The main features of the V cone flowmeter are the disadvantages

Disadvantages: 1: If the medium has particle impurities, it is easy to block.

2: I have customers say that some pipeline valves open too quickly and the pressure suddenly comes over, which will break the cone probe and even break the pipe.

3: The pressure loss is the largest in the non-movable parts such as electromagnetic, vortex, thermal, and Weiliba, and the non-orifice plate principle flowmeter, and there will be about 10 20% pressure loss, and the pressure loss is greater when several units are used on a pipeline.

4: If the watch is broken, it must be removed, and it is very troublesome for many enterprises to shut down.

5: Because it is a differential pressure type, pressure and temperature compensation are required, and these two compensation probes are easier to break than flowmeters.

6: The range ratio is small, generally 1:10, good to 20, and electromagnetic can generally reach 100, except for electromagnetic and thermal, other flowmeters are in small flow measurement accuracy drops a lot, or even can not be measured.

Advantages: 1: can withstand high temperatures, up to about 600 degrees, in fact, it is better to be relatively low, because the stainless steel material is brittle for a long time, and now many manufacturers have made a bracket to weld the cone inside the pipe to avoid breaking.

2: If the environmental particles are not very many, the fluid flow ratio is not too large, the product process allows the life is very long, the quality is stable, because it is a differential pressure type, the quality is still very good.

I can only say a few at once, you measure the steam, if the pressure loss is allowed, the flow rate is not too fluctuating, it is still good. In addition, although many manufacturers say that they do it themselves, the differential pressure transmitter is mainly used in Sichuan Chuanyi (Henghe) or Rosemount, so most of them are assembled. It mainly depends on the qualifications of the other party, whether there is a certificate, and the calibration device.

I recommend you to find Shanghai Huaqiang, I have done it there, they can still do it, although it may be in the middle and upper in China, and reliability is important. You can communicate more about the working conditions on site.

High accuracy: the accuracy of the V-cone flowmeter [2] is the measured value, and the measurement level is the system accuracy, which needs to refer to the accuracy of the application bar and the secondary instrument).

Good repeatability: The repeatability of the V-cone flowmeter is very good.

Wide range ratio: The V-cone flowmeter has a much larger range than other types of differential pressure flowmeters, which is normally 10:1 and can be increased if necessary.

The output signal is linear when the Reynolds number is higher than 8000, and can be measured below 8000, but the output signal needs to be corrected according to the curve.

Low requirements for straight pipe sections: Bo effort equation requires the measured fluid to be an ideal fluid, which is simply impossible in practical applications, and many situations will cause uneven fluid distribution, such as elbows, valves, reducers, expanders, pumps, tees, etc., which is a difficult problem to solve for other instruments.

Hello, the U.S. imported V-cone flowmeter manufacturer - Kornko KNKE is very happy with your question.

V-cone flowmeter is a high-precision, stable flow measurement device, which uses a unique V-cone to change the flow rate of fluid, which is suitable for measuring the flow rate of various liquids or gases.

The working principle of the V-cone flowmeter is that when the fluid passes through the V-cone flowmeter, the shape of the cone will change, and according to the flow rate of the fluid, the shape of the cone will change accordingly, and then the flow rate will be changed. This working principle makes the V-cone flowmeter have the advantages of high precision, fast response and long service life.

Coenco flow meter.

V-cone flowmeter can be widely used in various industrial occasions, such as petroleum, chemical, electric power, water treatment, etc. It is capable of measuring the flow of various fluids, such as water, oil, gas, etc., and different models are available according to different fluid types.

The V-cone flowmeter is easy to install and easy to operate, and can be installed directly on the pipeline. It also has the adaptability of high temperature, high pressure and other special environments, and can work normally in various special environments.

In short, the V-cone flowmeter is a high-precision, stable flow measurement device, which has a wide range of application prospects. The use of V-cone flowmeters in industrial occasions can improve production efficiency and improve work efficiency.

The above is the U.S. imported V-cone flowmeter manufacturer - Kornko KNKE, about the problem. If you have the purchase needs of V-cone flowmeter, please go to the official website of KNKE to select and purchase, or ask KNKE professional and technical personnel to find the most suitable product for you.

V-cone flowmeter is a kind of differential pressure flowmeter that began to be developed in the 80s of the 20th century, and its development success is a qualitative leap in differential pressure flow measurement.

