Electromagnetic Flowmeter

product manual: 

       Electromagnetic flowmeter is used to measure the volume flow of acid, alkali, salt and other strong corrosive liquids and uniform liquid-solid two-phase fluids such as mud, paper pulp, chemical raw materials, seawater, etc.; suitable for chemical industry, steel, coal, water supply and drainage, papermaking, Food, medicine, textile printing and dyeing and other industrial fields.

       The ultra-high pressure design is specially used for measurement under high pressure conditions such as petroleum exploration and geology.

       CN311A type is an integrated structure;

       CN311B type is split installation;

       Selection instructions Selection of caliber

       ·The inner wall of the measuring tube is smooth, without flow blocking parts, and without pressure loss

       ·Only the conductivity of the tested fluid is required to be greater than 5 μs/cm. Except for organic solution and distilled water, the rest of the liquid and liquid-solid two-phase fluids can meet the measurement conditions

       ·The measurement result has nothing to do with the physical parameters of liquid pressure, temperature, density, viscosity, conductivity, etc., and is not affected by the environment, so the measurement accuracy is high, and the work is stable and reliable.

       ·Excellent corrosion resistance and wear resistance

       ·Large range ratio, especially suitable for occasions where the flow rate changes greatly

       · FEP lining with metal lining net can be used for negative pressure pipeline

       ·With the function of positive/reverse two-way flow measurement

       The measurement accuracy of the electromagnetic flowmeter is related to the measured flow rate and flow rate. In the case of low flow rate, the indication error of the electromagnetic flowmeter is relatively large. Therefore, when selecting the flowmeter caliber, choose a flowmeter with a smaller caliber than the process pipeline. Increasing the flow rate of the medium in the electromagnetic flowmeter measuring tube will help improve the accuracy of flow measurement.

       1. The sensor usually chooses the same caliber as the process pipe, which is convenient for installation, but the premise is that the flow velocity in the pipe should be between 0.1m/s and 12m/s.

       2. When the flow rate is low, the process flow is stable or considering the price, the sensor diameter can be selected to be smaller than the process pipe diameter.

       3. The installation of reducing pipes will cause pressure loss. The central cone angle α of the reducing pipe should be selected to be no greater than 150, the smaller the better.

       Choice of grounding ring

       If the PTFE lining is used, the grounding ring should be used as the protective ring (for flow meters below DN250, the meter itself has ).

       If the pipe connecting the meter (relative to the measured medium) is insulated, a grounding ring must be used.

       The material of the grounding ring should be compatible with the corrosiveness of the measured medium.

       Installation suggestions

       ·The measuring tube must be completely filled with medium at any time

       ·Process pipe length:

       Inlet straight pipe section 5 × DN length

       Outlet straight pipe section 3 × DN length

       ·Can not be installed in the high point of the pipeline and the downward direction of the fluid

       ·Can be installed horizontally or vertically upwards

       Do not install control valves and shut-off valves upstream of the sensor

       ·Cannot install the sensor on the suction side of the pump