Advantages and disadvantages of V cone flow meter products

Abstract: The advantages and disadvantages of V-cone flowmeter products are provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Jiangsu Runyi specializes in the production of V-cone flowmeters, orifice flowmeters, Verabar flowmeters, electromagnetic flowmeters, vortex flowmeters, metal rotor flowmeters, etc. The products have high precision, good stability, and low pressure loss. Buy it! What are the advantages and disadvantages of V-cone flowmeter? More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following are the details of the advantages and disadvantages of V-cone flowmeter products. Specializing in the production of V-cone flowmeters, orifice flowmeters, Verabar flowmeters, electromagnetic flowmeters, vortex flowmeters, metal rotor flowmeters, etc. The products have high precision, good stability, and low pressure loss. Buy! What are the advantages and disadvantages of V-cone flowmeter? Let's tell you. The advantages of a V-cone flowmeter: 1. McCrometer, the earliest manufacturer of V-cone with a wide range ratio, carried out a series of testing and research work, and came to the conclusion: V-cone Compared with the well plate, the signal-to-noise ratio of the V-cone is much lower. Due to the small signal-to-noise ratio, the V-cone can accurately measure even the measured differential pressure under small conditions when measuring small flow rates. Therefore, it is not necessary to improve the influence of signal noise by increasing the damping of the transmitter like the orifice plate. Because of this, the turndown ratio of the V-cone is much larger than that of the orifice plate. Prof. S N Singh from the Indian Institute of Technology conducted experiments at different Reynolds numbers using oil and water respectively, and concluded that the outflow coefficient of the V-cone is almost independent of the Reynolds number within a certain measurement range. The author has also participated in the calibration of hundreds of V-cone flowmeters. It can be seen from the data that generally within the accuracy range of 1.0, using a single differential pressure transmitter, the range ratio of the V-cone can reach 10. .. 1. 2. The straight pipe section requires the self-rectification function of the low V cone to make the straight pipe section lower than the orifice plate. Professor S N Singh from the Indian Institute of Technology used oil and water respectively, and placed valves with different opening degrees at different upstream positions to test, and finally came to the conclusion: If the upstream disturbance occurs 10D upstream of the V-cone flowmeter, or Farther away, this asymmetric velocity distribution will not affect the value of the outflow coefficient, which will remain at the same value obtained under ideal conditions; if the upstream disturbance source is located less than 10D from the V-cone flowmeter (e.g. 5D ), the maximum variation of the outflow coefficient is 6%. It can be seen that as long as there is a 10D straight pipe section in front of the V cone, no matter what kind of throttling part there is in front, it will not affect its measurement. However, the requirements for the straight pipe section of the orifice plate specified in ISO-5167 vary greatly according to the different front throttling parts, and generally at least 20D is required. For example, the gas outlet of the above test separator generally adopts 4"For the V-cone, only a 1m straight pipe section is required in front of it, and a 0.5m straight pipe section in the back. 3. Small pressure loss Pressure loss is the irrecoverable pressure, which is one of the important indicators to be considered when selecting a flowmeter. In today's energy-deficient society, which advocates energy conservation and emission reduction, this parameter is particularly important. Since the shape of the edge of the V-cone determines the flow state of the fluid, the pressure loss of the fluid is much smaller than when using an orifice plate. Moreover, due to the self-rectification function of the V cone, there is no need to add a rectifier in front of it, while the orifice plate requires a long straight pipe section to adjust the flow state of the fluid. The space on the offshore oil platform is small, and the land is expensive. It is difficult to meet the requirements of the straight pipe section. It is often necessary to increase the rectifier to ensure the flow state of the medium. However, the disadvantage of the high voltage loss of the rectifier is that it consumes more energy. Even if the rectifier is not considered, the pressure loss of the V-cone is generally only 1/2~1/3 of the orifice plate under the same amount. 4. High precision Because the V-cone structure has no moving parts, the V-cone has a good Repeatability, generally less than 0.1%. Due to its wide turndown ratio, that is, its linearity is good, its precision is high. According to GB17167-2006.. General Rules for the Equipping and Management of Energy Measuring Instruments for Energy-using Units.. Regulations, the accuracy level requirements of flow meters used for energy measurement are: gas and natural gas are 2.0. Therefore, in the gas measurement at the outlet of the test separator, within the range of 10..1, the overall error of the V cone plus the differential pressure transmitter and the secondary meter will not be lower than 1.5, which can fully meet the measurement requirements. Require. 5. Good long-term performance Because the contour shape of the cone restricts the flow of the medium, the fluid forms a boundary layer along the cone, which means that the edge of the cone is not easily worn by unclean fluids, thus making the opening ratio .. remain unchanged, allowing the flowmeter to maintain accuracy over a long period of time without having to be calibrated. 2. Disadvantages of V-cone flowmeter: 1. The orifice plate that needs to be calibrated is a flowmeter that can ensure its measurement accuracy by ensuring the geometric size. The V-cone is a new type of flowmeter. Although many manufacturers and researchers have done a lot of experiments, the national standards that the V-cone flowmeter can be based on are limited so far. The available literature on the structural design of cone flowmeters is scarce. Each manufacturer produces according to the enterprise standard. It can be said that the products are mixed, and not every manufacturer's products are reliable. Due to insufficient test data, each V-cone flowmeter must be strictly calibrated before leaving the factory. This also increases its cost.

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