Turbine flow meter selection considerations

Abstract: The information on the selection of turbine flowmeters is provided by the excellent flowmeter and flowmeter manufacturers. Since there are many types and specifications of turbine flowmeters, especially the quality of products of different manufacturers is different, the following points need to be considered when selecting models: 1. Flow range: The selection of the flow range of turbine flowmeters depends on its accuracy and service life. There are larger shadows. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the details of the article on the selection of turbine flowmeters. Since there are many types and specifications of turbine flowmeters, especially the quality of products of different manufacturers is different, the following points need to be considered when selecting models: 1. Flow range: The selection of the flow range of turbine flowmeters depends on its accuracy and service life. It has a great influence, and each caliber flowmeter has a certain measurement range, and the choice of the flowmeter caliber is also determined by the flow range. The principle of selecting the flow range is: the minimum flow rate in use shall not be lower than the minimum flow rate allowed by the instrument, and the maximum flow rate in use shall not be higher than the maximum flow rate allowed by the instrument. For intermittent working occasions where the actual running time of the instrument per day is not more than 8 hours, select 1.3 times the maximum flow rate in actual use as the upper limit of the flow range; for continuous working occasions where the actual running time of the instrument per day is not less than 8 hours, select the 1.4 times the maximum flow rate during use as the upper limit of the flow range. The lower limit flow rate of the instrument is appropriate to be 0.8 times the actual minimum flow rate. 2. Gas density: For gas turbine flowmeter, the influence of fluid physical properties is mainly gas density. It has a greater impact on the meter coefficient and is mainly in the low flow area. If the gas density changes frequently, corrective measures should be taken to the flow coefficient of the flowmeter. 3. Pressure loss: try to use a turbine flowmeter with a small pressure loss. Because the smaller the pressure loss of the fluid passing through the turbine flowmeter, the less energy is consumed by the fluid from the input to the output pipeline, that is, the total power required will be reduced, which can greatly save energy. Reduce transportation costs and improve utilization . 4. Structural type: (1) The reverse thrust turbine flowmeter should be selected for the internal structure. Because the reverse thrust structure can keep the impeller in a floating state within a certain flow range, there is no contact point in the axial direction, and there is no end face friction and wear, which can prolong the service life of the bearing. (2) According to the pipeline connection method, the flowmeter has two types of horizontal and vertical installation. The horizontal installation and pipeline connection methods include flange connection, threaded connection and clamp connection. Flange connection is used for medium diameter; threaded connection is used for small diameter and high pressure pipelines: clamp connection is only suitable for low pressure small diameter pipes; vertical installation only has threaded connection. (3) Select the type according to the environmental conditions, and consider the influence of temperature and humidity. Natural gas metering should choose intrinsically safe explosion-proof turbine flowmeter. 5. Bearings: The bearings of turbine flowmeters are generally made of three types of materials: tungsten carbide, polytetrafluoroethylene, and carbon graphite. Natural gas measuring instrument bearings should be made of tungsten carbide. When selecting the turbine flowmeter, try to collect the relevant technical standards of the manufacturer and the product, and then make a decision after repeated investigation and comparison. In order to avoid inaccurate selection, resulting in unnecessary losses! The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Precautions for Selection of Turbine Flow Meters'

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