Flow meter manufacturer from China（Kaifeng AFT Instrument Co.,ltd)

On November 29, 2018, our company personnel actively participated in the 2018 (Henan) orientation & training on UN Procurement.        At the meeting, it talked about the birth of the United Nations, the role of the United Nations, the process of China’s accession to the United Nations, the status and role of China in the United Nations, and the procurement needs and procurement processes of the United Nations，etc.It was also mentioned that the United Nations has a great demand for rescue equipment (such as tents) and instrumentation equipment (such as flow meters). And after the meeting, the spirit of the meeting was conveyed to the whole company. Please visit our website to learn more news: www.aft-flowmeter.com www.aft-instruments.com

    Corrosion is a phenomenon in which a metal is destroyed by chemical action in its environment. The corrosive nature of the media is a serious threat to the flow meter, and only a few flow meters are not subject to corrosive effects.     a.Corrosive media corrode and damage critical parts of the flow meter that are in direct contact with the media.For example, the electromagnetic flow meter electrode causes leakage of the medium due to corrosion, causing the excitation coil to burn out.      b.The critical components of the flow meter are subject to corrosion by corrosive media for a long time, changing the geometry, resulting in reduced accuracy of the meter.For example, after the rotor of the rotameter is corroded by the fluid, the outer shape becomes small, resulting in a low indication of the flow meter.      c.Reduce the life of the flow meter.      d.Corrosive media leakage, if not found in time and timely treatme...

       The measurement of gas flow mainly refers to the measurement of the flow rate of city gas, natural gas, air duct, boiler and various furnace flue gas, flare gas in petroleum refinery and petrochemical industry. The measurement of these flows is important for economic combustion, environmental protection, and trade settlement.       The characteristics of gas flow measurement：       a.Large calibers, straight sections are often difficult to guarantee.       b.Low static pressure, low flow rate, only a small pressure loss is allowed.       c.The flow rate range varies greatly, requiring a large range of gauges.       d.The fluid contains dust and sometimes contains sticky notes of tears.       e.Some fluids are somewhat corrosive.       f.The composition of the gas varies.       g.The fluid temperature is high.       h.Some flue ...

Electromagnetic flowmeter plays an extremely important role in the measurement of large diameter water flow because of the following characteristics of the instrument. a.No moving parts, high reliability, long-term stability b.No additional resistance. This is especially important for large diameter flow meters. c.The accuracy of measurement is high.When typical products are v=1m/s, the accuracy can reach ±0.3%R or even ±0.2%R.  d.The range is wide.The range of accuracy is guaranteed to be 40:1 and the measurable range is 200:1. e.Straight pipe requirements are relatively low. This is also important for large diameter pipes. There are a variety of flowmeters that require a straight pipe length of 30D. For pipes with a pipe diameter of 1 m or more, it means that a straight pipe section of 30 m or more is necessary, which is difficult to satisfy in most cases. f.There are large diameter products. The largest domestic DN3000 product is available to meet the needs of large-caliber wate...

①There are many kinds of instruments that can be used to measure small flow. The common feature is that the small diameter is easy to be blocked by impurities in the fluid. Therefore, the filter needs to be installed before the flow meter.     ②Calibration is easy.     Due to the small flow measurement range, it is easy to perform off-line calibration or online calibration of the flowmeter in the laboratory. Especially the float flowmeter and the thermal flowmeter.     ③Do not care about pressure loss.     In the measurement of small flow rate, the user generally does not mention the requirement of “the pressure loss is as small as possible”. Therefore, in calculating the opening diameter of the orifice plate, in order to improve the accuracy, a higher differential pressure upper limit is often allowed within the range of the allowable pressure loss. value.    ④Various common instruments are selected for comparison.     Glass t...

     On November 9, 2018, Japanese customers visited our factory accompanied by sales managers and technical engineers.      We warmly welcome the visiting customers and give the customers a detailed introduction to the company background, development history, application cases and so on.Then we took the customer to visit our flowmeter exhibition hall and flowmeter production workshop.The customer was very interested in the production process of vortex flow meter and large-caliber electromagnetic flow meter，and the working principle and flow calculation formula of vortex flow meter and electromagnetic flow meter are inquired in detail. Then we took a group photo. The customer stated that she was very happy during the visit to our factory and expressed satisfaction with our reception.    I look forward to more cooperation between the two sides in the future.

  The volumetric flowmeter has unique advantages in petroleum metering. The key reason is the lubrication of the fluid itself, which enables the instrument to operate in a long-term and stable manner with high precision and a large range.      The following points should be noted in the selection and use of positive displacement flowmeters.      a.Accuracy is related to the fluid range.      Accuracy is related to the fluid range. If the same meter has a higher rated accuracy level, it can only be obtained in a lower range. If you want a larger range, you must lower the accuracy level.      b.Liquid viscosity has a certain influence on the measurement error.       Viscosity has less effect than turbine flowmeters, but it still introduces errors.     c.Different types of instruments have large differences in the applicable viscosity range.      Volumetric flowmeters for oil ...

In recent years, ultrasonic flow measurement technology has developed quite maturely, and the price is also decreasing. Its outstanding advantages and application fields are mainly reflected in the following aspects.      The ultrasonic flow sensor can not directly contact the measured medium, and the high pressure of the fluid, the inclusion of more impurities, and the harsh conditions such as easy solidification and easy crystallization do not pose a threat to the flowmeter. In recent years, ultrasonic flowmeters have been widely used in the measurement of gasoline and fuel flow.      Although the clamping ultrasonic flowmeter is not accurate, it is easy to install and is often used for flow monitoring and process control.In recent years, some companies have introduced multi-channel ultrasonic flowmeters with an accuracy of ±0.5% R. Some apply to gases, some apply to clean liquids,can be used for trade transfer.      In the application of u...

 Turbine flowmeters are widely used in oil flow measurement.This is mainly because oil itself is a good lubricant. It can lubricate shafts and bearings well during flow measurement, which is beneficial to long-term reliable operation of the instrument. a.Advantages High precision, for liquids, domestic products can achieve ± (0.2-0.5)% R, and some foreign products can reach ± 0.15% R. Good repeatability, short-term repeatability of up to 0.05%, such as frequent calibration, can get very high accuracy, can achieve the desired effect in quantitative operation. Output pulse frequency signal, in the signal processing connected with batch controller and flow meter,can achieve basically no error. Wide range, the ratio of maximum flow to minimum flow can reach 6:1-10:1 Small inertia, fast response, time constant is 1-50ms Simple structure, convenient installation and maintenance, large circulation capacity.If a failure occurs, it does not affect the transport of liquid in the pipel...

  Compressed air is an important secondary energy source for public utilities, and most of it is converted from electrical energy or thermal energy through a compressor. When the air pressure value is lower, it is generated by the blower.      （1） Characteristics of compressed air flow measurement       ①The vibration is large.      Air flow meters installed in compression plants and blower rooms must consider vibration issues.This vibration is mainly from the compressor and the blower, and the vibration of the machine can be transmitted to a long distance through the air duct or duct. Among them, the largest vibration is the reciprocating compressor. The vibration generated by the large reciprocating compressor during operation often drives the plant and the surrounding ground to vibrate together, posing a threat to the accurate and reliable operation of the relevant air flow meter.  It triggers the fulcrum movement ...