Scale velocity-equalizing tube flowmeter installation requirements

Abstract: the scale velocity-equalizing tube flowmeter installation requirements information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. 1. Provide the correct data flow and the pipe. Differential pressure type velocity-equalizing tube flowmeter mechanical size is based on to install the pipe size tailored, its measuring range is provided according to the craft flow calculation and calibration data. Choose, be sure to provide correctly. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the installation requirement of scale velocity-equalizing tube flowmeter article details. 1. Provide the correct data flow and the pipe. Differential pressure type velocity-equalizing tube flowmeter mechanical size is based on to install the pipe size tailored, its measuring range is provided according to the craft flow calculation and calibration data. Choose, be sure to provide correct to manufacturers flow data and pipe size, pipe size including outside diameter and wall thickness. 2. Correct selection of test bar. Differential pressure type velocity-equalizing tube flowmeter its main structure is a insert test bar, it has various forms, the cross section shape is differ, there are circular tube, diamond tube, Delta form, etc. , for a variety of shape detection pole corresponding to the different fluid theory. 3. To choose high precision micro differential pressure transmitter. Differential pressure type velocity-equalizing tube flowmeter is by measuring the total static pressure to calculate flow rate, is often used in large diameter gas flow measurement, it produces the differential is generally small, perhaps only 20 - when she was a child 30 mpa, should avoid to use pressure pipe, and the use of high precision micro differential pressure transmitter, such as 3051, zui is directly adopting velocity-equalizing tube, three valve group, the integration of the differential pressure transmitter, direct installation, such not only can reduce the leak, caused by the use of lead pressure tube and can also be compensated by the change of temperature, pressure and distortion of the differential pressure signal of change. 4. The length of the guarantee of straight pipe. Differential pressure type front line velocity-equalizing tube flowmeter must ensure that there are 7 ~ 9 pipe diameters of straight pipe length, this data is the data varies, from 3 to 30 times in all, to make the large gas flow velocity in pipe axis symmetrical distributed in as far as possible, only in this way, only the flow rate of the measuring points can be calculated through the whole cross section of flow, or large gas velocity distribution in pipe will be very complicated, flow coefficient K of fluctuation will be big, can't ensure the accuracy of measurement. 5. Repeatability and accuracy. In some factories, velocity-equalizing tube flowmeter is a process, which could provide message source point detection link, it is reflected by the output of gas flow information, does not require an exact value, and should be accurate to reflect the change of flow, which requires the velocity-equalizing tube work reliable, its output and flow involuntary change relation of single value function, namely high repeatability. If straight pipe can not meet the requirements of the cases, the repeatability can be 0. 5%, and the error is likely to exceed 6%. In the automatic system for regulating and monitoring, using simple structure of the differential pressure type velocity-equalizing tube flow meter has its advantages. 6. Equipped with the necessary dust filtration unit. If the process is more special, such as dust is bigger, suggested that equipped with the necessary accessories, such as dust filtering device, ensure velocity-equalizing tube no blockage, in order to ensure the normal work of the instrument. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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