There are a wide variety of instrumentation equipment for industrial flow measurement. In the use of industrial instrumentation, it is possible to choose a different instrumentation equipment because of the different environment of use. It can also be used as a form of instrumentation. But not a meter, the user will inevitably appear in the use of choice errors, about the introduction of vortex and turbine flowmeter comparison to facilitate our late selection.
Although the two instrumentation equipment in the name of some similar, but in use is not a type of instrument.
Vortex flowmeter is designed and manufactured according to the Carmen vortex principle. The fluid oscillating principle is used to measure the flow rate. When the fluid passes through the vortex flow transmitter in the pipeline, the two-row vortex is generated alternately above and below the vortex of the triangular column. The vortex release frequency is proportional to the velocity of the vortex The relationship between the average velocity of the fluid and the characteristics of the vortex generator.
The turbo flowmeter is a meter that uses a multi-blade rotor (turbine) to sense the average flow rate of the fluid and thereby derive the flow or total amount.
Turbine flowmeter is widely used in the following measurement objects: oil, organic liquid, inorganic liquid, liquefied petroleum gas, natural gas, gas and low temperature fluid and other aspects. Its structure is simple, the processing of small parts, light weight, easy maintenance, circulation capacity (the same caliber can be through the flow) and can adapt to high parameters (high temperature, high pressure and low temperature) and so on.
Market vortex flow meter is mainly used for industrial pipeline fluid flow measurement, such as gas, liquid, steam and other media. It is characterized by small pressure loss, large range range, high precision, in the measurement of the volume of flow conditions, almost no fluid density, pressure, temperature, viscosity and other parameters. No moving mechanical parts, so the reliability of high maintenance.
In the current market use, our users should be aware that the flowmeter should be used in the technical pressure of the medium working pressure and temperature range. Do not deliberately choose high pressure levels and ultra-high temperature of the instrument, should be based on the actual working pressure and temperature selection of instruments, the latter price is higher.
The lower limit flow rate of the vortex flowmeter depends on the working conditions density and kinematic viscosity of the medium. The upper limit flow rate is generally not affected by the medium pressure and temperature. Therefore, it is only necessary to determine the actual lower limit flow rate. After calculating the lower limit flow, check the flow range table to determine the corresponding caliber.
Flowmeter selection as far as possible not to use the flow of work in the lower limit, so the caliber of the flowmeter should be as small as possible to obtain a larger flow rate and flow range.
These are the instruments used to choose, the need to pay attention to some of the problems, the use of the instrument, the user if you want to use more accurate to ensure the stability of its performance, for the measurement of these details, but can not relax. Understand the measurement principle of each flowmeter and installation technical requirements, for the correct flow meter selection provides a good theoretical basis.