The effect of the average velocity of the fluid, the signal is stable: the "signal fluctuation" is 1 10 of the orifice plate, so the installation of the required straight pipe section is short, which solves the problem that the straight pipe section of the differential pressure instrument is too long (0 3d straight pipe section in the front, 0 1d straight pipe section in the rear) that has plagued users for a long time.

High precision, good repeatability, wide range ratio 10 1.

Wear-resistant, long-term stability and accuracy, no need for repeated calibration.

The V-Cone Flowmeter is a flowmeter based on the Venturi Effect principle, which measures the flow rate by using the phenomenon of increasing velocity and decreasing pressure of a fluid in a conical tube. It usually consists of a conical tube and two straight tubes, and the fluid enters the conical tube from the wide end, where the velocity increases, the pressure decreases, and then flows out from the narrow end outlet. Based on the relationship between the flow rate and the differential pressure, the flow rate can be calculated.

The advantages of the V-Cone Flow Meter include:

Wide measuring range: V-cone flowmeters are suitable for a wide range of fluid media and are capable of measuring a wide range of flows, from a few liters per minute to several thousand liters per minute.

High accuracy: Due to the particularity of the structure and principle of the V-cone flowmeter, its accuracy is relatively high, and it can usually achieve high accuracy.

Maintenance-free: V-cone flowmeters require no moving parts, no parts replacement or regular maintenance, and therefore have a long service life and high reliability.

V-cone flowmeter is widely used in flow measurement in chemical, petroleum, metallurgy, energy and other fields.

Selection of V-cone flowmeter:

V-cone belongs to the design instrument, our factory is according to the user's common flow, common pressure, medium type, maximum flow, minimum flow and other parameters, design different aperture ratio, different flow range of V-cone flowmeter.

Design is the key, and if the design is not good, the site will definitely not be accurate.

This article introduces the selection of V-cone flowmeter in detail. It is mainly divided into parameters and methods required for selection. If you think the answer is helpful to you, please raise your hand and give a thumbs up to the American Vedun Vton flow meter!

The V-cone flowmeter also belongs to a differential pressure flowmeter (composed of a V-cone flow sensor and a differential pressure transmitter), which analyzes the process parameters and key points required for the selection of the V-flow meter to help the instrument worker correctly select the V-flowmeter.

Process parameters required for V-cone flowmeter selection.

1. The name of the fluid.

2. Pipe inner diameter (unit: mm).

3. Select the type of V-cone flowmeter (flange type, direct welding type and clamp type).

4. The V-cone flowmeter is measured in the scale flow unit (kg h, t h, m3 h, nm3 h) in the working state and the standard state

5. The common flow rate of V-cone flowmeter.

6. The minimum and maximum flow rates of the V-cone flowmeter in the working state and the standard state (the state of the flow rate should be stated when the medium is gas).

7. Working pressure (absolute pressure and gauge pressure, unit: MPa).

8. The highest, lowest and commonly used temperature of the fluid (unit: ).

9. The density of the fluid (unit: kg m3) in the working state and the standard state (the state of the flow rate should be stated when the medium is gas).

10. Fluid viscosity (unit:

11. Relative temperature.

12. Percentage of gas composition volume (for more than two kinds of mixed gases).

Key points for the selection of V-cone flowmeter.

1. The design and selection of V-cone flowmeter shall obtain the detailed and accurate parameters of the user's process, or the selection specification of the differential pressure flowmeter of the design institute.

2. Select the V-cone flowmeter according to the physical and chemical characteristics of the medium, the working conditions, the accuracy, the installation requirements, etc.

3. According to the type of medium, temperature, pressure, corrosiveness and other requirements, select the corresponding pipe, flange, cone and pressure method of the flowmeter to select the material of the V-cone flowmeter.

4. According to the temperature, flow rate and pressure of the medium, select the nominal diameter, wall thickness, pressure level, sealing surface and connection form of the Vton flowmeter pipeline.

5. According to the temperature, pressure and viscosity of the medium, whether it is dirty or not, select the pressure method and the material and grade of the pressure connector to select the V-cone flowmeter.

6. According to the combination of the above selection, the model of the V-cone flow sensor is obtained. The structural dimensions of the V-cone flowmeter can be found from the manufacturer's size table, whether it is equipped with matching flanges, bolts, nuts, gaskets, valve groups and other accessories, which need to be explained in the remarks column, and the basic requirements for the installation of the straight pipe section are carried out according to the requirements of the straight pipe section.

