more widely used in modern flow measurement. The use of vortex flowmeters for flow measurement in my country has also been paid more and more attention. At present, there are product series with excellent performance and independent intellectual property rights in China. Vortex flowmeter is developed based on fluid vibration. According to the difference of vortex, the detection method has gradually developed from hot wire type, thermal type to stress type, magnetic sensitive type, differential switched capacitive type, ultrasonic type, etc. Vortex flowmeters can be used in almost all occasions where a vortex column can be formed, not only in closed pipes, but also in open grooves. Compared with the turbine flowmeter, the vortex flowmeter has no moving mechanical parts, the maintenance workload is small, and the instrument constant is stable; compared with the orifice flowmeter, the vortex flowmeter has a large measuring range, small pressure loss and high accuracy , easy to install and maintain. However, there are many environment-related parameters of the vortex flowmeter, which are easily ignored in the use site and affect the correct performance of the flowmeter. The principle of the vortex flowmeter is to set a stagnation piece in the flowmeter pipeline. When the fluid flows through the stagnation piece, due to the stagnation effect on the surface of the stagnation piece, there will be two asymmetric columns downstream of the flowmeter. Vortex, these vortices are separated on the side and rear of the stagnation member, forming the so-called Karman vortex row, the rotation direction of the two rows of vortices is opposite, Karman theoretically proved that when h/L=0.281 (h is the two vortices) The width between the columns, L is the distance between two adjacent vortices), the vortex column is stable Reynolds number Re is a dimensionless number that characterizes the flow characteristics of viscous fluids, and its physical meaning is the inertial force of fluid flow and viscosity. Ratio of hysteresis. Therefore, the flow state of the fluid also has a certain influence on the use of the vortex flowmeter. If the environmental parameters have an influence on the fluid flow state, it will also affect the performance of the vortex flowmeter. After practice, the following aspects have an impact on the use of vortex flowmeters, and these problems should be analyzed. The measurement range of the vortex flowmeter is large, generally 10:1, but the lower limit of measurement is limited by many factors: Re>10000 is the most basic condition for the vortex flowmeter to work. In addition, it is also limited by the vortex energy, the medium When the flow rate is low, the strength and rotation speed of the vortex are also low, and it is difficult to cause the sensor element to generate a response signal, and the vortex frequency f is also small, which also makes signal processing difficult. The upper limit of measurement is limited by the frequency response of the sensor (such as the magnetic sensitive type generally does not exceed 400Hz) and the frequency of the circuit. Therefore, the flow rate range must be calculated and calculated during the design, and selected according to the flow rate of the fluid. The environmental conditions of the use site are complex. In addition to the environmental temperature, humidity, atmosphere and other conditions, electromagnetic interference should also be considered when selecting models. In strong interference such as high-voltage power transmission stations, large-scale rectifiers, etc., magnetic-sensitive, piezoelectric stress-type and other instruments cannot work normally or cannot measure accurately. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Selection of Vortex Flow Meters'
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Abstract: The advantages, type selection, installation and maintenance information of vortex flowmeters are provided by excellent flowmeter and flowmeter manufacturers. Vortex flowmeter is a new type of flowmeter successfully developed based on the principle of Karman vortex flow. It is characterized by small pressure loss, large measuring range and high precision. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following are the advantages, selection, installation and maintenance of vortex flowmeters. Vortex flowmeter is a new type of flowmeter successfully developed based on the principle of Karman vortex street. It is characterized by small pressure loss, large measuring range, high precision, and is almost not affected by parameters such as fluid density, pressure, temperature, viscosity, etc. when measuring the volume flow of the working condition. Because the vortex flowmeter has advantages that other flowmeters do not have, it has developed rapidly since its inception. According to statistics, the proportion of vortex flowmeters used in Japan, Europe and the United States and other developed countries has increased significantly, and it has been widely used in various fields. From this trend, the vortex flowmeter will dominate the future flow meters, and it is an ideal substitute for the orifice flowmeter. Long-term operation is very reliable; 2. The maintenance is very convenient, and the installation cost is low; 3. The sensor does not directly contact the medium, with stable performance and long life; Computer networking; 5. The measurement range is wide, the range ratio can reach 1:10; 6. The pressure loss is small, the operating cost is low, and it is more energy-saving; 7. Within a certain Reynolds number range, the output signal frequency is not affected by the physical properties of the fluid Influenced by the change of components, the instrument coefficient is only related to the shape and size of the vortex generator. There is no need to compensate the volume flow of the measured fluid, and there is no need to re-calibrate the coefficient of the instrument after replacing the accessories; 8. Wide application range, the flow rate of gas and liquid can be Measurement; 9. The verification period is 2 to 4 years. Vortex flowmeters have many advantages and are also suitable for flow measurement requirements in various working conditions. There is a lot of knowledge in the selection and installation of vortex flowmeters. When people choose and install a vortex flowmeter, they should focus on the following aspects: 1. Since the vortex flowmeter is a velocity type flowmeter, the stability of the vortex separation is affected by the flow rate, so it has a certain effect on the straight pipe section. 