（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。 DXANB series Annubar flowmeters (also known as flute-shaped averaging tube flowmeters and toba tube flowmeters ) are differential pressure flowmeters. 是采用皮托管测量原理测量挡体上游的动压力与下游的静压力之间形成的压差，从而达到测量流量的目的。 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. 主要用于工业过程中各种能源如液体、燃料气、蒸气和气体的测量，具有较高的稳定性和重复性。 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.
Uses and characteristics
以其安装简便、压损小、强度高、不受磨损影响、无泄漏等特点而成为替代孔板的理想产品。 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 low-voltage signals, and produces a differential pressure higher than similar products, which improves the range ratio.
b. Suitable for square or rectangular pipes.
c. For the inevitable blockage 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 provide intuitive resonance check calculation to ensure long-term stable operation.
g, low pressure loss, low energy consumption, significant energy saving effect
h. Easy installation, labor saving, low price and fast delivery (1 week)
主要技术指标 Annubar flowmeter main technical indicators
1.Suitable for measuring the flow of liquid, gas and steam
2.Accuracy is ± 1% of the measured actual flow value
3.The repeatability of the measurement is ± 0.1%
4. Range ratio of flow, typically 10: 1 (differential pressure value 100: 1)
5. Maximum working temperature is up to 1300 ° C (with appropriate materials and installation parts)
6. The highest working pressure is up to 400Bar (40MPa)
7.The highest viscosity is 500 cp
8. Requires shorter length of upstream and downstream straight pipe
9.Standard stainless steel grade
10, long-term accuracy is not affected by wear
High temperature resistant material
Measuring pipe diameter
℃以下 Below 120 ℃
℃以下 Below 220 ℃
With differential pressure transmitter only
With flow totalizer only
With differential pressure transmitter and flow totalizer