Gas turbine flowmeter is a commonly used flowmeter product, featuring high accuracy, good repeatability, simple structure, high pressure resistance, wide measuring range, small volume, etc. It is widely used in petroleum, chemical, metallurgy, scientific research and other fields of measurement , control systems and other fields. Today we mainly introduce the main points of gas turbine flow meter selection. I hope we can help you.
Selection of gas turbine flow meter
1. Accuracy level.
Gas turbine flowmeters generally have higher accuracy levels. In general, the higher the accuracy, the more sensitive to the site's use environment. From the economic benefits above, do not blindly pursue a high level of accuracy. For large-diameter flow applications, such as the West-East Gas Pipeline Project, high-precision sensors must be selected, and for the occasion where the delivery volume is small and metering is required, a general gas turbine flowmeter can be selected.
2. Gas density.
The stability of the gas density has a great influence on the measurement accuracy of the gas turbine flow meter. For occasions where the density is often changed, the flow coefficient needs to be modified in a manner to deal with it, especially for low flow areas.
3. Flow range.
The choice of the flow range of the gas turbine meter directly affects its accuracy and useful life, and it also determines the choice of flow sensor caliber. The flow rate range is generally selected according to the following criteria: the minimum flow rate should be greater than or equal to the minimum flow rate that the instrument can measure, and the maximum flow rate should be less than or equal to the maximum flow rate that the instrument can measure. For applications where the uninterrupted operation is less than eight hours, the maximum flow rate should be the actual maximum flow rate. About 1.3flow-meter.com.cn times; for non-stop work more than eight hours, the maximum flow should be more than 1.4 times the actual maximum flow; minimum flow should be the actual minimum flow of 0.8 times the best.
4. Pressure loss.
The smaller the pressure loss, the smaller the energy consumption of the gas during the flow, which can save energy, reduce transportation costs, and improve utilization. So when choosing, try to choose a gas turbine flow meter with low pressure loss. In general, a gas turbine flow meter using a semi-ellipsoidal front deflector has less pressure loss than a gas turbine meter of a cone's front deflector.
5. Structure.
The structure is determined by the above three methods: The internal structure is best to use the reverse push gas turbine flowmeter, because the structure can make the impeller in a floating state in a certain flow range, there is no contact point in the axial direction, no end surface friction and wear, The service life of the bearing can be prolonged; for the flow sensor installed in the horizontal structure, it can be connected to the pipe by flange connection, screw connection and clamp connection; for the vertical structure, the flow sensor can only be connected by thread.
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