Annubar flowmeter

Annubar flowmeter

4 month ago

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Jiangsu Leitai Automation Instrument Co., Ltd.

 9 month year

Product details

The Verabar flowmeter adopts an engineering structural design that is completely in line with aerodynamic principles. It is a sensing element that has reached an unparalleled level of excellence in accuracy, efficiency and reliability.

Our main products are: Electromagnetic flowmeter, Energy meter, Vortex flowmeter, Pressure transmitters, Level gauge, Magnetic flap level gauge.

Purpose of Verabar flowmeter

Verabar flow meters are suitable for high-precision flow measurement of gases, liquids and steam. The Verabar flowmeter is a differential pressure, rate average flow sensor that measures flow through the differential pressure generated by the sensor in the fluid. The Verabar flowmeter reflects the true flow rate of the fluid, with an accuracy of ± 1.0 and a repeatability of ± 0.1. The outstanding advantage of Verabar is that it outputs a very stable, pulsation-free differential pressure signal.

Design features of the probe

The probe with a bullet cross-section shape can produce precise pressure distribution and a fixed fluid separation point; the low-pressure pressure tapping holes located on both sides of the probe and in front of the fluid separation point can generate a stable differential pressure signal and effectively prevent blockage. The internal integrated structure can avoid signal leakage, improve the structural strength of the probe, and maintain long-term high accuracy.

Verabar probe anti-clogging design

With its excellent anti-clogging design, the Verabar flow probe completely gets rid of the shortcomings of plug-in flow probes such as Annubar that are prone to clogging, making the anti-clogging level of the velocity-averaging tube flow probe reach an unprecedented level.

The high-pressure tapping hole of the probe will not be blocked. The front of the probe forms a high-pressure area. The pressure is slightly higher than the static pressure of the pipeline, preventing particles from entering. Please note: the velocity of the fluid at the high-pressure tapping hole of the probe is zero and no objects will enter the pressure tapping hole. When starting up, the fluid enters the elbow under the action of the static pressure of the pipe, and a pressure balance state is quickly formed. When the pressure equilibrium state is formed, the fluid encounters high pressure at the entrance of the elbow and takes a detour instead of entering the elbow.

The low-pressure hole of the Verabar flowmeter is essentially anti-blocking. Under normal circumstances, dust, sand and particles are concentrated at the rear of the probe under the action of vortex forces. This is why autumn foliage is always concentrated behind houses in the lee. For other probes, the low-pressure tapping hole is located in the vacuum area at the tail of the probe. Under the action of vortex force, the low-pressure tapping hole of the probe is quickly blocked by impurities brought by the eddy current. The unique design of the Verabar flowmeter places the low-pressure tap holes on both sides of the rear side of the probe, at the fluid separation point and in front of the wake area. This design inherently prevents clogging and produces a very stable low voltage signal.

Advantages of probes

● Can measure a variety of media and has a wide range of applications

● High precision and large range ratio

● The probe pressure hole is essentially anti-blocking

● The measurement signal is stable and has small fluctuations.

● Pipeline permanent pressure loss is low

● Unique high-strength bullet-shaped single-piece dual-chamber structure

● Low installation cost and basically maintenance-free

● Can be installed and inspected online

Characteristics of Verabar velocity averaging tube flow sensor

● Stable signal

The low-pressure tapping holes of Verabar are located on both sides of the rear side of the probe, between the separation point between the fluid and the probe, away from the eddy current fluctuation area.

●Excellent long-term high accuracy

Verabar can ensure long-term stability of accuracy because:

. It is not affected by wear, dirt and oil.

. There are no movable parts in the structure.

. The design eliminates the occurrence of clogging. At the front of the probe, a high static pressure area surrounds the probe so that the high-pressure tapping hole will not be blocked. The most important thing is that the low-pressure holes are taken on both sides of the probe side, and the fluid sweeps obliquely from the surface, protecting the low-pressure holes from being swept. Other probes are easily blocked because their low-pressure holes are located where impurities gather. Low pressure fluctuation area.

● Lowest installation costs

⑴. Only a few inches of line welding is required, and the installation is very simple and fast.

⑵. Using special tools, online installation under pressure can be achieved.

⑶. All valves and various instrument interfaces require simple assembly, requiring very low assembly costs.

● Very low running costs

⑴. It is a non-shrinking throttling design. As a plug-in flow probe, the operating cost of Verabar is the lowest.

⑵. Verabar flowmeter only produces very low permanent pressure loss, typically less than 0.7KPa

⑶. The permanent pressure loss generated by an orifice element exceeds 14KPa

⑷. Compared with the orifice plate, the energy loss of Verabar is reduced by 95%.

● The continuous working of Verabar fundamentally eliminates the possibility of blockage. However, under the following circumstances, Veraba should still pay attention to prevent blockage:

⑴. When the pressure tube leaks, the high-pressure balance area of the probe is destroyed, and impurities with smaller diameters may enter the pressure hole.

⑵. When the pipeline is out of production, small impurities may enter the pressure hole due to Brownian motion of molecules.

⑶. The system is frequently started and shut down. At the moment when the high-pressure area is formed, impurities with small particles may enter the pressure tapping hole. Over time, it may cause the probe to be blocked.

⑷. The medium contains a large amount of tar, algae, or fibrous substances, which may also cause clogging of the probe.

Main Specifications

1. Performance indicators of Veraba flow measurement system

1) Measurement accuracy: ±0.5~1% Repeatability: ±0.1

2) Applicable pressure: 0～40MPa Applicable temperature: -100℃～+500℃

3) The upper limit of measurement: depends on the process requirements and the strength of the probe; the lower limit of measurement: depends on the minimum differential pressure requirement. When it is lower than the minimum differential pressure, special design can be used to meet the requirements.