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Ten requirements for the installation of vortex flowmeters

2020-03-03View Original

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  Vortex flow meters can be widely used for measuring the flow rate of various media in large, medium, and small-sized pipelines, including water supply and drainage systems, industrial circulation processes, sewage treatment systems, as well as oils and chemical reagents, compressed air, saturated and superheated steam, and natural gas. They can also function as flow transmitters in automated control systems. EEPROM is employed to provide power-loss protection for the accumulated flow data, with a protection duration of over 10 years. Key points to note when installing vortex flowmeters: 1. Select the installation location and environment appropriately. Avoid areas with strong electrical equipment, high-frequency devices, and powerful power switching equipment ; Avoid exposure to high-temperature heat sources and radiation sources, as well as areas with severe vibrations and highly corrosive environments; at the same time, consider the convenience of installation and maintenance. 2. There must be sufficient straight sections upstream and downstream. If there are two 90° elbows on the same plane upstream of the vortex flowmeter sensor, then the upstream straight section should be ≥25D, and the downstream straight section should be ≥5D. If there are two 90° elbows on different planes upstream of the sensor, then the upstream straight section should be ≥40D, with the downstream straight section being ≥5D. The control valve should be installed at a distance of 5D downstream of the sensor; if it must be installed upstream of the sensor, then the upstream straight section should be at least 50D long, and the downstream straight section should be at least 5D long. 3. The piping upstream and downstream of the installation point should be concentric with the sensor; the coaxial deviation should be no less than 0.5DN. 4. Vibration reduction measures should be applied to the pipes. The vortex flowmeter sensor should be installed as far as possible away from pipes subject to strong vibrations, especially lateral vibrations. If installation is unavoidable, vibration reduction measures must be taken: pipe fastening devices should be installed at 2D positions upstream and downstream of the sensor, along with vibration damping pads. 5. Installation on horizontal pipes is the most common method for installing flow sensors.   When measuring gas flow, if the gas under measurement contains a small amount of liquid, the sensor should be installed at a higher position in the pipeline. When measuring liquid flow, if the liquid being measured contains a small amount of gas, the sensor should be installed at a lower position in the pipeline. 6. Installation of sensors in vertical pipes When measuring gas flow, sensors can be installed in vertical pipes, with no restriction on the flow direction. If the gas to be measured contains a small amount of liquid, the gas flow should be from bottom to top.   When measuring liquid flow, the flow direction of the liquid should be from bottom to top: this prevents the weight of the liquid from being added additionally to the probe. 7. Side mounting of the sensor in horizontal pipes  Regardless of the type of fluid being measured, the sensor can be mounted on the side of horizontal pipes. This is especially true when measuring superheated steam, saturated steam, and low-temperature liquids. If conditions permit, side mounting is the preferred option, as it reduces the impact of the fluid’s temperature on the amplifier. 8. Inverted installation of sensors in horizontal pipes This installation method is generally not recommended. This installation method is not suitable for measuring ordinary gases or superheated steam. It can be used to measure saturated steam, and is suitable for measuring high-temperature liquids or in situations where the pipes need to be cleaned frequently. 9. Installation of vortex flowmeter sensors in pipes with insulation layers When measuring high-temperature steam, the thickness of the insulation layer shall not exceed one-third of the height of the support. 10. Selection of pressure and temperature measurement points   Based on the measurement requirements, when it is necessary to measure pressure and temperature near the sensor, the pressure measurement point should be located 3–5D downstream of the sensor, while the temperature measurement point should be located 6–8D downstream of the sensor. For more information, please visit the company’s official website at http://www.yb1518.com/. Please retain this link when reproducing the content! http://www.yb1518.com/UploadFiles/20175239314754.jpg

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