Abstract: the common gas chromatograph instrument maintenance methods of information produced by excellent flow meter, flow meter manufacturer to offer you the quotation.

Gas chromatograph is often used for quantitative analysis of the organic matter, when the instrument is running after a period of time, due to static electricity, instrument internal easy to absorb more dust;

PCB and PCB socket except with dust adsorption, also often and some organic vapor adsorption.

More flow meter manufacturers choose model price quote you are welcome to inquire, the following is a common gas chromatograph instrument maintenance methods of the article details.

Gas chromatograph is often used for quantitative analysis of the organic matter, when the instrument is running after a period of time, due to static electricity, instrument internal easy to absorb more dust;

PCB and PCB socket except with dust adsorption, often with some organic vapor adsorption;

, because of lower part of the freezing point of the organic matter in the injection port position often find solidification of organic matter, distribution piping in use after a period of time, inner diameter and even blocked by organic matter;

In use process, TCD detector are likely to be organic matter pollution;

FID detector for a long time used in analysis of organic matter, organic matter in the nozzle or collect pole position deposit or nozzle, collect some carbon deposit often occurred.
1 instrument internal purging, clean (

Henan, hubei, hunan, agilent gas chromatograph/gas chromatography maintenance)

Gas chromatograph after downtime, open the side and back panel of the instrument, instrument air or nitrogen purging of instrument internal dust to dust more or it is not easy to purge the place with a soft brush with handle.

Purging is completed, the existence of the local water organic pollution of an instrument or organic solvent to scrub, to wipe water soluble organic matter to water, in areas not thoroughly clean can be treated with organic solvent, the water-insoluble or may react with water with organic matter does not react with the organic solvent to clean, such as toluene, acetone, carbon tetrachloride, etc.

Note that in the process of wiping instrument can't surface of instrument or other components caused by corrosion or secondary pollution.
2 circuit board maintenance and cleaning,

Henan, hubei, hunan, agilent gas chromatograph/gas chromatography maintenance)

Gas chromatograph preparation before repair, cut off the instrument power, first with instrument air or nitrogen purging of circuit board and circuit board slot, purging with a soft brush with dust in the circuit boards and slot more carefully clean up the part.

Try to wear gloves during operation, to prevent electrostatic or hand perspiration impact part of the circuit board components.

Purging work is completed, the usage of circuit board should be carefully observed, whether printed circuit boards or electronic components have obvious corrosion phenomenon.

For circuit boards with organic matter of electronic components and printed circuit with dip in with cotton wool take alcohol to wipe, PCB interface and slot part also want to wipe.
3 injection port cleaning (

Henan, hubei, hunan, agilent gas chromatograph/gas chromatography maintenance)

In the maintenance, the gas chromatograph sample mouth glass liner, shunt tablet, injection port distribution piping, EPC etc. Parts are cleaning is very necessary.

Glass liner and diversion plate cleaning: be careful to take out the glass liner from the instrument, use tweezers or other small tools carefully remove the liner of glass wool and other impurities, move the process not to scratch the surface of the liner.

If the condition allows, can be preliminary cleaning glass liner in organic solvent by ultrasonic cleaning, drying after use.

Can also clean directly with the organic solvents such as acetone, toluene, after completion of cleaning after drying can be used.

Shunt tablet zui for ideal cleaning method is ultrasonic processing in solvent, drying after use.

Also can choose a suitable organic solvent to clean: from the injection port shunt tablet, after first use the inert solvent cleaning, such as toluene with methanol alcohol solvent cleaning, drying after use.

Bypass of the pipeline cleaning: gas chromatograph in analysis of organic and polymer compounds, many organic compounds with low freezing point, samples from the gasification chamber through the bypass pipeline in the process of organic matter in the shunt line set.

Gas chromatograph after long time of use, the inner diameter of the pipe diversion became smaller, and even completely blocked.

Distribution piping blocked, instrument, injection port display abnormal pressure peak deformation difference, abnormal results.

