Ten requirements for vortex flowmeter installation

Vortex flowmeters can be widely used in various large, medium and small pipelines for water supply and drainage, industrial circulation, sewage treatment, oil and chemical reagents, as well as compressed air, saturated and superheated steam, natural gas and other media flow measurement and can be used as a flow variable The transmitter is used in the automation control system, and uses EEPROM to protect the accumulated flow from power failure, and the protection time is more than 10 years. Points to note when installing vortex flowmeters: 1. Reasonably choose the installation location and environment to avoid strong power equipment, high frequency equipment, and strong power switch equipment; avoid the influence of high temperature heat sources and radiation sources, and avoid strong vibration and strong corrosion. The environment, etc., and the convenience of installation and maintenance must be considered at the same time. 2. There must be enough straight pipe sections upstream and downstream. If there are two 90° elbows on the same plane upstream of the sensor installation point, then: upstream straight pipe section ≥ 25D, downstream straight pipe section ≥ 5D if the upstream of the sensor installation point is on a different plane There are two 90° elbows, then: the upstream straight pipe section ≥ 40D, the downstream straight pipe section ≥ 5D, the regulating valve should be installed outside the 5D downstream of the sensor, if it must be installed upstream of the sensor, the upstream straight pipe section of the sensor should not be less than 50D , The downstream should be no less than 5D. 3. The piping upstream and downstream of the installation point should be concentric with the sensor, and the coaxial deviation should not be less than 0.5DN4. The pipeline should take vibration reduction measures to avoid installing the sensor on the pipeline with strong vibration, especially lateral vibration. If it is necessary to install, vibration damping measures must be taken. Pipe fastening devices should be installed at the upstream and downstream 2D u200bu200bof the sensor, and anti-vibration pads should be added. 5. Installation on a horizontal pipeline is the most common installation method for flow sensors. When measuring gas flow, if the measured gas contains a small amount of liquid, the sensor should be installed at a higher part of the pipeline. When measuring liquid flow, if the measured liquid contains a small amount of gas, the sensor should be installed at the lower part of the pipeline. 6. When the sensor is installed in the vertical pipeline to measure the gas flow, the sensor can be installed in the vertical pipeline, and the flow direction is not limited. If the measured gas contains a small amount of liquid, the gas flow direction should be from bottom to top. When measuring the liquid flow, the liquid flow direction should be from bottom to top: this will not add the weight of the liquid to the probe. 7. The sensor is installed on the side of the horizontal pipeline. No matter what kind of fluid is measured, the sensor can be installed on the horizontal pipeline, especially for measuring superheated steam, saturated steam and cryogenic liquid. If conditions permit, it is best to use side installation, so that the temperature of the fluid is The effect of the amplifier is small. 8. This installation method is generally not recommended for the inversion of the sensor in the horizontal pipeline. This installation method is not suitable for measuring general gas and superheated steam. It can be used to measure saturated steam and is suitable for measuring high-temperature liquids or situations where pipes need to be cleaned frequently. 9. When the sensor is installed on a pipeline with an insulation layer to measure high-temperature steam, the insulation layer should not exceed one-third of the height of the support at most. 10. The selection of pressure measurement point and temperature measurement point is based on measurement needs. When pressure and temperature need to be measured near the sensor, the pressure measurement point should be 3-5D downstream of the sensor, and the temperature measurement point should be 6-8D downstream of the sensor.
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