The insertion electromagnetic flowmeter is a type of electromagnetic flowmeter, and it is also a very common flow meter in industrial sites. The insertion electromagnetic flowmeter is mainly used in some occasions with large pipe diameters on site. Its main advantages are easy installation and stable measurement. When encountering large-diameter pipelines on site and needing to measure flow, the advantages of the insertion type will be very obvious. Conventional electromagnetic flowmeters require large machinery to be deployed during installation. It is very inconvenient to install. The insertion electromagnetic flowmeter only needs to open a hole in the original official road for installation. It is very advantageous in terms of labor cost and time cost. The instrument cost itself is also lower than that of the pipeline electromagnetic flowmeter.
The following is how to choose the insertion electromagnetic flowmeter. The principle of selecting the caliber of the insertion electromagnetic flowmeter
1. The caliber of the sensor is the same as the caliber of the connected process pipeline. The advantage is that it is easy to install; the premise is that the flow rate of the fluid in the pipe must be within the range of 0.3m/s-10m/s; its applicable state is used in the early stage of the project and the flow rate of the fluid in the pipe is at a low state.
2. The caliber of the inserted electromagnetic flowmeter is different from the caliber of the connected process pipeline. Its applicable conditions are: ⑴ Low flow velocity and stable flow; ⑵ Reduced cost performance.
Principles for selecting the upper limit flow rate of the insertion electromagnetic flowmeter
1. Generally, the diameter of the transmitter is selected to be the same as the diameter of the connected piping. Since there is a strict functional relationship between the diameter, flow velocity and flow rate, you can refer to the electromagnetic flowmeter upper limit flow table provided by the manufacturer when selecting, and select the upper limit flow value under the corresponding diameter.
2. When the flow velocity in the process piping is low and the minimum upper limit flow value under the corresponding diameter in "1" is not reached, the diameter of the transmitter can be selected to be smaller than the diameter of the process piping, that is, a reducer can be added before and after the transmitter.
Other selection principles for insertion electromagnetic flowmeter
The lining selection should be selected by the orderer based on the corrosiveness, abrasiveness and temperature of the measured medium of the enterprise. Please refer to the "Lining Material Performance and Applicable Range Table" provided by each manufacturer. The electrode material selection should be selected by the orderer based on the corrosiveness of the measured medium of the enterprise. Please refer to the "Electrode Material Corrosion Resistance Performance Table" provided by each manufacturer. The protection level should be selected according to the national standard gb4208-84. The shell protection levels are: if the instrument is installed below the ground and is often flooded, it is advisable to choose a submersible type; if the instrument is installed on the surface, it is advisable to choose a water spray-proof type. When selecting an insertion electromagnetic flowmeter, the selection principles of its model, caliber, upper limit flow, lining, electrode material and protection level should be strictly followed.
Insertion electromagnetic flowmeters are also relatively common in the market, but there are not many manufacturers of insertion electromagnetic flowmeters. The main reason is that the advantages of insertion electromagnetic flowmeters are not very obvious when the caliber is small, and the overall accuracy is somewhat different from that of integrated pipeline flowmeters. In general, the overall market demand for insertion electromagnetic flowmeters is much smaller than that of pipeline electromagnetic flowmeters. This is also why it is difficult to find manufacturers of insertion electromagnetic flowmeters. It is even more difficult to find manufacturers that do well.