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Ten precautions before installing a orifice plate flow meter

2020-03-27 View Original

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1. Before installing the orifice plate flow meter, the process pipeline should be purged to prevent ferromagnetic substances remaining in the pipeline from adhering to the instrument, which could affect its performance or even damage it. If unavoidable, a magnetic filter should be installed at the inlet of the instrument. The instrument itself does not participate in the purging before commissioning to avoid damage to it. 2. Before installing the instrument in the process pipeline, it should be checked for any damage. 3. The installation style of instruments can be vertical or horizontal; in the case of vertical installation, it is necessary to ensure that the angle between the instrument’s central vertical line and the plumb line is less than 2° ; If installed horizontally, the angle between the horizontal center line of the instrument and the horizontal line should be less than 2°. 4. The upstream and downstream pipes of the orifice flow meter should have the same diameter as that of the meter; the connection flanges or threads must match those of the meter. The length of the straight pipe section upstream of the meter should be at least 5 times the meter’s nominal diameter, while the length of the straight pipe section downstream should be 250 mm or more. 5. Since the instrument transmits signals through magnetic coupling, in order to ensure its performance, no ferromagnetic materials are allowed to be present within at least 250 px around the installation site. 6. Instruments for measuring gases are calibrated at a specific pressure; if the gas is released directly into the atmosphere at the outlet of the instrument, what will happen? A pressure drop occurs at the float, causing data distortion. Under such operating conditions, a valve should be installed at the outlet of the instrument. 7. Orifice flow meters installed in pipelines should not be subjected to stress; the inlet and outlet of the instrument should have appropriate pipeline support to keep the instrument in a state of minimal stress. 8. Special care must be taken when installing instruments with PTFE (polytetrafluoroethylene) linings. Since PTFE deforms under pressure, the flange nuts should not be tightened excessively. 9. For instruments equipped with LCD displays, try to avoid direct sunlight on the display during installation to extend the lifespan of the LCD. 10. When measuring low-temperature media, a jacketed type should be selected. For more information, please visit the company’s official website at http://www.yb1518.com/. Please keep this link when reproducing the content! http://www.yb1518.com/UploadFiles/2012118173632146.jpg

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