In the process of maintenance, whether can advance judge distribution piping without blocking phenomenon, all need to bypass pipeline cleaning.

Distribution piping cleaning generally choose the organic solvents such as acetone, toluene, distribution piping of jams sometimes used simple cleaning methods are difficult to clean, need to take some other auxiliary mechanical method to complete.
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Reach us at Sincerity Flow Meter. We'll always try to give you the BEST deal on . If we can't, we'll at least give you some hel pful advice. Please use our experience!
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Abstract: the application of the gas flow detection technology information produced by excellent flow meter, flow meter manufacturer to offer you the quotation.

Abstract: start from the status quo of hot blast stove gas pipe flow are analyzed, from the existing problems, the cause of the problem and solving measures three aspects detailed analysis, combined with the actual, through to the stove with the gas pipe flowmeter HuanXing renovation, to improve the gas.

More flow meter manufacturers choose model price quote you are welcome to inquire, here is the application of the gas flow detection technology for details.

Start from the status quo of hot blast stove gas pipe flow are analyzed, from the existing problems and the cause of the problem and solving measures from three aspects, analyzes in detail, combined with the actual, through to the stove with the gas pipe flowmeter HuanXing renovation, to improve the precision rate of the gas flow measurement test.

1, iron status quo overview shares 5 #, 6 # top combustion hot blast stove system respectively in July 2005 to November H2005 completed and put into operation, the Russian hopper technology design, each have 3 blast furnace.

5 #, 6 # hot blast stove system gas manifold V cone flowmeter, and the power flow meter were used respectively to measure the gas flow rate.

Since 2009, as a result of V cone flowmeter, and the power flow meter appear different degree of congestion, the two stove with the gas pipe flow can't accurate detection, the hot blast stove, and blast furnace brought adverse effect on normal production.

2 shares, the existence question and the reason analysis of ironmaking in building 5 #, 6 # blast V cone flowmeter, and the power flow meter were used respectively to measure stove with the gas pipe flow, as shown in figure 1.

Two blast furnace put into production for nearly six years, because of the large gas branch pipe gas moisture, impurities, very easy to form a sticky, often appear flowmeter block fault, makes the gas flow measurement is not accurate, hot blast stove post worker can't accurate control of gas and air flow rate, unable to effectively improve the supply air temperature.

5 # blast V cone flowmeter, by upper and lower flange connection on the gas pipes, unable to remove the cleaning;

Adopted by the power of 6 # blast flowmeter flowmeter congestion problems, need to clean out from gas pipe flowmeter, the process gas pipe gas leakage is serious, easy to cause the gas poisoning accidents, to maintenance staff has brought the very big security hidden danger.

3, gas flow optimization support technology in view of the above problems existing in the coal gas flow measuring, we carried out reform, use the opportunity of blast furnace repair and overhaul, the two blast furnace hot blast stove system of gas detection HuanXing flowmeter, installation using pitot flowmeter.
1 pitot working principle of the flowmeter.

Pitot flowmeter were extracted using pitot principle of fluid velocity (
A static pressure = dynamic pressure)

Again and converted to the fluid volume flow to mass flow of differential pressure type flowmeter.

Pitot flowmeter will probe is inserted into the pipe, the total pressure hole for fluid to flow direction, the static pressure hole for fluid to flow direction, through high precision transducer made the difference between the total pressure and static pressure that we have to differential pressure, fluid flow is calculated according to differential pressure.

Pitot and flow sensor can realize each probe are on high precision standard wind tunnel from Om to 150 m/s/s wind speed calibration, measuring point in the center pipe, and the calibration data obtained through a complex arithmetic probe correction coefficient, the revised so that the center of the probe to extract the velocity and the average of each point in the pipeline flow form corresponding relation.

Mean value of each point in the pipeline flow velocity, and the relationship between the probe to extract the center flow is based on decades of blowing data, tsinghua university.
3.
2 pitot flowmeter its unique advantages.

