Abstract: Vortex flowmeter sets a vortex generator in the fluid, alternately generates regular vortices from both sides of the vortex generator, and takes the relationship between the generation frequency of fluid vortex and the fluid velocity as the flow detection information. From the point of view of engineering design, this paper studies in detail the selection of nominal diameter, the selection of integrated or split type flowmeter, the installation precautions for flowmeter, the temperature and pressure compensation, and the accurate measurement methods during the selection and design of vortex flowmeter according to different medium phases including liquid, gas and saturated steam, and elaborates the structure characteristics, type selection and application range of flowmeter.

Key words: flow?measurement, vortex?flow?meter, ?volume?flow, design?and selection