Installation requirements for the average velocity tube flow meter

Abstract: The information on the installation requirements of the average velocity tube flowmeter is provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. 1. Provide correct flow and pipeline data. The mechanical size of the differential pressure equalizing tube flowmeter is tailored according to the size of the pipeline to be installed, and its measurement range is calculated and calibrated according to the flow data provided by the process. When choosing, be sure to provide it correctly. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. 1. Provide correct flow and pipeline data. The mechanical size of the differential pressure equalizing tube flowmeter is tailored according to the size of the pipeline to be installed, and its measurement range is calculated and calibrated according to the flow data provided by the process. When selecting, be sure to correctly provide the manufacturer with flow data and pipe dimensions, including outside diameter and wall thickness. 2. Correctly select the detection rod. The main structure of the differential pressure equalizing tube flowmeter is an inserted detection rod. It has various forms and different cross-sectional shapes, such as round tube, diamond tube, Delta shape, etc. Because the detection rods of various shapes correspond to 3. To choose a high-precision differential pressure transmitter. Differential pressure equalizing tube flowmeter calculates the flow by measuring the total static pressure. It is often used to measure the flow of large-diameter gas. The differential pressure generated by it is generally relatively small, and it may only be 20-30 Pa when it is small. For the pressure pipe, use a high-precision differential pressure transmitter, such as 3051, etc. The most direct solution is to use the direct installation method integrating the uniform velocity pipe, the three-valve group and the differential pressure transmitter, which can not only reduce the use of lead The leakage caused by the pressure pipe can also compensate for the distortion of the differential pressure signal due to changes in temperature and pressure. 4. Ensure a certain length of straight pipe section. The front pipeline of the differential pressure uniform velocity tube flowmeter must ensure that there is a straight pipeline length of 7 to 9 times the diameter of the pipeline. This data varies from 3 times to 30 times, so that the flow rate of the gas in the large pipeline can be maximized. Symmetrically distributed on the axis, only in this way, the flow rate through the entire section can be calculated by measuring the flow velocity at a few points. Otherwise, the flow velocity distribution of the gas in the large pipeline will be very complicated, and the fluctuation of the flow coefficient K will be large, and the measurement cannot be guaranteed. accuracy. 5. Repeatability and precision. In some factories, the uniform velocity tube flowmeter is only a detection link that provides an information source at a certain process point. The gas flow information reflected by its output does not require an exact value, but should accurately reflect the flow. Change, which requires the uniform velocity tube to work reliably, and the single-valued function relationship between its output and the flow rate does not change randomly, that is, the repeatability is high. If the straight pipe section does not meet the requirements, the repeatability can be 0.5%, and the error may exceed 6%. As adjustment and monitoring in the automation system, it has its advantages to use a differential pressure equalizing tube flowmeter with a simple structure. 6. Install the necessary dust filter device. If the process is special, such as large dust, it is recommended to install necessary auxiliary equipment, such as dust filter device, etc., to ensure that the uniform velocity tube is not blocked, so as to ensure the normal operation of the instrument. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Installation Requirements for Velocity Tube Flow Meters'

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