Pitot and flow sensor fundamentally solves the problem such as wind speed measuring volatility, creeping, wear-resisting;

Through online dredge, hang dirty easily solved the medium flow rate measurement, the measurement accuracy is higher.

Such as measuring range: flow, medium resistance to high temperature and high pressure;
Energy saving, high accuracy and high reliability;
Installation is simple, easy to maintain, and so on.

4, the gas flow metering detection technology retrofit scheme in determining the good use of new type pitot after the flowmeter, we consult factory, installation and debugging of the flowmeter.

1 determine the pitot probe flowmeter's installation position.

3 meters, because v cone flowmeter affect the air flow within a certain distance below, even produce eddy current, so we can not in hot blast stove l4 m platform near the v-shaped cone under the flange installation pitot probe flowmeter.

So make sure the hot blast stove of seven meters platform with a straight pipe gas pipe installation, welding and the pitot flowmeter installation platform.

And 6 # hot blast stove in before the power meter, because the power of the flowmeter is external vertically inserted into the gas pipe from the pipe, so in the demolition of the power flow meter and close a valve, the 14 m platform gas stove straight pipe are installed at pitot flowmeter.
4.
2 install the pitot probe flowmeter.

Prevent type pitot and installation used in vertical pipe runs from the external vertical plug-in installation, installation has a threaded connection and a variety of ways such as flange connection.

Mounted with flange connection, only need the measurement line in around 50 ram of drill a hole, then connect flange positioning welding on the pipe, zui, insert the pitot and duct in accordance with the requirements, through the bolt and the flange fastening.

