The difference between vortex flowmeter and orifice flowmeter
Abstract: In this article, we compare the current technical level and comprehensive performance of both vortex flowmeters and orifice flowmeters. Let us further understand the difference between the two flowmeters.
1. Technical comparison between vortex flowmeter and orifice flowmeter
1. The structure of the vortex flowmeter is relatively simple. It consists mainly of three components: the vortex generator, the detection component, and the signal amplifier. At present, our research on the vortex generator of the vortex street is quite mature, and the vortex body is superior to the triangular prism. Form, at the same time, the vortex flowmeter also has the characteristics of simple installation, high precision and stable operation for a long time;
2. The technical level of the orifice flowmeter at this stage is still based on the determination of the empirical formula. In 1980 , the International Organization for Standardization merged the two standards of R541 and R781 into the standard ISO5167 (1980) ;
3, the structure of the orifice flowmeter is also relatively simple, low cost, reliable and so on, the orifice flowmeter can measure almost all the medium, and the use of the differential pressure transmission is enough to make up for its own shortcomings;
2 , the comparison of the performance of the vortex flowmeter and the orifice flowmeter
1. The orifice flowmeter consists of a throttle device and a differential pressure transmitter, and the conduit requires heating measures for the frozen installation. Usually, the orifice flowmeter is used to measure the flow. :
· It is easy to freeze, easy to block, easy to leak, and heat is easy to cause aging of differential pressure transmitter device. In some cases, the pressure guiding tube needs to be added with isolation liquid. Due to heat or process instability, positive and negative pressure guiding tube isolation liquid The liquid lines are often unequal, resulting in a liquid column difference, making the flow indication inaccurate;
· The above will change the flow measurement result, and there will be an error. If the pressure guiding tube is shortened and installed directly on the pipeline, there will still be a flow dead zone.
2. Due to the small static sealing point of the vortex flowmeter, there will be no leakage or media flow dead zone phenomenon during the flow measurement process, and the heat tracing measures of the pipeline are not required, which are not affected by the pressure, temperature and viscosity of the medium.
Summary: From the above two comparisons, it can be concluded that the advantages and failure rate of the vortex flowmeter are significantly lower than that of the orifice flowmeter when measuring the same medium. This is the vortex flowmeter that can be used in the market every year. 30% of sales growth reasons
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