Discussion on whether liquid turbine flowmeters will reverse metering

Henan Bo Rui Instrument Co., Ltd. is a professional manufacturer and supplier of flow meters, including electromagnetic flowmeters, vortex flowmeters, and turbine flowmeters. We welcome both new and existing customers to contact us for negotiations. For more information, please call our service hotline: 18638176136. For more updates, visit: http:// **Discussion on Whether Liquid Turbine Flowmeters Can Reverse Metering** At a customer site, a tank was being monitored, and it was recommended to use a liquid turbine flowmeter. However, the customer reported that during the initial metering process, there would be a vacuum phase, causing negative pressure. This might lead to reverse flow, resulting in inaccurate readings or even reversed metering. In response to this situation, we discussed with our technical team and reached the following conclusions: First, from a theoretical perspective, the liquid turbine flowmeter operates by having fluid pass through the sensor housing. The blades of the impeller are angled relative to the flow direction, so the momentum of the fluid causes the impeller to rotate after overcoming friction and resistance. Once the torque is balanced, the speed stabilizes. Under certain conditions, the rotational speed is proportional to the flow rate. The rotating blade, which is magnetically conductive, cuts through the magnetic field created by the detector (a permanent magnet and coil), inducing an electric pulse signal. This signal is amplified and shaped into a rectangular pulse, which is then transmitted to the display instrument to show either the instantaneous or total flow. Unlike electromagnetic or ultrasonic flowmeters, which can detect both flow rate and direction, the turbine flowmeter only generates a pulse signal and does not distinguish the direction of flow. Therefore, it cannot display negative values when the flow reverses. Second, the impeller of the turbine flowmeter is designed symmetrically on both sides. Although it functions similarly to a household fan, the design of the impeller and its bearings ensures that it rotates regardless of the flow direction. There is no significant difference in structure between the forward and reverse rotation parts. Third, while the theoretical principles hold true, in real-world applications, reverse flow can cause issues such as reduced accuracy and shortened service life. Additionally, cumulative reverse readings may complicate metering accuracy. Fourth, we recommend installing a check valve at the outlet of the pipeline to prevent backflow. Alternatively, a clamp-type turbine flowmeter that is easy to remove and reinstall could also be considered. The above discussion was summarized by the technical department of Henan Bo Rui Instrument Co., Ltd. Please cite the source if you reference this content. If you have any questions, feel free to contact us directly. **About Henan Bo Rui Instrument Co., Ltd.** Henan Bo Rui Instrument is a leading manufacturer and seller of industrial instrumentation. We provide a wide range of products, including electromagnetic flowmeters, vortex flowmeters, turbine flowmeters, throttling devices, ultrasonic level gauges, magnetic flap level meters, radar level gauges, pressure transmitters, temperature instruments, and more. We also offer automation control engineering solutions and represent international brand instruments. With high-quality products and comprehensive after-sales service, we welcome all new and returning customers to visit and cooperate with us. For more exciting news and updates, please check out our latest articles on electromagnetic flowmeters and other related topics. **Keywords:** Vortex flowmeter; Electromagnetic flowmeter; Turbine flowmeter **Source:** http://Henan Bo Rui Instrument Co., Ltd. **National Free Service Hotline:** Hotline: 18538000788 Tel: [Phone number] Fax: [Fax number] QQ: 1815002922 Company Name: Henan Bo Rui Instrument Co., Ltd. Homepage: http:// Email: [email protected] Zip Code: 450045 Address: No. 159, Huayuan Road, Jinshui District, Zhengzhou City, Henan Province For more detailed information, visit: Http://news.chinawj.com.cn Image: Submission:

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