Pitot type probes are simple structure, the flowmeter can plug online.
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Abstract: A brief introduction to the principle and hot information of vortex flowmeters is provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Abstract: The measurement principle and application of vortex flowmeter are introduced. The selection of vortex flowmeter, parameter setting of vortex flowmeter, installation and use precautions are introduced in detail. Compared with the orifice plate flowmeter, it has the advantages of simple structure, convenient installation and maintenance, and measurement range. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is a brief introduction to the principles of vortex flowmeters and details of hot articles. The measurement principle and application of vortex flowmeter are introduced. The selection of vortex flowmeter, parameter setting of vortex flowmeter, installation and use precautions are introduced in detail. Compared with the orifice plate flowmeter, it has the characteristics of simple structure, convenient installation and maintenance, and wide measuring range. In the 1980s, people generally used standard orifice flowmeters for saturated steam flow measurement, but from the perspective of the development of flow meters, orifice flowmeters have a long history and wide application range; people have the most complete research on it, and the most experimental data. Although the standard orifice flowmeter is used to measure the saturated steam flow, it still has some shortcomings: first, the pressure loss is relatively large; second, the pressure guiding pipe, the three groups and the connecting joints are easy to leak; The measurement range is small, generally 3 to 1, and the large fluctuation of the flow rate will easily cause the measured value to be low. The vortex flowmeter has a simple structure, and the vortex transmitter is directly installed on the pipeline, which overcomes the phenomenon of pipeline leakage. In addition, the pressure loss of the vortex flowmeter is small, the range is wide, and the measurement range ratio of saturated steam can reach 30 to 1. Therefore, with the maturity of vortex flowmeter measurement technology, the use of vortex flowmeter is more and more popular. 1. The measurement principle of vortex flowmeter The vortex flowmeter uses the principle of fluid oscillation to measure the flow. When the fluid passes through the vortex flow transmitter in the pipeline, the vortex generator of the triangular column alternately generates up and down proportional to the flow rate. Two rows of vortices, the release frequency of the vortex is related to the average velocity of the fluid flowing through the vortex generator and the characteristic width of the vortex generator, which can be expressed by the following formula: f=Stv/d where: f is the release frequency of the vortex, Hz; v is the The average velocity of the fluid flowing through the vortex generator, m/s; d is the characteristic width of the vortex generator, m; St is the Strohha number, dimensionless, and its value ranges from 0.14 to 0.27. St is a function of Reynolds number, St=f(l/Re). When the Reynolds number Re is in the range of 102~105, the St value is about 0.2. Therefore, in the measurement, try to satisfy the Reynolds number of the fluid in the range of 102~105 and the vortex frequency f=0.2v/d. It can be seen that the average velocity v of the fluid flowing through the vortex generator can be calculated by measuring the vortex frequency, and then the flow rate q can be obtained from the formula q=vA, where A is the cross-sectional area of ​​the fluid flowing through the vortex generator. When the vortex is generated on both sides of the generating body, the piezoelectric sensor is used to measure the change of the alternating lift force perpendicular to the flow direction of the fluid, and the change of the lift force is converted into an electrical frequency signal, and then the frequency signal is amplified and shaped, and then output to the secondary The instrument is accumulated and displayed. 2. Application of vortex flowmeter 1. Selection of vortex flowmeter (1) Selection of vortex flowmeter Due to the wide range of the vortex flowmeter, in practical applications, the main consideration is that the flow rate of saturated steam shall not be lower than the lower limit of the vortex flowmeter, that is to say, the fluid velocity must not be lower than 5m/s . Vortex flow transmitters with different diameters are selected according to the size of the steam consumption, and the diameter of the transmitter cannot be selected with the existing process pipe diameter. (2) Selection of pressure compensation pressure transmitter Because the saturated steam pipeline is long and the pressure fluctuates greatly, pressure compensation must be used. Considering the corresponding relationship between pressure, temperature and density, only pressure compensation can be used in the measurement. The saturated steam pressure of the company's pipeline is in the range of 0.3-0.7MPa, and the range of the pressure transmitter can be selected as 1MPa. (3) Display instrument selection Display instrument Intelligent flow indicator has the functions of temperature and pressure compensation, instantaneous flow display and cumulative flow accumulation. 2. Most settings of the vortex flowmeter (1) The setting of the instrument system, the instrument coefficient K that needs to be set by Hefei Instrument Factory can be expressed by the following formula: K=1000/K0 In the formula: K0 is the vortex generator in The instrument constant calibrated at the factory, L/pulse; the unit of k is the number of pulses/m3. (2) Range setting of pressure compensation pressure transmitter. (3) Pressure and flow alarm upper limit setting. 3. Installation of vortex flowmeter (1) The vortex flowmeter should be installed as far as possible away from the vibration source and the place with strong electromagnetic interference. The vibration damping device must be used in the place where the vibration exists to reduce the influence of the pipeline by vibration. (2) The configuration of the straight pipe section, the front and rear straight pipe sections should meet the requirements of the vortex flowmeter,The inner diameter of the pipeline must also be the same as the inner diameter of the vortex flow transmitter. 4. Precautions for the use of vortex flowmeters Minimize the impact of the steam hammer in the pipeline on the vortex generating body. When the vibration is large and cannot be eliminated, the vortex flowmeter should not be used. 3. Conclusion After the vortex flowmeter was put into use in our company, it has overcome many shortcomings of the original orifice flowmeter, and the measurement of saturated steam is more accurate and stable, and maintenance is convenient, but it is worth noting that the flow rate of saturated steam fluid cannot be measured. Below 5m/S, otherwise, the flow measurement value will be low. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'On the Principles and Hotspots of Vortex Flow Meters'
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The major classifications of are rosemount coriolis mass flow meter, digital fork density meter, endress hauser coriolis mass flow meter and rosemount vortex flow meter machines.

