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technical article
Annubar Flowmeter
2012-1-16 10:04:02

(均速管流量计)测量范围广泛,适用于大部分现场介质的测量。 Annubar flowmeter (average speed tube flowmeter) has a wide measurement range and is suitable for the measurement of most on-site media. Is a recognized energy-saving flow meter. Today, I will give you an ordinary installation method of Annubar flowmeter.

In summary, for production enterprises, we all know that the direct installation (that is, welding) connection method is normally used for the installation of Annubar flowmeters on site.

1. The first premise of installation is to confirm whether the on-site straight pipe section meets the requirements. For specific requirements, refer to the relevant manual or consult the technical department of the company, and then determine the installation direction of the flow meter according to the direction of the on-site fluid.

2. After the direction is determined, make a hole in the pipe with the help of a hole opener (the conventional hole size is 25mm)

a, single-sided support; that is, a hole is opened in the pipe according to the size of the Annubar sensor. This installation method is suitable for pipes with a diameter of less than 600mm on the site, because in the small-aperture installation method, such a

The installation method is sufficient to ensure the stability of the sensor itself and the measurement accuracy.

b; double-sided support; after determining the installation direction, open two holes of the same size in the symmetrical position on the pipe, which is opposite to the single-sided support above, that is, for the measurement of large diameter, in order to ensure the stability of the sensor

It is necessary to install Annubar flowmeter by double-sided fixing.

3. Insert Annubar flowmeter into the pipe, and fix the sensor in the correct position by spot welding, but the probe part is required to be in the entire pipe inner diameter and on the same centerline with the centerline.

4. Finally, the entire welding joint is completely welded, and the welding part is rust-proofed.


For the on-site cement pipeline, for the convenience of on-site installation, the company will also provide a steel plate with the Annubar flowmeter, and the steel plate and the on-site pipeline are bolted against each other. Then the Annubar flowmeter and steel plate still use the above installation method

是一种压力损失小,安装方便的流量计,一般适用圆形、矩形管道的流量检测。 Annubar flowmeter is a kind of flowmeter with small pressure loss and convenient installation. It is generally suitable for flow detection of round and rectangular pipes. Because the shut-off valve is mostly a needle valve, the diameter is small, when the fluid is

For air at normal temperature and pressure, if the flow velocity is 10m / s, it can only reach a differential pressure of 62.5Pa. In this way, a drop of water may seal the differential pressure transmission channel, which is enough to offset the differential pressure. Therefore, in practical applications,

The positive and negative shut-off valves can also be changed to larger straight-through gate valves, thus creating conditions for the reliable use of the instrument.


When the detection pipe diameter is large and the detection data is only used for process detection, then Annubar flowmeter can be used in general. 在气体流量检测中的成败关键在于引压管不要被水滴堵住。 The key to the success or failure of Annubar flowmeter in gas flow detection is that the impulse pipe should not be blocked by water droplets.