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Turbine meter body best selection using stainless steel material to corrosion, so explosion protection area must also be the result.
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Bearing generally are carbonized tungsten, ptfe, carbon graphite three specifications: tungsten carbide has the highest precision, it as a standard component of the industrial control;

Bearing's life and the square of the velocity ratio, so the velocity of the best in one third of the maximum velocity of speed is better.
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Sensing probe is detecting the movement of the rotating body and put it into digital pulse signal, the electromagnetic coil voltage output value is close to sine curve, the pulse signal frequency range with size measurement of flow into linear change, the typical range of 10:1, transcribed and 100:1 three kinds of specifications.

Electromagnetic coil resistance is generally less than 2000 & Omega;
That is greater than the value may be damaged.

The function of the temperature and pressure compensation function of the vortex flowmeter produced by Henan vortex flowmeter is a vortex flowmeter that uses the Karman vortex principle to measure flow. It is mainly used for the flow measurement of medium fluids in industrial pipelines. It can measure gas, liquid, Steam and other media. There are different types of vortex flowmeters to choose from, and the integrated vortex flowmeter with temperature and pressure compensation is also often used by customers. Due to the compressibility of the gas, its flow measurement is more complicated than that of the liquid. The output signal of the vortex flowmeter is not only related to the input signal, but also related to the gas density, and the density of the gas is temperature and pressure (referred to as temperature and pressure) The function. Therefore, the gas flow measurement generally has the problem of temperature and pressure compensation. The density of steam is not only related to temperature and pressure, but also to humidity. In recent years, new types of vortex flowmeters have emerged, making the temperature and pressure compensation of gas flow measurement simple and accurate, thereby improving the measurement accuracy. When measuring the temperature and pressure compensation vortex flowmeter, the classification of the medium: 1. When measuring the gas, the temperature and pressure need to be compensated at the same time; the gas is generally settled by the standard volume flow rate. Because the volume flow of the gas changes when the temperature or pressure changes, the flow will change. 2. When measuring superheated steam, temperature and pressure need to be compensated at the same time; steam is generally settled by mass flow. Because there is a change in either temperature or pressure, the density of the steam changes and the mass flow also changes. 3. When measuring saturated steam, single temperature compensation or single pressure compensation is required. The density of saturated steam has a fixed correspondence with temperature or pressure (saturated steam density table), knowing any of them, the density of saturated steam can be determined
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Abstract: The information on the matters needing attention for the float flow meter lined with PTFE metal tube is provided by the excellent flow meter and flow meter manufacturers and quotation manufacturers. In the initial installation, the magnetism around the lined tetrafluoro metal tube float (rotor) flowmeter and the stability of the fluid should be fully considered, and its characteristics should also be fully considered during use. Therefore, we mechanically install the metal tube rotor flow rate. The first time after counting. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the article details of the precautions for the PTFE metal tube float flowmeter. In the initial installation, the magnetism around the lined tetrafluoro metal tube float (rotor) flowmeter and the stability of the fluid should be fully considered, and its characteristics should also be fully considered during use. Therefore, we mechanically install the metal tube rotor flow rate. When using the meter for the first time, pay attention to the following points: 1. When using the tetrafluoro metal tube rotameter for the first time, after welding the butt flange between the pipeline and the metal tube rotameter, apply gas to The inside of the pipeline is purged to remove ferrous waste and other impurities in the pipeline, so as to prevent the float of the metal tube rotameter from being stuck by some impurities or ferrous impurities to affect the magnetic coupling of the metal tube rotameter during initial use. 2. When measuring liquids, when opening the front and rear valves of the metal tube rotameter, in order to avoid the sudden opening of the valve to form an instantaneous water head impact and damage the metal tube rotameter, we require that the valve should be opened slowly when opening the valve. . 