The choice principle of electromagnetism flowmeter, electromagnetism flowmeter specification USES the same specification as piping system normally, if piping system still needs to be designed, can choose specification according to flowrate category and velocity.For the electromagnetic flowmeter, the flow rate of 2~4m/s is more appropriate.Under special circumstances, if there are solid particles in the liquid, the common flow rate ≤3m/s can be selected, and the flow rate ≥2m/s can be used for liquids that are easy to attach to management.After the flow rate is clear, the meter specification can be clear.
The measuring range of the electromagnetic flowmeter can be selected according to two criteria: first, the full range of the meter exceeds the expected large flow value;Second, under normal circumstances, the flow rate exceeds 50% of the full range of the meter to ensure a certain degree of accurate measurement accuracy.
The choice principle of electromagnetic flowmeter
Choice of temperature and pressure
Electromagnetic flowmeter can accurately measure the liquid pressure and temperature is a certain limit, when using, the application pressure must be less than the flow meter specified pressure.At present, the pressure specifications of electromagnetic flowmeters produced in China are as follows:
Less than 50mm, the pressure is 1.6mpa;
900mm, pressure is 1MPa;
Pressure is 0.6mpa for exceeding 1000mm specification.
The operating temperature of the electromagnetic flowmeter depends on the common lining materials, generally 5-70¡æ.If a special solution can be made to go beyond the above category, the sensor allows the temperature of the medium under test to be -40-+130¡æ.
Lining material and electromagnetic flowmeter material selection
The lining materials and electrode materials of the electromagnetic flowmeter must be reasonably selected according to the physical and chemical properties of the medium, otherwise the meter will be damaged quickly due to the lining and electrical corrosion, and if the corrosive medium leakage is very easy to cause accidents.Therefore, must be based on the production process in the specific accurate measurement of the medium, careful choice of electrical grade and lining of raw materials.
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