Selection method of differential pressure value of V-cone flowmeter and orifice flowmeter

Abstract: The information on the selection method of the differential pressure value of the V-cone flowmeter and the orifice flowmeter is provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Jiangsu Jinhu Xudong Instrument Factory is an early manufacturer of V-cone flowmeters in China. The Xudong V-cone flowmeters produced are of high quality and excellent performance, and are widely used in many domestic industrial sites. A V-cone flowmeter is a node created in the flow field using a V-cone. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following are the details of the article on the selection method of differential pressure values ​​for V-cone flowmeters and orifice flowmeters. Jinhu Xudong Instrument Factory is the earliest manufacturer in China to develop and produce V-cone flowmeters. The Xudong V-cone flowmeters produced are of high quality and excellent performance, and are widely used in many domestic industrial sites. The V-cone flowmeter uses the throttling effect produced by the V-cone in the flow field to measure the flow by detecting the upstream and downstream pressure difference. Compared with ordinary throttling parts, it changes the throttling layout, from central hole throttling to annular throttling. Practical use has proved that compared with other flow meters, the V-cone flowmeter has the advantages of high long-term accuracy, good stability, small installation conditions, wear resistance, wide measurement range, small pressure loss, and suitable for dirty media. Moreover, the V-cone itself acts as a rectifier of the flow field and becomes an excellent new type of flowmeter with unique performance. A V-cone flowmeter composed of a V-cone sensor and a differential pressure transmitter can accurately measure a wide Reynolds number (8×103≤Re≤5×107) The flow of various media within the range. The integrated orifice flowmeter is a differential pressure generating device for measuring flow. It can measure the flow of various fluids in the pipeline with various differential pressure gauges or differential pressure transmitters. The throttling device includes an annular chamber orifice, a nozzle, and the like. The throttling device is used together with the differential pressure transmitter to measure the flow of liquid, steam and gas. It is widely used in petroleum, chemical, metallurgy, electric power, light industry and other departments. Manufacturers of throttling devices all know that when calculating the opening diameter of throttling devices such as orifice flowmeters and V-cone flowmeters according to field parameters, such a problem will be involved, which is the maximum differential pressure of the differential pressure transmitter. How to choose the value? How to choose the differential pressure value and how big should it be? It is related to many factors, such as: uncertainty, front and rear straight pipe sections, etc. Therefore, when calculating the opening diameter of the orifice flowmeter and V-cone flowmeter, you must not blindly select a large differential pressure, but comprehensively consider some relevant factors. 1. When the differential pressure value is large, the required minimum straight pipe section can be shorter. In view of this feature, for the orifice flowmeter, considering various economic factors, the opening value with the largest differential pressure should be selected; while the V-cone flowmeter is relatively better, if the field fluid is Newtonian fluid, itself The requirements for the straight pipe section of the V-cone flowmeter are relatively low, even if it is shorter, it does not exist in comparison. 2. When the differential pressure value is large,βThe smaller the value, the smaller the recommended minimum Reynolds number. In this case, the actual Reynolds number may be much larger than the recommended Reynolds number, so the flow coefficient tends to be stable and the measurement accuracy is improved. 3. For the differential pressure transmitter, a larger differential pressure is more stable than a small differential pressure. 4. The above basically introduces the advantages of selecting a large differential pressure, but it will bring some disadvantages when it develops to a certain extent. Those who are familiar with the processing technology of orifice flowmeter and V-cone flowmeter should know that when the differential pressure is too large, the direct consequence is that the opening becomes very small, then the pressure loss is relatively large, and the orifice plate The pressure loss of the flowmeter is very large. If this is added, the cost due to this pressure loss is quite considerable for the entire process system; compared with the V-cone flowmeter, it is slightly moderate. Therefore, in the process of producing V-cone flowmeters, our Xudong Instrument Factory does not blindly suggest that our users choose a large differential pressure value, but is truly responsible for customers and enterprises. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Differential pressure value selection method for V-cone flow meter and orifice flow meter'

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