The following problems should be paid attention to in the use of gas waist wheel flowmeter&.In order to prevent jamming and blockage, a filter with an appropriate mesh size should be installed in front of the flowmeter, and attention should be paid to sewage discharge, inspection and cleaning of the filter screen. ^The instrument should be bypassed before it is put into operation, and ensure that there is no welding slag and other garbage in the pipe section before the instrument and after the filter. The operation steps are the same as the gas turbine flowmeter described above. Prevent the waist wheel from running under overspeed conditions. . Liquid accumulation in the metering cavity should be prevented. For this reason, the instrument should be installed vertically, and the flowmeter should be higher than the process pipeline so that the liquid accumulation can be discharged regularly. When there is a problem with the operation of the positive displacement flowmeter, the pressure difference between the upstream and downstream may change accordingly, so the maintenance personnel should always pay attention to observe the pressure difference, so as to make a judgment on whether the fault exists. The steam for flushing the pipeline is forbidden to pass through the flowmeter. I regularly remove, wash, maintain and lubricate. The disadvantage of positive displacement flowmeter is that it is noisy when rotating at high speed. Once the rotating part is stuck by garbage, it will affect the supply of natural gas. Another special feature of it is the pressure-reducing pulsation. According to the measurement principle, small pressure pulsations are produced when the waist wheel turns. Under normal circumstances, this pulsation has no effect on its own measurement, but it may affect the accuracy of the standard flowmeter when the standard meter is connected in series with the waist wheel flowmeter for calibration.
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Thermal Mass Flowmeters for All Industries

Thermal mass flowmeters are an essential tool for various industries, providing accurate measurements of gas flow rates. These flowmeters are designed to measure the mass flow of gases, making them suitable for a wide range of applications. Whether it's monitoring the flow of natural gas in the energy industry or controlling the flow of air in HVAC systems, thermal mass flowmeters are a reliable and cost-effective solution. In this article, we'll explore the benefits of thermal mass flowmeters for different industries and their unique characteristics that make them an ideal choice for gas flow measurement.

Understanding Thermal Mass Flowmeters

Thermal mass flowmeters operate based on the principles of heat transfer. They use a heated sensor to measure the gas flow rate, and the amount of heat required to maintain the sensor at a constant temperature is directly proportional to the mass flow rate of the gas. This method allows for accurate and direct measurement of mass flow, making thermal mass flowmeters suitable for a wide range of gases, including clean gases, mixed gases, and corrosive gases. Additionally, thermal mass flowmeters offer high accuracy and repeatability, making them a preferred choice for industries where precise gas flow measurement is crucial.

Thermal mass flowmeters are also known for their low pressure drop, making them suitable for applications where minimal disturbance to the flow is desired. This characteristic is particularly beneficial in industries such as pharmaceuticals, where the purity of gases is critical, and any disruption to the flow can compromise the integrity of the products being manufactured. Furthermore, thermal mass flowmeters are highly versatile, with the ability to measure gas flow rates from as low as a few sccm (standard cubic centimeters per minute) to as high as several thousand scfm (standard cubic feet per minute), making them suitable for a wide range of flow rate requirements across different industries.

Benefits of Thermal Mass Flowmeters

The use of thermal mass flowmeters offers several advantages across various industries. One of the primary benefits is their ability to measure the mass flow rate directly, without the need for additional pressure or temperature compensation. This makes thermal mass flowmeters easy to install and operate, reducing the overall cost of ownership for end-users. Additionally, thermal mass flowmeters can provide accurate measurements even in low flow conditions, making them ideal for applications where precise control of gas flow is necessary.

Another key benefit of thermal mass flowmeters is their minimal maintenance requirements. Unlike other types of flowmeters that may be prone to mechanical wear or clogging, thermal mass flowmeters have no moving parts, reducing the need for regular maintenance and calibration. This not only saves time and resources but also minimizes downtime and disruptions to the production process. Additionally, the lack of moving parts contributes to the long-term reliability of thermal mass flowmeters, ensuring consistent and accurate performance over time.

Thermal mass flowmeters are also highly responsive, providing real-time measurements of gas flow rates. This rapid response time is crucial for applications where quick adjustments to gas flow are necessary, such as in combustion control or process optimization. The ability to monitor and control gas flow in real-time allows industries to improve efficiency, reduce waste, and maintain consistent product quality. Moreover, thermal mass flowmeters are highly resistant to vibrations and external influences, making them suitable for use in harsh and demanding environments, such as aerospace or automotive manufacturing.

