1, working principle
In the use of a vortex flowmeter, a triangular column type vortex generating body arranged in the fluid alternately generates two rows of regular vortices from both sides of the vortex generating body. This vortex is called a Karman vortex principle.
2, the scope of application
Gas: air, oxygen, but it, gas, natural gas, chemical gas, etc.
Liquid: water, high temperature water, oil, food liquid, chemical liquid, etc.
Steam: saturated steam, superheated steam
3, selection points
In order for the flowmeter to work with good performance, the following points should be noted when selecting the flow model and specification:
(1). Flowmeters are not designed to operate at the lower limit as much as possible. Therefore, the diameter of the flowmeter should be as small as possible to obtain a larger flow rate and flow range.
(2). The flowmeter should be used within the technical parameters of the working pressure and temperature range of the medium. Do not deliberately select high-pressure and ultra-high temperature instruments. The instrument should be selected according to the actual working pressure and temperature. The price of the latter should be higher.
(3). Explosion-proof flowmeters should be used in explosion hazardous locations.
(4). The lower limit flow rate of the vortex flowmeter depends on the working condition density and kinematic viscosity of the medium. The upper limit flow rate is generally not affected by the medium pressure and temperature. Therefore, the flow rate range can be determined only by determining the actually available lower limit flow rate. After calculating the lower limit flow, check the flow range table to determine the corresponding caliber.