3. When measuring the flow of gas medium, we require that the system pipeline should not be pressurized by means of pressurization measures before opening the valve. Otherwise, if the valve is suddenly opened, the float of the metal tube rotor flowmeter will instantly rush to the upper position of the flowmeter. It may damage the metal tube rotameter, please remember to use it! If the above situation of the metal rotor flowmeter cannot be eliminated by the user, please consult the manufacturer of the metal tube rotameter. Rotameter lined with tetrafluoro metal tube is a commonly used flow measuring instrument in the industry. It can measure gas and liquid. It adopts an all-metal structure. The measuring tube is made of 304 stainless steel or 316L stainless steel, and the interior is lined with PTFE. Strong anti-corrosion performance. The metal tube rotameter has the characteristics of small size, large measuring range and convenient use, and is especially suitable for medium flow measurement with low speed and small flow. It is precisely because of the advantages and practicability of metal tube rotameters that they are more and more widely used in the industry. I will not talk about the selection. I believe everyone can buy the most suitable flowmeter model. Today, I mainly talk about the installation. Pay attention to the installation specifications and the installation matters of the rotor flowmeter lined with PTFE metal tube: (1) The flowmeter must be installed vertically, the fluid measured by the flowmeter passes through the flowmeter from bottom to top, and the inlet and outlet are guaranteed to be 5 times the diameter of the instrument For the newly installed pipeline, the pipeline should be flushed before the flowmeter is installed. (2) In order to facilitate the maintenance and replacement of the flowmeter, the bypass pipeline should be connected when the instrument is installed. (3) A valve should be installed upstream of the flow meter, and a flow regulating valve should be installed downstream of 5 to 10 times the diameter of the meter. For small-diameter instruments, a filter should be installed upstream. If the measured medium contains magnetic substances, a magnetic filter should be installed in front of the flowmeter. (4) When the measured medium is dirty, the tube and float should be cleaned in time. (5) The measurement accuracy of the metal rotor flowmeter is generally 2.5 or 1.5. When the measurement accuracy is required to be high, the metal rotor flowmeter should not be selected. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Precautions for Float Flow Meters Lined with PTFE Metal Tubes'
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Abstract: The information on the precautions for the use of the rotary cup flowmeter is provided by the excellent flowmeter and flowmeter manufacturers. Careful use and careful maintenance can ensure that the flow meter works properly and obtains reliable hydrological data. To this end, the following regulations should be noted: 1. The instrument and all accessories should be placed in the instrument case and stored in a wooden cabinet in a dry and ventilated room. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following are the details of the article on the precautions for the use of rotary cup flowmeters. Careful use and careful maintenance can ensure that the flow meter works properly and obtains reliable hydrological data. To this end, the following regulations should be noted: 1. The instrument and all accessories should be placed in the instrument case and stored in a wooden cabinet in a dry and ventilated room. 2. Before disassembling and washing the instrument, you must be familiar with the structure of the instrument and the method of disassembling and washing. 3. All parts of the instrument can not collide arbitrarily, especially the rotating cup, rotating shaft, yoke and so on. 4. The thimble, top socket, steel ball and other parts that are easy to rust must be frequently added with instrument oil for protection. 5. The head oil chamber must be filled with instrument oil before use. After a certain period of continuous use, the oil storage must be checked. The specific time can be determined experimentally according to the local river characteristics (flow rate, sediment content and water depth). 6. The instrument oil adopts No. 8 instrument oil (GB487). Substitute oils are 25 or 104 to 6 cups of time. This can ensure good contact, clear and stable signal, and at the same time ensure the rotation sensitivity of the rotary cup. Install the counter and turn the rotary cup. At this time, the counter should transmit a signal every 5 times, and the signal should be uniform, clear and stable. The reasons for the failure are as follows: (1) Oxidation layer (burning black), patina or breaking occurs on the contact wire due to too strong current, too long energization time, or too long storage and use time. The former can be used to remove the oxide layer or patina with a sharp knife or fine sandpaper, and the latter should be replaced with a new one. (2) Due to the long use time, the contact wire has residual deformation, resulting in poor contact and unstable signal, which can be adjusted with tweezers. (3) Because the contact wire is pressed too tightly, the signal time is too long and the rotation sensitivity is poor, which can be adjusted with tweezers. (4) Due to the rotation of the transmission mechanism, the contact wire is twisted and twisted, which can be removed and adjusted, and then re-installed. The repair steps are: loosen the upper yoke top screw and remove the eccentric cylinder. (2) Lay the eccentric cylinder flat on the table, open the side cover, unscrew the gear shaft screw, and take out the gear and washer. (3) Unscrew the anti-drop screw. (4) Unscrew the thread crimping nut. (5) Loosen the small hexagon nut and the compression nut with a three-way wrench. (6) Pull out the conduction mechanism from the eccentric cylinder. (7) Use a clock driver to unscrew the set screw that presses the contact wire. (8) Repair according to the cause of the above failure. If it cannot be repaired, take out a new contact wire from the finger bottle and replace it. (9) Fix the contact wire with the set screw and apply butter to the head of the set screw. (10) Install the set of parts back to the eccentric cylinder in the corresponding order [(6) to (3)] above. When installing, it should be noted that the contact wire should be located just above the contact claw of the gear. If the position is incorrect, it should be removed and re-installed. (11) Reinstall the washer, gear and gear screw. (12) Test according to the aforementioned technical requirements, and adjust the contact condition of the contact wire. (13) Back up the side cover and screw it tightly. 3. Counting equipment Check according to the instruction manual of the counter. After the above tests have proved that the work of each part is indeed reliable, the indoor preparations are over. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Precautions for the use of rotary cup flowmeter'