Applications Across Industries

Thermal mass flowmeters find applications in a wide range of industries, each with its unique requirements and challenges. In the oil and gas industry, thermal mass flowmeters are used to measure the flow of natural gas in pipelines, ensuring accurate billing and custody transfer. Their ability to handle dirty and corrosive gases makes them an ideal choice for gas flow measurement in challenging oil and gas applications.

In the pharmaceutical and biotechnology industries, thermal mass flowmeters are employed to monitor and control the flow of gases used in various processes, including fermentation, cell culture, and purification. The high accuracy and reliability of thermal mass flowmeters are crucial for maintaining strict quality standards and ensuring the integrity of pharmaceutical products.

In the semiconductor and electronics manufacturing sectors, thermal mass flowmeters are used to measure and control the flow of specialty gases, such as argon, helium, and nitrogen, which are essential for various manufacturing processes. The ability of thermal mass flowmeters to provide accurate measurements at low flow rates is particularly beneficial in these industries, where precision and purity are of utmost importance.

In the food and beverage industry, thermal mass flowmeters are utilized for the accurate measurement of gases, such as carbon dioxide and nitrogen, used in a range of applications, including carbonation, inerting, and modified atmosphere packaging. The ability of thermal mass flowmeters to handle clean gases and provide accurate measurements at varying flow rates makes them an ideal choice for food and beverage processing.

In the energy sector, thermal mass flowmeters play a vital role in measuring the flow of air and other gases in combustion processes, boiler feedwater, and emissions monitoring. Their ability to operate at high temperatures and pressures, as well as their resistance to vibrations, make them suitable for the challenging conditions encountered in power plants and renewable energy facilities.

Future Developments and Innovations

As technology continues to advance, so do the capabilities of thermal mass flowmeters. One of the key areas of development is the integration of advanced diagnostics and smart features into thermal mass flowmeters, enabling proactive maintenance and remote monitoring. These innovations allow end-users to optimize performance, predict potential issues, and maintain the long-term reliability of their gas flow measurement systems.

The use of advanced materials and coatings is another area of focus for future developments in thermal mass flowmeters. By enhancing the resistance of flowmeter components to corrosion, abrasion, and high temperatures, manufacturers can expand the range of applications where thermal mass flowmeters can be used, opening up new opportunities for industries with challenging operating conditions.

Furthermore, ongoing research in sensor technology and signal processing is driving improvements in the accuracy, response time, and measurement range of thermal mass flowmeters. These advancements will enable thermal mass flowmeters to meet the evolving needs of industries where gas flow measurement is critical for process optimization, product quality, and environmental compliance.

Conclusion

Thermal mass flowmeters are a versatile and reliable solution for measuring gas flow rates across a diverse range of industries. Their ability to provide direct and accurate mass flow measurements, coupled with low maintenance requirements and high responsiveness, makes them an ideal choice for applications where precision and control of gas flow are essential. As technology continues to advance, the capabilities of thermal mass flowmeters will only continue to improve, offering even greater benefits to industries seeking to optimize their gas flow measurement systems.

In conclusion, the use of thermal mass flowmeters offers numerous advantages across industries, from oil and gas to pharmaceuticals to semiconductor manufacturing. The future of thermal mass flowmeters holds promising developments, including enhanced diagnostics, advanced materials, and improved sensor technology, further cementing their position as a go-to solution for gas flow measurement. Whether it's for monitoring natural gas flow in pipelines, controlling the flow of specialty gases in electronics manufacturing, or ensuring the purity of gases in food processing, thermal mass flowmeters are an indispensable tool for achieving efficiency, accuracy, and reliability in gas flow measurement.

mass flow meter insertion ultrasonic flow meter has gained a lot of popularity over the recent past.
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What Beijing Sincerity Automatic Equipment Co., Ltd discovered was that innovation occurs when business models match up with one or more of the mass flow meter where technological advances overlap with market needs, thus resulting in growth and transformation.
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