Questions regarding flow meter selection

Anubaa, Wiliba, and DeltaBa all belong to the category of differential pressure flow meters, and are classified as average velocity tube flow meters. They have been in use for over 50 years, and possess unique advantages in measuring fluids in large-diameter pipes. The differential pressure signal produced by these meters is relatively stable, with high accuracy; they also offer a wide range of measurement capabilities and low pressure loss. However, their strength is limited, which leads to frequent cases where Anubaa meters get bent by the flow of fluid. This situation gave Wiliba an opportunity to take its place, thanks to its advantages of high strength and high precision. Thus, the era of Wiliba began, and it became very popular as an excellent example of an average velocity tube flow meter in China. As a more modern version of such flow meters, DeltaBa does not offer any significant advancements; it is advertised as having large orifices, good anti-clogging properties, and the advantage of generating high differential pressures. Yet, the reality of low pressure loss combined with high differential pressures means that the claim that DeltaBa generates high differential pressures is nothing but a joke... Among differential pressure flow meters, the Anubaa/Wiliba/DeltaBa type (average velocity tube flow meters) are quite popular these days, especially imported models like Anubaa, DeltaBa, Wiliba, and Iteba. They boast low pressure loss, easy installation, and good repeatability, and they have significant advantages when it comes to measuring fluids in large-diameter pipes.   At present, many users in China, including numerous professionals, do not have a clear understanding of the Anubaa, Weilibaa, Yitbaa, and Deltaaa products; they even think that all Ba-type products are called Anubaa or Weilibaa. In fact, this is a serious misunderstanding. Vane flowmeters were developed based on the principle of velocity measurement using pitot tubes; they were first manufactured by the American company DIETERICH in 1968, with the first sets being used at Chicago Airport. To facilitate sales, they registered the product as ANNUBAR. Later, the DIETERICH company was acquired by ROSEMOUNT. When this product entered China in the 1980s, it became popular among users, and many domestic factories began to produce imitation versions, also calling them ANNUBAR. In reality, however, such devices should be referred to as pitot tubes or average velocity tubes, as ANNUBAR is a registered trademark belonging to another company. During this period, around the late 1980s and early 1990s, some foreign companies that had first come into contact with ANNUBAR products developed products such as VERABAR, ITABAR, TORBAR, DELTABAR, and others through learning and improvement. They made enhancements to ANNUBAR by introducing different shapes for the testing rods. Notably, German companies ITABAR and DELTABAR developed sensors specifically designed for measuring the flow rate of main steam in boilers; these sensors can handle temperatures of up to 650 degrees and pressures of 400 kilograms, and they are made from P91 material, the same material used in the main steam pipes

Anubaa, Wiliba, and DeltaBa all belong to the category of differential pressure flow meters, and are classified as average velocity tube flow meters. They have been in use for over 50 years, and possess unique advantages for measuring fluids in large diameters. The differential pressure signal produced by these meters is relatively stable, with high accuracy; they also offer a wide range of measurement capabilities and low pressure loss. However, their strength is limited, which leads to frequent cases where Anubaa meters get bent by the flow of fluid. This situation gave Wiliba an opportunity to take its place, thanks to its higher strength and precision. Thus, the era of Wiliba began, and it became very popular as an excellent example of an average velocity tube flow meter in China. As a more modern version of such flow meters, DeltaBa does not offer any significant advancements; it is advertised as having large orifices, good anti-clogging properties, and the advantage of generating high differential pressures. Yet, the reality of low pressure loss combined with high differential pressures means that the claim that DeltaBa generates high differential pressures is nothing but a joke... Among differential pressure flow meters, the Anubaa/Wiliba/DeltaBa type (average velocity tube flow meters) are quite popular these days, especially imported models like Anubaa, DeltaBa, Wiliba, and Iteba. They boast low pressure loss, easy installation, and good repeatability, and they are particularly advantageous for measuring fluids in large diameters. At present, many users in China, including numerous professionals, do not have a clear understanding of the Anubaa, Weilibaa, Yitbaa, and Deltaaa products; they even think that all Ba-type products are called Anubaa or Weilibaa. In fact, this is a serious misunderstanding. Vane flowmeters were developed based on the principle of velocity measurement using pitot tubes; they were first manufactured by the American company DIETERICH in 1968, with the first sets being used at Chicago Airport. To facilitate sales, they registered the product as ANNUBAR. Later, the DIETERICH company was acquired by ROSEMOUNT. When this product entered China in the 1980s, it became popular among users, and many domestic factories began to produce imitation versions, also calling them ANNUBAR. In reality, however, such devices should be referred to as pitot tubes or average velocity tubes, as ANNUBAR is a registered trademark belonging to another company. During this period, around the late 1980s and early 1990s, some foreign companies that had first come into contact with ANNUBAR products developed products such as VERABAR, ITABAR, TORBAR, DELTABAR, and others through learning and improvement. They made enhancements to ANNUBAR by introducing different shapes for the testing rods. Notably, German companies ITABAR and DELTABAR developed sensors specifically designed for measuring the flow rate of main steam in boilers; these sensors can handle temperatures of up to 650 degrees and pressures of 400 kilograms, and they are made from P91 material, the same material used in the main steam pipes

