Rotameter | How to translate "vortex flowmeter" in English? | rotameter flow meter

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1. The continuation of yesterdays problem, behind the measuring valve, we believe it is atmospheric pressure, so how to measure this The word measurement can be understood as calibrating flow rate or daily measurement. There are multiple options based on the approximate range of gas flow rate and accuracy requirements: 1. Small flow rates below 1 L/min can be measured/calibrated using the most basic but accurate soap bubble flowmeter. It is particularly suitable for situations where the back pressure is zero. 2. There are different types of rotameters available for flow rates ranging from 0.01 to 100 L/min, and the accuracy is still acceptable. 3. Mass Flow Meter (MFM) is available for flow rates ranging from 0.01 to 1000 L/min, with high accuracy. 4. The flow rate ranges from 1-100 Nm3/h and can be measured using a critical Venturi nozzle (which is also one of the standard methods for measuring gas flow), with high accuracy. Standard English documents can be found online. 5. Larger industrial flow rates are measured using orifice pressure differential flow meters, vortex street flow meters, etc., with acceptable accuracy. Of course, the above traffic ranges are roughly divided. Based on the "steel cylinder" you mentioned earlier, I understand that you want to calibrate the flow curve of the measuring valve at different scales. I estimate that the flow rate should not exceed 200 L/min (at this flow rate, a 51 liter nitrogen cylinder can be emptied in 1 hour). A mass flow meter can be used to calibrate the measuring valve, and then the mass flow rate can be converted to a standard volumetric flow rate based on the gas composition and approximate molecular weight, according to the ideal gas equation. The advantage of using MFM calibration is that there is no need to worry about only changes in port pressure. It measures the molecular flow rate and has an automatic compensation function for pressure. Usually, metering valves have their own calibration curves, so sometimes you only need to calibrate a few points (such as 10, 50, 100% range) for flow verification. I dont know if my understanding of your question is correct.

2. What are the types of flow meters? Flow meter is a professional automated measuring instrument, whose main function is to measure the flow rate of fluids, including liquids, gases, steam, mixed slurries, solid dust, etc. It is precisely the special role of flow meters that in the field of industrial automation, flow meters and sensors are called the eyes of automation systems. The measurement results are transmitted to the upper computer system, which integrates and analyzes the data, and then applies the preset solutions to the upstream and downstream control systems to achieve intelligent automatic control. Common flow meters include: measuring cleaning liquids such as electromagnetic flow meters, ultrasonic flow meters, vortex flow meters, mass flow meters, orifice flow meters, turbine flow meters, metal rotor flow meters, etc. Measuring gases such as vortex flow meters, V-cone flow meters, orifice flow meters, balance flow meters, waist wheel flow meters (Roots), gas mass flow meters, etc. Measuring steam such as orifice flow meters, vortex flow meters, bend flow meters, etc. Measuring slurries such as electromagnetic flow meters. Users should choose the correct flow meter according to the requirements of the application scenario. Choosing the wrong flow meter will not only affect the project and produc

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