2. When measuring liquid, the upper limit flow rate is limited by pressure loss and cavitation, generally 0.5~8m/s; 3. When measuring gas, the upper limit flow rate is changed by the compressibility of the medium Limit, the lower limit flow rate is limited by the Reynolds number and the sensitivity of the sensor, the steam is 8 ~ 25m/s; 4. Since the stress vortex flowmeter is more sensitive to vibration, when the flowmeter is installed in a pipeline with large vibration, the pipeline must have certain 5. Since the stress-type vortex flowmeter uses piezoelectric crystals as detection sensors, it is limited by temperature, generally -40 to +300 °C. In addition, many troubles in the installation of vortex flowmeters are that long straight pipe sections are required in the front and rear, which will increase the installation cost of users and is also easily limited by the site. However, there are already some manufacturers that can provide the design of reducing the diameter inside the flowmeter. This design greatly reduces the user's need for special vortex flowmeters to be equipped with straight pipe sections, thus saving a lot of installation costs for enterprises. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Advantages, Selection and Installation and Maintenance of Vortex Flow Meters'
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Abstract: The difference information between vortex flowmeter and orifice flowmeter is provided by excellent flowmeter and flowmeter manufacturers. Abstract: In this article, we mainly compare the current technical level and comprehensive performance of vortex flowmeter and orifice flowmeter, and compare these two dimensions, so that we can further understand the difference between the two flowmeters. 1. Vortex flowmeter and orifice flow. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the difference between vortex flowmeters and orifice flowmeters. In this article, we mainly compare the current technical level and comprehensive performance of the vortex flowmeter and the orifice flowmeter, and let us further understand the difference between the two flowmeters. 1. Technical comparison between vortex flowmeter and orifice flowmeter ①. The structure of vortex flowmeter is relatively simple. It is mainly composed of three components: vortex generator, detection element and signal amplifier. The research on the vortex body is quite mature. The vortex body is in the form of a triangular column. At the same time, the vortex flowmeter also has the characteristics of easy installation, high precision, and stable operation for a long time. ②. The technical level of the orifice flowmeter at this stage is still at In order to determine the empirical formula as a basis, in 1980, the International Organization for Standardization merged the two standards of R541 and R781 into the standard ISO5167 (1980); ③, the structure of the orifice flowmeter is also relatively simple, low cost, reliable and other characteristics, the orifice flowmeter It can measure almost all media, and it can be used with differential pressure transmission, which is enough to make up for its own shortcomings; 2. Comparison of the comprehensive performance of vortex flowmeter and orifice flowmeter ①. The device is composed of a differential pressure transmitter, and the conduit needs to have heat tracing measures for the frozen installation. Usually, there are the following problems when using an orifice flowmeter to measure the flow:· It is easy to freeze, easy to block, easy to leak, and heat tracing can easily cause the aging of the differential pressure transmitter device. In some cases, the pressure guiding pipe needs to be added with isolation fluid. The lines are often unequal, resulting in a liquid column difference, which makes the flow indication inaccurate;· The above will change the flow measurement results and cause errors. For example, if the pressure guiding pipe is shortened and installed directly on the pipeline, there will still be a flow dead zone. ② Since the vortex flowmeter has few static sealing points, the flow measurement process will There will be no leakage and dead zone of medium flow, and no heat tracing measures are required for the pipeline, and it is not affected by the pressure, temperature, and viscosity of the medium. Summary: From the comparison of the above two points, it can be concluded that when measuring the same medium, the vortex street The advantages and failure rate of the flowmeter are obviously lower than the failure rate of the orifice flowmeter. This is the reason why the vortex flowmeter can increase the sales by about 30% in the market every year. The above is the whole content of this article. You are welcome to inquire about the flow of our factory. Type selection, quotation, etc. 'The difference between vortex flowmeter and orifice flowmeter'
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Unlike the u shape coriolis mass flow meter, the is more flexibly used in accasions where low flow turbine flow meter .