7. The design and calculation of the V-cone flowmeter uses all the process parameters and the selection of appropriate values to calculate and obtain the ideal differential pressure value, range ratio and pressure loss.

8. In order to facilitate the V-cone flowmeter to be equipped with a differential pressure transmitter, it is recommended that the differential pressure value of the scale be selected in the range of 10-30kPa; For low flow rates, it is only possible to select the differential pressure above; If a double-flange differential pressure transmitter is used to take the pressure, the differential pressure should be more than 3kpa as far as possible.

Elements of the selection of the installation site of the V-cone flowmeter:

1. The shock and vibration of the installation site V-cone flowmeter is designed to withstand a certain amount of impact and vibration. However, it should also be installed in a place with no or little vibration as much as possible.

2. Please try to avoid installing the flowmeter in a place where the ambient temperature changes greatly, if the installation location is directly exposed to thermal radiation or exposed to the sun, waterproof, thermal insulation radiation and ventilation measures should be taken.

3. The V-cone flowmeter under ambient air conditions at the installation site should be avoided in a corrosive environment as much as possible, and if it is used in a corrosive environment, it should have good ventilation and pay attention to avoid corrosive gases or liquids immersed in the instrument.

V-cone flowmeter is a flow measurement instrument, mainly used in the flow measurement of liquids and gases, in the process of use, the V-cone flowmeter has high measurement accuracy and good stability, and has been widely used in the field of flow measurement.

What should be paid attention to when installing a V-cone flowmeter

1. Pay attention to the flow direction of the flowmeter and do not install it in reverse.

2. All connectors must be tightened. All gaskets must not protrude from the inner wall of the pipe.

3. The high and low pressure ports of the differential pressure transmitter cannot be reversed.

4. When measuring liquid, it is necessary to prevent the gas contained in the liquid from entering and accumulating in the measuring room of the impulse pipe and transmitter.

5. When measuring gas, it is necessary to prevent the liquid that may be contained in the gas from entering and accumulating in the impulse pipe and transmitter measurement room.

6. Measure high-temperature liquids and gases to prevent high-temperature medium from damaging the transmitter, measure strong corrosion, easy crystallization, easy to block the medium, and prevent corrosive medium from entering the transmitter.

7. The installation position of the differential pressure transmitter should be far away from electrical noise, such as high-power transformers, motors, welding machines and strong power supplies. There can be no radio frequency interference near the instrument, otherwise it will interfere with the normal operation of the differential pressure transmitter.

8. The flow sensor should be avoided as far as possible to be installed near the valve outlet.

9. The flowmeter should not be installed on the long and thin pipe overhead, and if it must be installed, the part where the flowmeter is installed must be fixed.

10. Measurement of steam.

The measurement of steam is a difficult task of flow measurement, the thermal properties of steam are more complex than the ideal gas, the thermal properties of steam can not be obtained by theoretical methods alone, in many cases, some data are obtained by experimental methods to summarize some formulas, and the measurement accuracy of steam is not high (GB T17167 enterprise energy measuring instrument performance requirements, the steam accuracy requirements for ** settlement are +, and the requirements for installation are particularly strict, The general principle of installation is: a) the position of the transmitter should be lower than the condensate tank in any case. b) The condensate tank and the liquid phase impulse pipe are completely liquid at the same temperature.

c) The flow path of the vapor phase impulse pipe is smooth and the vapor phase is mainly used in the pipe.

V-cone flowmeter is a new type of differential pressure flow measuring device with a pointed cone coaxially installed in the measuring tube as the throttling part, which is a new type of throttling device based on the venturi measurement principle and integrating the advantages of classic venturi tube, annular orifice plate and wear-resistant orifice plate.

Due to the special structure of the V-cone flowmeter, it has the following characteristics: 1. The upstream and downstream straight pipe sections are required to be short: the length of the upstream straight pipe section is 0-3d, and the length of the downstream straight pipe section is 0-1d.

2. Accuracy: ; Repeatability is; The turndown ratio reaches 15:1.

3. Dirt resistance and small pressure loss. 4. It has the effect of flow adjustment and mixing of fluid. 5. It is easy to install and is an ideal flowmeter for technical transformation; 6. Maintenance-free or little maintenance workload.