Selection of water treatment electromagnetic flowmeter

Water treatment electromagnetic flowmeter selection:

1. The large diameter of the process pipeline requires that the pressure loss of the flow meter is as small as possible. Generally do not use the pipe to reduce the diameter of the method to increase the flow rate;

2. Newly designed and installed pipelines generally choose the appropriate flow rate. Because the flow rate of the fluid is too low, the caliber of the flow meter is large, and the investment of the corresponding instrument increases. If the flow rate of the fluid is too high, it will cause a large loss of power pressure and increase the running cost. This is not economical. However, when selecting the type, there is a margin for the future expansion.

3. Due to the low flow rate of the fluid, fouling in the fluid, sludge and scale appear after running for a long time, etc., which can easily deposit on the inner wall of the pipeline and the electrode. In the engineering design, the contact between the instrument and the fluid should be considered; if the electromagnetic flowmeter can not be cleaned, scraper electrodes can be used;

4. The measuring range of the instrument requires a large range. Some water flows at night and during daytime, winter and summer have very different flow rates, up to several times. Therefore, these water flowmeters require a large range of measurement ranges.

5. The instrument's protection level is high. Most of the large-diameter pipelines are laid underground so as to save investment and space. In the north, it is also necessary for antifreeze. Therefore, split flow sensors are mostly installed in instrument wells. Because rainwater, wellbore leakage, and leakage from pipelines often cause the water level in the well to flood the flow sensor, this situation should be estimated when designing. Submersible flow sensors, such as IP68, are used. At the same time, the instrument well is well prepared for waterproof engineering.

6. Because the verification of large-caliber flow meters is often difficult to disassemble, transport and install, the process is not allowed to stop flow and stop production. It is hoped that the instrument can perform dry calibration online.