The gas turbine flowmeter is a new generation of high-precision and high-reliability gas precision metering instrument. It has excellent low-pressure and high-pressure metering performance, multiple signal output methods and low sensitivity to fluid disturbances. It has been widely used in natural gas, Metering of coal gas, liquefied petroleum gas, light hydrocarbon gas and other gases. There are several particularly important factors in the selection stage of gas turbine flowmeters that need to be paid attention to. Because they are related to the measurement effect and stable operation, they must not be sloppy.1. Five key aspects of gas turbine flowmeter selectionThe selection of gas turbine flowmeter should be considered from the following aspects:1. Accuracy level: Generally speaking, the choice of turbine flowmeter is mainly based on its high accuracy, but the higher the accuracy of the flowmeter, the more sensitive it is to changes in site conditions. Therefore, the choice of instrument accuracy is Be cautious and should be considered from an economic point of view.2. Flow range: The selection of the flow range of the turbine flowmeter has a greater impact on its accuracy and service life, and each type of flowmeter has a certain measurement range, and the selection of the flowmeter diameter is also determined by the flow range. . The principle of selecting the flow range is: the smaller flow rate when in use shall not be lower than the smaller flow rate allowed by the meter, and the larger flow rate when in use shall not be higher than the larger flow rate allowed by the meter.3. Gas density: For gas turbine flow meters, the main influence of fluid physical properties is gas density, which has a greater influence on the meter coefficient, and it is mainly in the low flow area. If the gas density changes frequently, corrective measures should be taken for the flow coefficient of the flowmeter.4. Pressure loss: Try to choose a turbine flowmeter with a small pressure loss. Because the pressure loss of the fluid through the turbine flowmeter is smaller, the energy consumed by the fluid from the input to the output pipeline is less, that is, the total power required will be reduced, which can greatly save energy, reduce transportation costs, and improve utilization. .5. Structure type: (1) The internal structure should use reverse thrust turbine flowmeter. Because the reverse thrust structure can make 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 selection, the flowmeter has two ways of horizontal and vertical installation. The horizontal installation and pipeline connection methods include flange connection, thread connection and clamp connection.
Post time: 21-09-21