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What aspects should be paid attention to when installing a vortex flowmeter?
1: Effective measures should be taken for on-site environment and vibration: The ambient temperature of the vortex flowmeter is -40 ℃ ≤ T ≤ 55 ℃. If it is exposed to thermal radiation from production equipment, insulation and ventilation measures should be taken. Environmental air: Flow meters should not be installed in environments containing corrosive gases. If installation is necessary, ventilation measures must be taken. Mechanical vibration and impact: Vibration can generate interference signals. If the vibration and impact on the pipeline are strong and the medium flow rate is low, it may cause the interference signal to be greater than the flow signal, resulting in measurement hood noise errors. Therefore, the flowmeter should be installed in a place with low vibration and impact, and the installation position should be at a vibration frequency of 5-20Hz. The vibration acceleration should not exceed 1g, otherwise vibration reduction measures should be taken. 2： Installation point and straight pipe section requirements: Within the specified length of the straight pipe section, the inlet and outlet sections of the pipeline should be visually straight, and sensors should be avoided from being installed downstream of regulating valves or semi open gate valves as much as possible. Generally, sensors should not be installed after expanding the pipe. The sensor can be installed vertically, at any angle, but when installed vertically or obliquely, the fluid flow direction should be from bottom to top. The setting of pressure points and measurement points should be outside the sensor 10D, and the temperature measurement should be outsi
2. What flowmeter is used to measure compressed air?
What flowmeter is used to measure compressed air?
1. When measuring compressed air, the flowmeter is usually installed in the compressor room and blower room, and the vibration generated by the compressor and blower will be transmitted to a far place through air pipes or ducts. Vibration causes the vortex flow sensor to generate interference signals corresponding to the same vibration frequency, resulting in significantly higher flow readings.
2、 Compressed air is taken from the atmosphere, which always contains a certain amount of water vapor. A large-diameter orifice flowmeter used to measure compressed air flow often has accumulated water in front of the orifice plate, which can affect measurement accuracy. There is often a section of water in the pressure pipe, which causes the differential pressure measured by the differential pressure transmitter to be inconsistent with the differential pressure generated by the throttling device. These are common reasons for errors caused by air carrying water.
3、 The fluid at the outlet of compressors and blowers mostly contains some pulsation. Fluid pulsation can cause high readings in various flow meters such as differential pressure flow meters and vortex flow meters, leading to the up and down jumping of the attached rotor in the rotor flow meter. In order to eliminate the influence of pulsation, a buffer tank is usually installed at the outlet of the compressor to filter out pulsation, and the flowmeter is installed behind the buffer tank; Or in