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The measurement of flow rate, temperature, pressure, level, etc. is the same as thermal measurement, which is one of the important measurement parameters in industrial and agricultural production process control. Flow measurement has an inseparable relationship with people’s daily life. Therefore, as a flow meter for flow measurement, it has a wide range of applications. […]

Human minds like a parachute- works best when open. Chan 9.1 Introduction In principle, there is no room for argument about what the right flowmeter for the job means. The right flowmeter is the one that will do the job adequately at the lowest possible total cost, including initial cost, and the indirect costs arising

How they work These meters operate on the same principle as turbine meters for liquids, as described in section 5.3.1. Because of the relatively low kinetic energy of a flowing gas, however, it is necessary to make a significant difference in shape. A turbine meter for gases, as shown in Figure 5.11, always has a

How they work A turbine meter is a name given to one particular type of rotating flow meter. It consists of a short length of pipe in the center of which there are two bearings supported by spiders. A propeller, large enough to fill the cross-section of the pipe almost completely, is mounted so that

Exterior The appearance of the flow meter should be complete and good, and the markings (nameplate, flow direction mark, explosion-proof mark, manufacturing measuring instrument license, etc.) should be correct, complete, and clear. There should be no scratches and other damage on the connecting surface of the external connection. Fasteners should be combined. It is firm

Factory inspection Each flowmeter must be inspected to be qualified before leaving the factory. Only when all inspection items are qualified can the flowmeter be determined to be qualified, and repairs are allowed if there are unqualified items. Timing of type evaluation Type evaluation must be carried out when one of the following conditions exists:

Flow coefficient calculation The flow coefficient of the flowmeter is calculated by the formula (1): ·················（1） The flow coefficient is related to the diameter of the measuring tube, the diameter of the target plate, the flow rate of the measured medium, the properties of the measured medium, and the performance of the sensor. It is

Basic parameters and performance Normal working environment conditions Ambient temperature： -35℃~70℃ Relative humidity:10%~95% Atmospheric pressure: 86kPa~106kPa Nominal diameter The nominal diameter of the flowmeter should be selected from the following values, the unit is millimeter (mm) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500,

The correct selection of the target flowmeter can ensure the better use of the target flowmeter. What kind of target flowmeter should be selected according to the physical and chemical properties of the fluid medium to be measured? The diameter, flow range, and output mode of the target flowmeter can be adapted to the nature