Annubar flowmeter installation and use
是高精度传感器，能在相当复杂的工况下正常工作，并保持良好的性能。 Annubar flowmeter is a high-precision sensor, which can work normally under quite complicated working conditions and maintain good performance. In order to achieve the best performance, the flowmeter needs to be reasonably installed and maintained. When selecting this product, the inner diameter of the measuring tube must be provided accurately. Because the distribution of the pressure holes of the designed probe is calculated according to the center of the pipe, if there is a large error in the inner diameter of the pipe, it will cause the probe to be different from the measured pipe and cause a large measurement error. As a flow meter for measurement, it is recommended to use a probe with a full pipe insertion, especially when the straight pipe section does not meet the requirements. Annubar flowmeter replaces the cross-sectional flow velocity of the orifice plate by measuring the flow velocity on a certain diameter, and the flow velocity on different diameter lines is not exactly the same (unless the straight pipe section where it is located is long enough), so if the installation position and Improper orientation will lead to invalid measurement or inaccurate measurement. Therefore, when selecting the type, theoretical analysis and calculation should be performed according to the installation conditions, and the appropriate installation position and installation method should be selected to achieve the best results. Flowmeter probe installation is recommended to be installed under the guidance of the manufacturer to prevent large measurement errors due to probe installation
（又称笛形均速管流量计和托巴管流量计）属于差压式流量计。 DEC-ANB series Annubar flowmeter (also known as flute-shaped averaging tube flowmeter and toba tube flowmeter) is a differential pressure flowmeter. Annubar flowmeter uses the principle of pitot tube measurement to measure the pressure difference between the dynamic pressure upstream of the block and the static pressure downstream, so as to achieve the purpose of measuring flow. The measuring pipe diameter is between DN20 and DN12000. Annubar flowmeter is mainly used for the measurement of various energy sources such as liquid, fuel gas, vapor and gas in the industrial process. It has high stability and repeatability. The design theory is in accordance with the principle of the Berkeley equation, and can be tested by the JJG / 640-90 procedure.
用途及特点： Annubar flowmeter uses and features:
Annubar flowmeter is an ideal product to replace orifice plate because of its simple installation, low pressure loss, high strength, no influence of wear, no leakage, etc. It can be widely used for measuring the flow of blast furnace gas, compressed air, steam and other liquids and gases in industrial and mining enterprises.
1 Unique internal secondary average structure, providing high accuracy (± 1% of reading) and high repeatability (± 0.1%).
2 The outer impact tube is made of a single piece of material without welding. Compared with similar products made of double-body structures, it has the highest strength, and it is also easy to choose high temperature and corrosion resistant materials.
a The honeycomb hexagonal stable structure produces a unique stream beam distribution shape, which ensures the stability of the low-voltage signal, and produces a differential pressure higher than similar products, which improves the range ratio.
b Suitable for square or rectangular pipes.
cFor the inevitable blockage problem of similar products when measuring dirty media, there are online pluggable types or manual and automatic purge solutions and devices are provided to achieve non-stop maintenance.
d The average speed tube + three valve group + temperature and pressure compensation + transmitter form an integrated structure, which is easy to use.
e No flow coefficient drift, long-term stability.
f Exclusively provides intuitive resonance check to ensure long-term stable operation.
g Low pressure loss, low energy consumption, significant energy saving effect
h Simple installation, labor saving, low price and fast delivery (1 week)
1 suitable for measuring the flow of liquids, gases and vapors
2 Accuracy is ± 1% of the measured actual flow value
3 Measurement repeatability is ± 0.1%
Range ratio of 4 flows, typically 10: 1 (differential pressure value 100: 1)
5 Maximum working temperature up to 1300 ° C (with appropriate materials and mounting parts)
6 Maximum working pressure up to 400Bar (40MPa)
7Up to 500 cp
8Requires shorter length of upstream and downstream straight pipe sections
9 standard stainless steel grades
10 Long-term accuracy is not affected by wear