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Abstract: The application of single-chip microcomputer in the compensation of the flow meter of saturated steam The information is provided by the excellent flow meter and flow meter manufacturers and quotation manufacturers. Abstract: This study is aimed at this situation, using MCS-51 single chip, taking the boiler saturated steam flow as the object, to carry out the density compensation of flow measurement. In this study, based on the traditional fluid metering compensation idea, the temperature change value and the density change value are calculated. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the application of single-chip microcomputer in the measurement and compensation of saturated steam flowmeter. This study is aimed at this situation, using MCS-51 microcontroller, taking the boiler saturated steam flow as the object, to carry out the density compensation of flow measurement. In this study, based on the traditional fluid metering compensation idea, curve fitting is performed between the temperature change value and the density change value, and a single mathematical model is used for the traditional flowmeter compensation method, so that when the operating conditions change in a large range, the compensated flowmeter The accuracy of the flow rate can not meet the requirements, a method of flow compensation by piecewise fitting is proposed. And the idea of ​​smart meter is introduced into compensation technology, using MCS-51 single-chip microcomputer for data processing, using the strong storage capacity and fast computing power of single-chip microcomputer, not only improves the accuracy of compensation, but also reduces the cost of the compensation device, which is simple, flexible, and convenient. master. At the same time, the coefficient of the fitting curve is read in the form of a look-up table in the programming of the program, so that when the coefficient is changed or used for other similar compensation applications, only the corresponding value in the table needs to be changed without the need for major changes in the program. Change, more flexible and has a certain generality. Introduction The detection and control of fluid flow is an important basis for all walks of life to strengthen energy and material management, economic analysis, settlement and decision-making. It is also an important means to monitor the production process to maintain quality, safety, improve efficiency and improve the environment. Although there are dozens of current flow meters, compensation measures are often used for higher and higher measurement accuracy. If a differential pressure flowmeter is used to detect the flow of saturated steam, the design pressure is 0.5MPa. When the steam pressure changes to 1.0MPa, the flow error is about -26%. The greater the variation of the working conditions, the greater the error introduced. Therefore, compensation measures must be adopted in some occasions where precise measurement is required or the working condition fluctuates widely and frequently. Fluid metering compensation technology is a correction method established for different flow meters to detect different fluids. With the advancement of automation technology and the emergence of computers and other intelligent devices, the technical tools for automatic compensation have become more and more perfect, but the process of establishing the mathematical model of fluid metering compensation is not fully considered, and the accuracy of metering is still not high. 1. Flow measurement of saturated steam and its compensation Differential pressure flowmeter is the main instrument for measuring saturated steam at present. Its scale equation is as follows: In the formula: M——Mass flow of saturated steam, kg/h;α0——Flow coefficient determined according to design conditions; ε——Gas expansion coefficient determined according to design conditions;γRe——The correction coefficient of the inner wall roughness of the pipe determined according to the design conditions; d——Diameter of orifice plate at design temperature, mm; Δp——Differential pressure before and after the orifice plate, Pa;ρs——Density of saturated steam under design conditions, kg/m3. After the flowmeter is installed,α0, ε andγRe and d are fixed values. When the operating conditions (pressure or temperature) of the steam change, let the steam density at this time beρ, if the differential pressure before and after the orifice remains unchanged, it is still Δp, and the flow becomes M. Formula (1) and (2) are simultaneously combined, then formula (3) is based on the density parameter to compensate the flow, and the steam flow is calculated. Density compensation must detect the density of saturated steam at any time. At present, there is no stereotyped density meter for detecting saturated density. In engineering, the characteristics of the one-to-one correspondence between the saturated steam density and the absolute pressure of the steam or the working temperature of the steam are used to pass the pressure or temperature. The parameter indirectly corrects the indication value of the flowmeter. 2. Calculation formulas for thermodynamic properties of saturated steam commonly used in engineering In order to meet the development needs of automatic compensation technology, it is necessary to formulate the thermodynamic properties of steam. The following are the calculation formulas for thermodynamic properties of saturated steam commonly used in engineering.
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