The measurement of the porous plate flow meter is not accurate, what should you do? Try these tricks!

Abstract: The measurement of the porous plate flow meter is not accurate. What should you do? Try these tricks! The information is provided to you by the excellent manufacturers of flowmeters and flowmeters. The measurement of the perforated orifice flowmeter is inaccurate. 1. The differential pressure pipeline is blocked, and the differential pressure pipeline is cleared; 2. The differential pressure gauge is faulty, check the differential pressure gauge; 3. The differential pressure transmitter shows a significant deviation, and the ruler should be checked 4. The installation direction of the throttling element is wrong, re-install the throttling element. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the measurement of the porous orifice flowmeter. What should you do? Try these tricks! Article details. The measurement of the perforated orifice flowmeter is inaccurate. 1. The differential pressure pipeline is blocked, and the differential pressure pipeline is cleared; 2. The differential pressure gauge is faulty, check the differential pressure gauge; 3. The differential pressure transmitter shows a significant deviation, and the ruler should be checked. 4. The installation direction of the throttling element is wrong, re-install the throttling element; 5. The working condition parameters of the measured medium are inconsistent with the parameters used in the design of the throttling device, and should be corrected according to the relevant formula, and the differential pressure value should be recalculated if necessary. ;6. The length of the straight pipe section before and after the throttling device is not enough, and the length of the straight pipe section should be adjusted; 7. The inner diameter of the straight pipe section is out of tolerance, the inner diameter of the straight pipe section is measured, and the maximum flow rate is recalculated; 8. The throttle aperture is out of tolerance, the measured orifice aperture is recalculated Calculate the maximum flow; 9. The throttling element is deformed, replace the throttling element; 10. There is attachment on the throttling element, clean and replace the throttling element; 11. The sharp side of the orifice plate should face the fluid flow direction as the inlet end, showing The flared side is the outlet end. If installed backwards, the display will be much smaller. Solution for perforated orifice flowmeter: Check the installation direction of the orifice plate and install the orifice plate correctly. 12. The inlet edge of the orifice plate is worn. If the orifice plate is used for a long time, especially when the measured medium is mixed with solid particles and other impurities, the geometry and size of the orifice plate will change. Or the edge of the opening becomes blunt, the measured pressure difference will become smaller, and the flow rate display will be low. Solution: Rework the orifice plate. 13. Transmitter zero drift: If it is used for a long time, the zero point of the transmitter may drift. If it is negative drift, the displayed pressure difference will decrease, and the displayed flow rate will also decrease. Solution: Correct the zero point of the transmitter. 14. The length of the upstream and downstream straight pipe sections is not enough. If the upstream and downstream straight pipe sections are not long enough, the gas will not be fully developed, which will cause large errors in the measurement results. If there are multiple elbows in the specified straight pipe section upstream, the measurement will be made. The result is low. Solution: Renovate the steam pipeline so that the length of the upstream and downstream straight pipe sections meets the specified requirements. Add a rectifier before the throttling device. 15. The three-valve group of the differential pressure transmitter leaks air. If the high-pressure valve or the balance valve in the three-valve group leaks, the measured differential pressure value will decrease, and the measurement result will be low. Solution: If the high-pressure valve in the three-valve group leaks, tighten the valve and replace it if necessary. If the balance valve in the three-valve group leaks, tighten the valve and replace it if necessary. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'The perforated orifice flow meter is not accurate in measurement, what should you do? Try these tricks! 》

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