Annubar flowmeter is a differential pressure flowmeter. It uses the pitot tube measuring principle to measure the pressure difference formed between the dynamic pressure upstream of the baffle and the static pressure downstream, so as to achieve the purpose of measuring the flow. The diameter of the measuring pipe is between DN20 and DN12000. Annubar flowmeter is mainly used for the measurement of various energy sources such as liquid, fuel gas, steam and gas in industrial processes, with high stability and repeatability. The design theory of Annubar flowmeter is in accordance with the principle of Bernhard equation, and can be verified by JG / 640-90 regulations.
Purpose and characteristics
Annubar flowmeter is an ideal product to replace the orifice plate due to its easy installation, low pressure loss, high strength, no impact by wear, and no leakage. Annubar flowmeter can be widely used in the flow measurement of blast furnace gas, compressed air, steam and other liquids and gases in industrial and mining enterprises.
1 Unique internal secondary average structure provides high accuracy (reading ± 1%) and high repeatability (± 0.1%).
2 The outer impact tube is made of a single piece of material without welding, which naturally has the highest strength compared to the similar products welded by the double body structure, and it is also convenient to select high temperature and corrosion resistant materials.
a Honeycomb hexagonal stable structure, which produces a unique flow distribution shape, ensures the stability of the low-voltage signal, the resulting differential pressure is higher than similar products, and the range ratio is improved.
b Suitable for square or rectangular pipes.
c As for the inevitable clogging problem of similar products when measuring dirty media, there are online pull-out models or manual and automatic purge programs and devices are provided to achieve non-stop maintenance.
d Average speed tube + three valve group + temperature and pressure compensation + transmitter, forming an integrated structure, easy to use.
e No flow coefficient drift, long-term stability.
f Exclusively provide intuitive resonance calculation to ensure long-term stable operation.
g Low pressure loss, low energy consumption, significant energy saving effect
The output of the Annubar flowmeter is a differential pressure signal. It is used in conjunction with instruments that measure differential pressure. It can accurately measure a variety of liquids, gases and steam (superheated steam and saturated steam) in He-shaped pipes and rectangular pipes. The size of the tested pipeline ranges from 20MM-3000MM. Aniuba has been successfully used in the power industry (including nuclear industry), chemical industry, petrochemical industry and metal smelting industry. It is suitable for:
1. Gas delivery and liquid delivery
2. Energy research, steam boiler heat rate, water pump efficiency, gas compressor efficiency and fuel consumption
3. Process control: input and output, ratio, balance; cooling water or air, steam heating.
4. Feeding in the chemical industry:
parameter
1. Specification: DN50-DN5000 (mm); plug-in type: DN500-DN5000 (mm)
2. Measurement accuracy: ± 6.0%; repeatability: ± 0.1%;
3. Range: volume flow: 10: 1; mass flow: 8: 1;
4. Working pressure: the uniform speed tube has no proposed functional type: ≤20MPa;
The uniform velocity tube can be proposed: ≤10MPa;
5. Fluid temperature: ≤450 ℃;
6. Medium viscosity: ≤30CP (equivalent to heavy oil);
7. Material:
Velocity tube, three valve groups: various grades of stainless steel (optional);
Main pipe and flange: stainless steel or carbon steel (optional);
Brief introduction of Verabar working principle
When the fluid flows through the probe, a high-pressure distribution area is generated at the front of the probe, and the pressure in the high-pressure distribution area is slightly higher than the static pressure of the pipeline. According to the principle of Bernoulli's equation, the fluid flows faster through the probe, and a low pressure distribution area is generated at the rear of the probe. The pressure in the low pressure distribution area is slightly lower than the static pressure of the pipeline. After the fluid flows through the probe, a partial vacuum is generated at the rear of the probe, and vortices appear on both sides of the probe. The cross-sectional shape of the average velocity flow probe, the roughness of the surface and the position of the low-pressure pressure tapping hole are the key factors that determine the performance of the probe. The stability and accuracy of the low-voltage signal play a decisive role in the accuracy and performance of the average velocity probe. Verabar's average velocity flow probe can accurately detect the average differential pressure produced by the average velocity of the fluid. Verabar's average velocity flow probe has multiple pairs of pressure tapping holes arranged according to certain criteria in the high and low pressure areas, making it possible to accurately measure the average flow rate.
Now the parameters required by the Annubar flowmeter:
1. The measured medium
2. The temperature of the measured medium
3. The pressure of the measured medium
4. The flow of the measured medium
5. The viscosity of the measured medium
Advantages of Annubar flowmeter
Annubar flowmeter (also known as flute-shaped uniform velocity tube flowmeter) is a new type of differential pressure flow detection element developed based on the pitot tube speed measurement principle. The Aniuba flowmeter produced by our factory has novel design, reasonable structure, high precision, small pressure loss, and easy installation and use. With its special advantages, it gradually replaces the orifice plate and other detection components in many occasions. The product has passed the provincial appraisal .
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Thickness: 12 micron,50mic, 100mic,150mic, 188mic
Roll diameter: 76mm and 152mm
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