I think no matter what type of flow measurement is required, the first thing to consider should be an orifice plate; if that doesn’t work, then other options can be chosen. To measure steam flow, why can’t an orifice plate be used?

They are all Ba-type flow meters; their measurement accuracy is not high, and they require fairly long straight sections. Agree that an empty board should be the first choice on floor 6

During the meeting with the design institute, we also suggested using orifice plate flow meters, but the institute rejected this idea, stating that it would be inconvenient to replace them in case of problems, and that their use in power plants posed safety risks as well as difficulties in maintenance.

They are all bar-type flowmeters, falling under the category of differential pressure flowmeters; the differences between them are not significant – it depends on which one better meets the requirements of the specific application.

Regarding Ba-type flow meters, what Haiyou on the 3rd floor said is detailed and objective; I fully agree. In my opinion, Ba-type flowmeters are more suitable for measuring large-diameter, clog-prone media. As for the question of which types of barometric flow meters are better or worse, as mentioned by the original poster, I wouldn’t dare to give an opinion. I have used Delta Barometric flow meters for nearly 2/300 units, and their performance has always been good; of course, these were all used for measuring gases at large diameters, with most of the media being those prone to clogging. To measure the main steam flow in power plants, it is recommended to use venturi or nozzle flow meters.

DeltaV can be used; our power plant relies on it to measure steam flow. Anubis isn’t suitable for this purpose, as it is generally used for measuring large-diameter streams of clean gases.

Anubaa, Wiliba, and DeltaBa all belong to the category of differential pressure flow meters, and are classified as average velocity tube flow meters. They have been in use for over 50 years, and possess unique advantages for measuring fluids in large diameters. The differential pressure signal produced by these meters is relatively stable, with high accuracy; they also offer a wide range of measurement capabilities and low pressure loss. However, their strength is limited, which leads to frequent cases where Anubaa meters get bent by the flow of fluid. This situation gave Wiliba an opportunity to take its place, thanks to its higher strength and precision. Thus, the era of Wiliba began, and it became very popular as an excellent example of an average velocity tube flow meter in China. As a more modern version of such flow meters, DeltaBa does not offer any significant advancements; it is advertised as having large orifices, good anti-clogging properties, and the advantage of generating high differential pressures. Yet, the reality of low pressure loss combined with high differential pressures means that the claim that DeltaBa generates high differential pressures is nothing but a joke... Among differential pressure flow meters, the Anubaa/Wiliba/DeltaBa type (average velocity tube flow meters) are quite popular these days, especially imported models like Anubaa, DeltaBa, Wiliba, and Iteba. They boast low pressure loss, easy installation, and good repeatability, and they are particularly advantageous for measuring fluids in large diameters. At present, many users in China, including numerous professionals, do not have a clear understanding of the Anubaa, Weilibaa, Yitbaa, and Deltaaa products; they even think that all Ba-type products are called Anubaa or Weilibaa. In fact, this is a serious misunderstanding. Vane flowmeters were developed based on the principle of velocity measurement using pitot tubes; they were first manufactured by the American company DIETERICH in 1968, with the first sets being used at Chicago Airport. To facilitate sales, they registered the product as ANNUBAR. Later, the DIETERICH company was acquired by ROSEMOUNT. When this product entered China in the 1980s, it became popular among users, and many domestic factories began to produce imitation versions, also calling them ANNUBAR. In reality, however, such devices should be referred to as pitot tubes or average velocity tubes, as ANNUBAR is a registered trademark belonging to another company. During this period, around the late 1980s and early 1990s, some foreign companies that had first come into contact with ANNUBAR products developed products such as VERABAR, ITABAR, TORBAR, DELTABAR, and others through learning and improvement. They made enhancements to ANNUBAR by introducing different shapes for the testing rods. Notably, German companies ITABAR and DELTABAR developed sensors specifically designed for measuring the flow rate of main steam in boilers; these sensors can handle temperatures of up to 650 degrees and pressures of 400 kilograms, and they are made from P91 material, the same material used in the main steam pipes